#include <iostream>
using namespace std;

int main() {
    int n, m, k;
    cin >> n >> m >> k;
    int count = 0;

    for (int i = 0; i < n; i++) {
        int total_score = 0;
        for (int j = 0; j < m; j++) {
            int score;
            cin >> score;
            total_score += score;
        }
        if (total_score >= k) {
            count++;
        }
    }

    cout << count << endl;
    return 0;
}    
/**************************************************************
	Problem: 2026
	User: fuyijun
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/