#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;
}
/**************************************************************
	Problem: 2026
	User: chenmingyu
	Language: C++
	Result: Compile Error
****************************************************************/