View Code of Problem 13

#include<stdio.h>
int main(){
int h,a,b,k,t=1,flag,i;
while(scanf("%d%d%d%d",&h,&a,&b,&k)!=EOF){
printf("Case #%d: ",t++);
flag=0;
for(i=0;i<k;i++){
h-=a;
if(h<1) {
	flag=1;
    break;}
h+=b;
}
if(flag==1) printf("White win\n");
else{
   if(b-(a-b)*k<0) printf("White win\n");
   else printf("Unknow\n");
}
}
}