View Code of Problem 13

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main (){
	int h, a, b, k, cnt = 0;
	while(~scanf("%d%d%d%d", &h, &a, &b, &k)){
		int flag = 0;
		for(int i = 0;i < k;i++){
			h -= a;
			if(h<1){
				flag = 1;
				break;
			}
			else h += b;
		}
		if(flag) printf("Case #%d: White win\n", ++cnt);
		else printf("Case #%d: Unknow\n", ++cnt);
	}

	return 0;
}