import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        
        int[] B =new int[M];
        int[][] A = new int[N][M];
        
        for(int i=0;i<M;i++){
            B[i] =sc.nextInt();
        }
        
        for(int i=0; i<N; i++){
            for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            }
        }
        int cou = 0;
		for(int i=0; i<N; i++) {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		}
		System.out.println(cou);
        
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        
        int[] B =new int[M];
        int[][] A = new int[N][M];
        
        for(int i=0;i<M;i++){
            B[i] =sc.nextInt();
        }
        
        for(int i=0; i<N; i++){
            for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            }
        }
        int cou = 0;
		for(int i=0; i<N; i++) {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		}
		System.out.println(cou);
        
    }
} Main public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        
        int[] B =new int[M];
        int[][] A = new int[N][M];
        
        for(int i=0;i<M;i++){
            B[i] =sc.nextInt();
        }
        
        for(int i=0; i<N; i++){
            for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            }
        }
        int cou = 0;
		for(int i=0; i<N; i++) {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		}
		System.out.println(cou);
        
    } main {
        
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        
        int[] B =new int[M];
        int[][] A = new int[N][M];
        
        for(int i=0;i<M;i++){
            B[i] =sc.nextInt();
        }
        
        for(int i=0; i<N; i++){
            for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            }
        }
        int cou = 0;
		for(int i=0; i<N; i++) {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		}
		System.out.println(cou);
        
    } 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[] B =new int[M]; B new int[M] M int[][] A = new int[N][M]; A new int[N][M] N M for(int i=0;i<M;i++){
            B[i] =sc.nextInt();
        } int i=0; int i=0; i 0 i<M i M i++ i++ i {
            B[i] =sc.nextInt();
        } {
            B[i] =sc.nextInt();
        } B[i] =sc.nextInt() B[i] B i sc.nextInt() sc.nextInt sc for(int i=0; i<N; i++){
            for(int j=0;j<M;j++){
                A[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++){
                A[i][j] =sc.nextInt();
            }
        } {
            for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            }
        } for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            } int j=0; int j=0; j 0 j<M j M j++ j++ j {
                A[i][j] =sc.nextInt();
            } {
                A[i][j] =sc.nextInt();
            } A[i][j] =sc.nextInt() A[i][j] A[i] A i j sc.nextInt() sc.nextInt sc int cou = 0; cou 0 for(int i=0; i<N; i++) {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		} {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		} int al = 0; al 0 for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			} int j=0; int j=0; j 0 j<M j M j++ j++ j {
				al += A[i][j]*B[j];
			} {
				al += A[i][j]*B[j];
			} al += A[i][j]*B[j] al A[i][j]*B[j] A[i][j] A[i] A i j B[j] B j if(al+C>0) {
					cou++;
				} al+C>0 al+C al C 0 {
					cou++;
				} cou++ cou System.out.println(cou) System.out.println System.out System System.out cou String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        
        int[] B =new int[M];
        int[][] A = new int[N][M];
        
        for(int i=0;i<M;i++){
            B[i] =sc.nextInt();
        }
        
        for(int i=0; i<N; i++){
            for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            }
        }
        int cou = 0;
		for(int i=0; i<N; i++) {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		}
		System.out.println(cou);
        
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        
        int[] B =new int[M];
        int[][] A = new int[N][M];
        
        for(int i=0;i<M;i++){
            B[i] =sc.nextInt();
        }
        
        for(int i=0; i<N; i++){
            for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            }
        }
        int cou = 0;
		for(int i=0; i<N; i++) {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		}
		System.out.println(cou);
        
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int M = sc.nextInt();
        int C = sc.nextInt();
        
        int[] B =new int[M];
        int[][] A = new int[N][M];
        
        for(int i=0;i<M;i++){
            B[i] =sc.nextInt();
        }
        
        for(int i=0; i<N; i++){
            for(int j=0;j<M;j++){
                A[i][j] =sc.nextInt();
            }
        }
        int cou = 0;
		for(int i=0; i<N; i++) {
			int al = 0;
			for(int j=0; j<M; j++) {
				al += A[i][j]*B[j];
			}
				if(al+C>0) {
					cou++;
				}				
		}
		System.out.println(cou);
        
    }
}
