import java.util.*;

class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int codeNum = sc.nextInt();
        int statusNum = sc.nextInt();
        int passScore = -sc.nextInt();

        int[] coefficient = new int[statusNum];
        for(int i  = 0; i < statusNum; i++)coefficient[i] = sc.nextInt();
        
        int ans = 0;
        for(int i = 0; i < codeNum; i++){
            int score = 0;
            for(int j  = 0; j < statusNum; j++){
                score += coefficient[j] * sc.nextInt();
            }
            if(score > passScore)ans++;
        }

        System.out.println(ans);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz