#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m,k,s=0,c=0;
	int a[2000][10];
	cin>>n>>m>>k;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			cin>>a[i][j];
		}
	}
	for(int i=1;i<=n;i++){
		s=0;
		for(int j=1;j<=m;j++){
			s=s+a[i][j];
		}
		if(s>=k) c++;
	}
	cout<<c;
	return 0;
}

/**************************************************************
	Problem: 2026
	User: lidongcheng
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/