//kaihatsu
#include <bits/stdc++.h>

using namespace std;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin >> n;
	int x = 1e9;
	for (int i = 1; i <= x; ++i) {
		int sum = (i * (i + 1)) / 2;
		if (sum >= n) {
			cout << i;
			break;
		}
	}
	return 0;
}	

#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using ll = long long;
using namespace std;
using P = pair<int,int>;

int main(){
    int n;
    cin >> n;
    if(n%2 == 0) cout << "White" << endl;
    else cout << "Black" << endl;
    return 0;
}