View Code of Problem 13

#include <stdio.h>

int main(){
	int h,a,b,k,index=1,flag; 
	//输入：4个整数，1<=h,a,b,k<=10^4
	while(scanf("%d %d %d %d", &h, &a, &b, &k)!=EOF){
		flag=0;
		//处理
		for(int i=0; i<k; i++){
			if(h-a>0){
				h = h-a+b;
			}else{
				flag=1;
			}
		}
		//输出：1行字符串
		if(flag==1) printf("Case #%d: White win\n", index++);
		else printf("Case #%d: Unknow\n", index++);
	}
}