#include <iostream>
#include <iomanip>  
using namespace std;
int main() {
    int a[100][100],n,m,i,j,sun,f,jing=0;
    cin>>n>>m>>f;
    for(i=0;i<n;i++){
    	sun=0;
    	for(j=0;j<m;j++){		
    		cin>>a[i][j];
    		sun=sun+a[i][j];
    	}
    	if(sun>=f){
    		jing++;	
    	}
    }
   cout<<jing; 
}
/**************************************************************
	Problem: 2026
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/