import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
//		executeCountBalls();
		executeTaxIncrease();
	}

	private static void execute() {

		Scanner in = new Scanner(System.in);

		try {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		}

	}

	public static void execute_product() {

		Scanner in = new Scanner(System.in);

		try {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}

	public static void executeCountBalls() {
		Scanner in = new Scanner(System.in);

		try {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}


	public static final int TAX_RATE_8 = 8;
	public static final int TAX_TATE_10 = 10;

	public static void executeTaxIncrease(){

		Scanner in = new Scanner(System.in);

		double tax8 = (double)in.nextInt();
		double tax10 = (double)in.nextInt();

		int taxExclude_min = (int)Math.ceil((tax8 * 100)/TAX_RATE_8);

		int taxExclude_max = 0;
		if( ((tax8 + 1)*100)%8 == 0 ) {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		}	else {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		}

//		System.out.println(taxExclude_min + " " + taxExclude_max);

		int taxExclude_fix = -1;
		for( int val = taxExclude_min; val <= taxExclude_max; val++) {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		}
		System.out.println(taxExclude_fix);
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
//		executeCountBalls();
		executeTaxIncrease();
	}

	private static void execute() {

		Scanner in = new Scanner(System.in);

		try {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		}

	}

	public static void execute_product() {

		Scanner in = new Scanner(System.in);

		try {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}

	public static void executeCountBalls() {
		Scanner in = new Scanner(System.in);

		try {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}


	public static final int TAX_RATE_8 = 8;
	public static final int TAX_TATE_10 = 10;

	public static void executeTaxIncrease(){

		Scanner in = new Scanner(System.in);

		double tax8 = (double)in.nextInt();
		double tax10 = (double)in.nextInt();

		int taxExclude_min = (int)Math.ceil((tax8 * 100)/TAX_RATE_8);

		int taxExclude_max = 0;
		if( ((tax8 + 1)*100)%8 == 0 ) {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		}	else {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		}

//		System.out.println(taxExclude_min + " " + taxExclude_max);

		int taxExclude_fix = -1;
		for( int val = taxExclude_min; val <= taxExclude_max; val++) {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		}
		System.out.println(taxExclude_fix);
	}

} Main public static final int TAX_RATE_8 = 8; TAX_RATE_8 8 public static final int TAX_TATE_10 = 10; TAX_TATE_10 10 public static void main(String[] args) {
//		executeCountBalls();
		executeTaxIncrease();
	} main {
//		executeCountBalls();
		executeTaxIncrease();
	} executeTaxIncrease() executeTaxIncrease String[] args args private static void execute() {

		Scanner in = new Scanner(System.in);

		try {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		}

	} execute {

		Scanner in = new Scanner(System.in);

		try {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		}

	} Scanner in = new Scanner(System.in); in new Scanner(System.in) try {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		} NumberFormatException e {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		} System.out.println("") System.out.println System.out System System.out "" {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} String s1 = in.nextLine(); s1 in.nextLine() in.nextLine in String s2 = in.nextLine(); s2 in.nextLine() in.nextLine in String s3 = in.nextLine(); s3 in.nextLine() in.nextLine in int  a = Integer.parseInt(s1); a Integer.parseInt(s1) Integer.parseInt Integer s1 String[] s2Array = s2.split(" "); s2Array s2.split(" ") s2.split s2 " " int b = Integer.parseInt(s2Array[0]); b Integer.parseInt(s2Array[0]) Integer.parseInt Integer s2Array[0] s2Array 0 int c = Integer.parseInt(s2Array[1]); c Integer.parseInt(s2Array[1]) Integer.parseInt Integer s2Array[1] s2Array 1 int sum  = a + b + c; sum a + b + c a + b + c a b c System.out.println(sum + " " + s3) System.out.println System.out System System.out sum + " " + s3 sum + " " + s3 sum " " s3 public static void execute_product() {

		Scanner in = new Scanner(System.in);

		try {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	} execute_product {

		Scanner in = new Scanner(System.in);

		try {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	} Scanner in = new Scanner(System.in); in new Scanner(System.in) try {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		} Exception e {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		} e.printStackTrace() e.printStackTrace e {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} int a  = in.nextInt(); a in.nextInt() in.nextInt in int b  = in.nextInt(); b in.nextInt() in.nextInt in if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			} (a*b)%2 == 0 (a*b)%2 (a*b) a b 2 0 {
				System.out.println("Even");
			} System.out.println("Even") System.out.println System.out System System.out "Even" {
				System.out.println("Odd");
			} System.out.println("Odd") System.out.println System.out System System.out "Odd" public static void executeCountBalls() {
		Scanner in = new Scanner(System.in);

