#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,m,k,i,j,t,d=0;
	cin>>n>>m>>k;
	int g[100][100];
	for(i=0;i<n;i++){
		t=0;
		for(j=0;j<m;j++){
			cin>>g[i][j];
			t+=g[i][j];
		} 
		if(t>=k){
			d++;
		}
	}
	cout<<d;
	return 0;
}

/**************************************************************
	Problem: 2026
	User: zzz
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/