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

/**************************************************************
	Problem: 2026
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/