#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m,k,i,j,a[1005][6],z=0,r=0;
	cin>>n>>m>>k;
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			cin>>a[i][j];
		}
	}
	for(i=0;i<n;i++){
		for(j=0;j<m;j++){
			z+=a[i][j];
		}
		if(z>=k){
			r++;
		}
		z=0;
	}
    cout<<r;
}
/**************************************************************
	Problem: 2026
	User: chenmingyu
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/