#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fi first
#define se second
const int N=2e5+1;
int n,q;
ll a[N];

int main(){
	ios::sync_with_stdio(false);cin.tie(0);
	int x,y;cin >> x >> y;
	if(x==0 ) cout << "https://www.codechef.com/practice\n";
	else if(x==1 && y==0) cout << "https://www.codechef.com/contests\n";
	else cout << "https://discuss.codechef.com\n";
}