#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m,i,j,z=0,k,s=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++){
			z+=a[i][j];
		}
		if(z>=k){
			s+=1;
		}
		z=0;
	}
	cout<<s;
}

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