import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();

		int[] bArray = new int[M];
		for(int i=0; i<M; i++) {
			bArray[i] = sc.nextInt();
		}


		int[][] aArray = new int[N][M];

		for(int i=0; i<N; i++) {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		}

		int ans = 0;

		for(int i=0; i<N; i++) {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		}

		System.out.println(ans);
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();

		int[] bArray = new int[M];
		for(int i=0; i<M; i++) {
			bArray[i] = sc.nextInt();
		}


		int[][] aArray = new int[N][M];

		for(int i=0; i<N; i++) {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		}

		int ans = 0;

		for(int i=0; i<N; i++) {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		}

		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();

		int[] bArray = new int[M];
		for(int i=0; i<M; i++) {
			bArray[i] = sc.nextInt();
		}


		int[][] aArray = new int[N][M];

		for(int i=0; i<N; i++) {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		}

		int ans = 0;

		for(int i=0; i<N; i++) {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		}

		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();

		int[] bArray = new int[M];
		for(int i=0; i<M; i++) {
			bArray[i] = sc.nextInt();
		}


		int[][] aArray = new int[N][M];

		for(int i=0; i<N; i++) {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		}

		int ans = 0;

		for(int i=0; i<N; i++) {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		}

		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc int M = sc.nextInt(); M sc.nextInt() sc.nextInt sc int C = sc.nextInt(); C sc.nextInt() sc.nextInt sc int[] bArray = new int[M]; bArray new int[M] M for(int i=0; i<M; i++) {
			bArray[i] = sc.nextInt();
		} int i=0; int i=0; i 0 i<M i M i++ i++ i {
			bArray[i] = sc.nextInt();
		} {
			bArray[i] = sc.nextInt();
		} bArray[i] = sc.nextInt() bArray[i] bArray i sc.nextInt() sc.nextInt sc int[][] aArray = new int[N][M]; aArray new int[N][M] N M for(int i=0; i<N; i++) {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		} {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		} for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			} int j=0; int j=0; j 0 j<M j M j++ j++ j {
				aArray[i][j] = sc.nextInt();
			} {
				aArray[i][j] = sc.nextInt();
			} aArray[i][j] = sc.nextInt() aArray[i][j] aArray[i] aArray i j sc.nextInt() sc.nextInt sc int ans = 0; ans 0 for(int i=0; i<N; i++) {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		} {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		} int result=0; result 0 for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			} int j=0; int j=0; j 0 j<M j M j++ j++ j {
				result += aArray[i][j]*bArray[j];
			} {
				result += aArray[i][j]*bArray[j];
			} result += aArray[i][j]*bArray[j] result aArray[i][j]*bArray[j] aArray[i][j] aArray[i] aArray i j bArray[j] bArray j ans += result + C >0 ? 1 : 0 ans result + C >0 ? 1 : 0 result + C >0 result + C result C 0 1 0 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();

		int[] bArray = new int[M];
		for(int i=0; i<M; i++) {
			bArray[i] = sc.nextInt();
		}


		int[][] aArray = new int[N][M];

		for(int i=0; i<N; i++) {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		}

		int ans = 0;

		for(int i=0; i<N; i++) {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		}

		System.out.println(ans);
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();

		int[] bArray = new int[M];
		for(int i=0; i<M; i++) {
			bArray[i] = sc.nextInt();
		}


		int[][] aArray = new int[N][M];

		for(int i=0; i<N; i++) {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		}

		int ans = 0;

		for(int i=0; i<N; i++) {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		}

		System.out.println(ans);
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		int C = sc.nextInt();

		int[] bArray = new int[M];
		for(int i=0; i<M; i++) {
			bArray[i] = sc.nextInt();
		}


		int[][] aArray = new int[N][M];

		for(int i=0; i<N; i++) {
			for(int j=0; j<M; j++) {
				aArray[i][j] = sc.nextInt();
			}
		}

		int ans = 0;

		for(int i=0; i<N; i++) {
			int result=0;
			for(int j=0; j<M; j++) {
				result += aArray[i][j]*bArray[j];
			}
			ans += result + C >0 ? 1 : 0;
		}

		System.out.println(ans);
	}
}