		try {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	} executeCountBalls {
		Scanner in = new Scanner(System.in);

		try {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	} Scanner in = new Scanner(System.in); in new Scanner(System.in) try {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		} Exception e {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		} e.printStackTrace() e.printStackTrace e {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} long N = in.nextLong(); N in.nextLong() in.nextLong in long A = in.nextLong(); A in.nextLong() in.nextLong in long B = in.nextLong(); B in.nextLong() in.nextLong in long surplus = N%(A+B); surplus N%(A+B) N (A+B) A B long surplusA = surplus >= A ? A : surplus; surplusA surplus >= A ? A : surplus surplus >= A surplus A A surplus long countA = N/(A+B) * A + surplusA; countA N/(A+B) * A + surplusA N/(A+B) * A N/(A+B) N (A+B) A B A surplusA System.out.println(countA) System.out.println System.out System System.out countA public static void executeTaxIncrease(){

		Scanner in = new Scanner(System.in);

		double tax8 = (double)in.nextInt();
		double tax10 = (double)in.nextInt();

		int taxExclude_min = (int)Math.ceil((tax8 * 100)/TAX_RATE_8);

		int taxExclude_max = 0;
		if( ((tax8 + 1)*100)%8 == 0 ) {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		}	else {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		}

//		System.out.println(taxExclude_min + " " + taxExclude_max);

		int taxExclude_fix = -1;
		for( int val = taxExclude_min; val <= taxExclude_max; val++) {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		}
		System.out.println(taxExclude_fix);
	} executeTaxIncrease {

		Scanner in = new Scanner(System.in);

		double tax8 = (double)in.nextInt();
		double tax10 = (double)in.nextInt();

		int taxExclude_min = (int)Math.ceil((tax8 * 100)/TAX_RATE_8);

		int taxExclude_max = 0;
		if( ((tax8 + 1)*100)%8 == 0 ) {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		}	else {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		}

//		System.out.println(taxExclude_min + " " + taxExclude_max);

		int taxExclude_fix = -1;
		for( int val = taxExclude_min; val <= taxExclude_max; val++) {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		}
		System.out.println(taxExclude_fix);
	} Scanner in = new Scanner(System.in); in new Scanner(System.in) double tax8 = (double)in.nextInt(); tax8 (double)in.nextInt() in.nextInt in double tax10 = (double)in.nextInt(); tax10 (double)in.nextInt() in.nextInt in int taxExclude_min = (int)Math.ceil((tax8 * 100)/TAX_RATE_8); taxExclude_min (int)Math.ceil((tax8 * 100)/TAX_RATE_8) Math.ceil Math (tax8 * 100)/TAX_RATE_8 (tax8 * 100) tax8 100 TAX_RATE_8 int taxExclude_max = 0; taxExclude_max 0 if( ((tax8 + 1)*100)%8 == 0 ) {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		}	else {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		} ((tax8 + 1)*100)%8 == 0 ((tax8 + 1)*100)%8 ((tax8 + 1)*100) (tax8 + 1) tax8 1 100 8 0 {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		} taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1) taxExclude_max (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1) ((tax8 + 1) * 100)/TAX_RATE_8 ((tax8 + 1) * 100) (tax8 + 1) tax8 1 100 TAX_RATE_8 1 {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		} taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8) taxExclude_max (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8) Math.floor Math ((tax8 + 1) * 100)/TAX_RATE_8 ((tax8 + 1) * 100) (tax8 + 1) tax8 1 100 TAX_RATE_8 int taxExclude_fix = -1; taxExclude_fix -1 1 for( int val = taxExclude_min; val <= taxExclude_max; val++) {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		} int val = taxExclude_min; int val = taxExclude_min; val taxExclude_min val <= taxExclude_max val taxExclude_max val++ val++ val {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		} {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		} if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			} (int)Math.ceil(val/TAX_TATE_10) == tax10 (int)Math.ceil(val/TAX_TATE_10) Math.ceil Math val/TAX_TATE_10 val TAX_TATE_10 tax10 {
				taxExclude_fix = val;
				break;
			} taxExclude_fix = val taxExclude_fix val break; System.out.println(taxExclude_fix) System.out.println System.out System System.out taxExclude_fix public class Main {

	public static void main(String[] args) {
//		executeCountBalls();
		executeTaxIncrease();
	}

	private static void execute() {

		Scanner in = new Scanner(System.in);

		try {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		}

	}

	public static void execute_product() {

		Scanner in = new Scanner(System.in);

		try {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}

	public static void executeCountBalls() {
		Scanner in = new Scanner(System.in);

		try {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}


	public static final int TAX_RATE_8 = 8;
	public static final int TAX_TATE_10 = 10;

	public static void executeTaxIncrease(){

		Scanner in = new Scanner(System.in);

		double tax8 = (double)in.nextInt();
		double tax10 = (double)in.nextInt();

		int taxExclude_min = (int)Math.ceil((tax8 * 100)/TAX_RATE_8);

		int taxExclude_max = 0;
		if( ((tax8 + 1)*100)%8 == 0 ) {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		}	else {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		}

