
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		int numH = 0;
		int numW = 0;
		int h = 0;
		int w = 0;

		try {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numN = 0;
		int numM = 0;
		int numC = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		int numH = 0;
		int numW = 0;
		int h = 0;
		int w = 0;

		try {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numN = 0;
		int numM = 0;
		int numC = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
} Main public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	} main {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	} new Main().solveB() new Main().solveB new Main() String[] args args private void solveA() {
		Scanner scanner = null;
		int numH = 0;
		int numW = 0;
		int h = 0;
		int w = 0;

		try {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} solveA {
		Scanner scanner = null;
		int numH = 0;
		int numW = 0;
		int h = 0;
		int w = 0;

		try {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} Scanner scanner = null; scanner null int numH = 0; numH 0 int numW = 0; numW 0 int h = 0; h 0 int w = 0; w 0 try {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		} {
			if (scanner != null) {
				scanner.close();
			}
		} if (scanner != null) {
				scanner.close();
			} scanner != null scanner null {
				scanner.close();
			} scanner.close() scanner.close scanner {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} scanner = new Scanner(System.in) scanner new Scanner(System.in) numH = scanner.nextInt() numH scanner.nextInt() scanner.nextInt scanner numW = scanner.nextInt() numW scanner.nextInt() scanner.nextInt scanner h = scanner.nextInt() h scanner.nextInt() scanner.nextInt scanner w = scanner.nextInt() w scanner.nextInt() scanner.nextInt scanner int total = numH * numW; total numH * numW numH numW int col = h * numW; col h * numW h numW int row = w * (numH - h); row w * (numH - h) w (numH - h) numH h System.out.println(total - col - row) System.out.println System.out System System.out total - col - row total - col - row total col row private void solveB() {
		Scanner scanner = null;
		int numN = 0;
		int numM = 0;
		int numC = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} solveB {
		Scanner scanner = null;
		int numN = 0;
		int numM = 0;
		int numC = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} Scanner scanner = null; scanner null int numN = 0; numN 0 int numM = 0; numM 0 int numC = 0; numC 0 try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		} {
			if (scanner != null) {
				scanner.close();
			}
		} if (scanner != null) {
				scanner.close();
			} scanner != null scanner null {
				scanner.close();
			} scanner.close() scanner.close scanner {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} scanner = new Scanner(System.in) scanner new Scanner(System.in) numN = scanner.nextInt() numN scanner.nextInt() scanner.nextInt scanner numM = scanner.nextInt() numM scanner.nextInt() scanner.nextInt scanner numC = scanner.nextInt() numC scanner.nextInt() scanner.nextInt scanner int[] bArray = new int[numM]; bArray new int[numM] numM int[][] aArray = new int[numN][numM]; aArray new int[numN][numM] numN numM for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			} int i = 0; int i = 0; i 0 i < bArray.length i bArray.length bArray bArray.length i++ i++ i {
				bArray[i] = scanner.nextInt();

			} {
				bArray[i] = scanner.nextInt();

			} bArray[i] = scanner.nextInt() bArray[i] bArray i scanner.nextInt() scanner.nextInt scanner for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			} int i = 0; int i = 0; i 0 i < aArray.length i aArray.length aArray aArray.length i++ i++ i {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			} {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			} for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				} int j = 0; int j = 0; j 0 j < aArray[i].length j aArray[i].length aArray[i] aArray i aArray[i].length j++ j++ j {
					aArray[i][j] = scanner.nextInt();
				} {
					aArray[i][j] = scanner.nextInt();
				} aArray[i][j] = scanner.nextInt() aArray[i][j] aArray[i] aArray i j scanner.nextInt() scanner.nextInt scanner int cnt = 0; cnt 0 for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			} int i = 0; int i = 0; i 0 i < aArray.length i aArray.length aArray aArray.length i++ i++ i {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			} {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			} int res = 0; res 0 for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				} int j = 0; int j = 0; j 0 j < aArray[i].length j aArray[i].length aArray[i] aArray i aArray[i].length j++ j++ j {
					res += (aArray[i][j] * bArray[j]);
				} {
					res += (aArray[i][j] * bArray[j]);
				} res += (aArray[i][j] * bArray[j]) res (aArray[i][j] * bArray[j]) aArray[i][j] aArray[i] aArray i j bArray[j] bArray j if (res + numC > 0) {
					cnt++;
				} res + numC > 0 res + numC res numC 0 {
					cnt++;
				} cnt++ cnt System.out.println(cnt) System.out.println System.out System System.out cnt private void solveC() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} solveC {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} Scanner scanner = null; scanner null int numN = 0; numN 0 int numK = 0; numK 0 int numS = 0; numS 0 try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		} {
			if (scanner != null) {
				scanner.close();
			}
		} if (scanner != null) {
				scanner.close();
			} scanner != null scanner null {
				scanner.close();
			} scanner.close() scanner.close scanner {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} scanner = new Scanner(System.in) scanner new Scanner(System.in) numN = scanner.nextInt() numN scanner.nextInt() scanner.nextInt scanner System.out.println("") System.out.println System.out System System.out "" private void solveD() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} solveD {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} Scanner scanner = null; scanner null int numN = 0; numN 0 int numK = 0; numK 0 int numS = 0; numS 0 try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		} {
			if (scanner != null) {
				scanner.close();
			}
		} if (scanner != null) {
				scanner.close();
			} scanner != null scanner null {
				scanner.close();
			} scanner.close() scanner.close scanner {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} scanner = new Scanner(System.in) scanner new Scanner(System.in) numN = scanner.nextInt() numN scanner.nextInt() scanner.nextInt scanner System.out.println("") System.out.println System.out System System.out "" public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		int numH = 0;
		int numW = 0;
		int h = 0;
		int w = 0;

		try {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numN = 0;
		int numM = 0;
		int numC = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
} public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		int numH = 0;
		int numW = 0;
		int h = 0;
		int w = 0;

		try {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numN = 0;
		int numM = 0;
		int numC = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
} Main

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		int numH = 0;
		int numW = 0;
		int h = 0;
		int w = 0;

		try {
			scanner = new Scanner(System.in);
			numH = scanner.nextInt();
			numW = scanner.nextInt();
			h = scanner.nextInt();
			w = scanner.nextInt();

			int total = numH * numW;
			int col = h * numW;
			int row = w * (numH - h);
			System.out.println(total - col - row);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numN = 0;
		int numM = 0;
		int numC = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();
			numM = scanner.nextInt();
			numC = scanner.nextInt();
			int[] bArray = new int[numM];
			int[][] aArray = new int[numN][numM];

			for (int i = 0; i < bArray.length; i++) {
				bArray[i] = scanner.nextInt();

			}
			for (int i = 0; i < aArray.length; i++) {
				for (int j = 0; j < aArray[i].length; j++) {
					aArray[i][j] = scanner.nextInt();
				}
			}
			int cnt = 0;

			for (int i = 0; i < aArray.length; i++) {
				int res = 0;
				for (int j = 0; j < aArray[i].length; j++) {
					res += (aArray[i][j] * bArray[j]);
				}
				if (res + numC > 0) {
					cnt++;
				}
			}

			System.out.println(cnt);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int numN = 0;
		int numK = 0;
		int numS = 0;

		try {
			scanner = new Scanner(System.in);
			numN = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
}