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

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