//		System.out.println(taxExclude_min + " " + taxExclude_max);

		int taxExclude_fix = -1;
		for( int val = taxExclude_min; val <= taxExclude_max; val++) {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		}
		System.out.println(taxExclude_fix);
	}

} public class Main {

	public static void main(String[] args) {
//		executeCountBalls();
		executeTaxIncrease();
	}

	private static void execute() {

		Scanner in = new Scanner(System.in);

		try {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		}

	}

	public static void execute_product() {

		Scanner in = new Scanner(System.in);

		try {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}

	public static void executeCountBalls() {
		Scanner in = new Scanner(System.in);

		try {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}


	public static final int TAX_RATE_8 = 8;
	public static final int TAX_TATE_10 = 10;

	public static void executeTaxIncrease(){

		Scanner in = new Scanner(System.in);

		double tax8 = (double)in.nextInt();
		double tax10 = (double)in.nextInt();

		int taxExclude_min = (int)Math.ceil((tax8 * 100)/TAX_RATE_8);

		int taxExclude_max = 0;
		if( ((tax8 + 1)*100)%8 == 0 ) {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		}	else {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		}

//		System.out.println(taxExclude_min + " " + taxExclude_max);

		int taxExclude_fix = -1;
		for( int val = taxExclude_min; val <= taxExclude_max; val++) {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		}
		System.out.println(taxExclude_fix);
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
//		executeCountBalls();
		executeTaxIncrease();
	}

	private static void execute() {

		Scanner in = new Scanner(System.in);

		try {
			String s1 = in.nextLine();
			String s2 = in.nextLine();
			String s3 = in.nextLine();

			int  a = Integer.parseInt(s1);
			String[] s2Array = s2.split(" ");
			int b = Integer.parseInt(s2Array[0]);
			int c = Integer.parseInt(s2Array[1]);

			int sum  = a + b + c;

//			System.out.println(a + "," + b + "," + c );

			System.out.println(sum + " " + s3);
		} catch (NumberFormatException e) {
			// TODO 自動生成された catch ブロック
			System.out.println("");
//			e.printStackTrace();
		}

	}

	public static void execute_product() {

		Scanner in = new Scanner(System.in);

		try {
			int a  = in.nextInt();
			int b  = in.nextInt();

			if( (a*b)%2 == 0 ) {
				System.out.println("Even");
			} else {
				System.out.println("Odd");
			}
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}

	public static void executeCountBalls() {
		Scanner in = new Scanner(System.in);

		try {
			long N = in.nextLong();
			long A = in.nextLong();
			long B = in.nextLong();

			long surplus = N%(A+B);
			long surplusA = surplus >= A ? A : surplus;

			 long countA = N/(A+B) * A + surplusA;

			System.out.println(countA);
		} catch (Exception e) {
			// TODO 自動生成された catch ブロック
			e.printStackTrace();
		}
	}


	public static final int TAX_RATE_8 = 8;
	public static final int TAX_TATE_10 = 10;

	public static void executeTaxIncrease(){

		Scanner in = new Scanner(System.in);

		double tax8 = (double)in.nextInt();
		double tax10 = (double)in.nextInt();

		int taxExclude_min = (int)Math.ceil((tax8 * 100)/TAX_RATE_8);

		int taxExclude_max = 0;
		if( ((tax8 + 1)*100)%8 == 0 ) {
			taxExclude_max = (int)(((tax8 + 1) * 100)/TAX_RATE_8 - 1);
		}	else {
			taxExclude_max = (int)Math.floor(((tax8 + 1) * 100)/TAX_RATE_8);
		}

//		System.out.println(taxExclude_min + " " + taxExclude_max);

		int taxExclude_fix = -1;
		for( int val = taxExclude_min; val <= taxExclude_max; val++) {
			if ( (int)Math.ceil(val/TAX_TATE_10) == tax10 ) {
				taxExclude_fix = val;
				break;
			}
		}
		System.out.println(taxExclude_fix);
	}

}
