#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: suzihang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/