#include <bits/stdc++.h>
using namespace std;
int main(){
	int i,m,k,n,a[1000][7]={0},j,h=0,z=0;
	cin>>n>>m>>k;
	for(i=0;i<n;i++){
		h=0;
		for(j=0;j<m;j++){
			cin>>a[i][j];
			h=h+a[i][j];
		}
		if(h>=k){
			z++;
		}
	}
	cout<<z;


}

/**************************************************************
	Problem: 2026
	User: jiangyuanfeng
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/