#include<bits/stdc++.h>
using namespace std;
int main(){
    int a[1005][10],n,i,j,h=0,m,x,r=0;
    cin>>n>>m>>x;
    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]+h;	
    	}
	    if(h>=x){
           r++;
	    }
	    h=0;
    }
    cout<<r;
}
/**************************************************************
	Problem: 2026
	User: lijinkai
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/