poj 2304 Combination Lock

#include <stdio.h>#include <math.h>int main(){int a,b,c,d,cal;while(scanf("%d%d%d%d",&a,&b,&c,&d)!=EOF){if(a==b && b==c && c==d && a==0){break;}else{cal=1080;if(b>=a){cal+=(40-b+a)*9;}else if(b<a){cal= cal+360-(40-a+b)*9;}if(b>=c){cal+=(40-b+c)*9;}else if(b<c){cal= cal+360-(40-c+b)*9;}if(c>=d){cal=cal+360-(40-c+d)*9;}else if(c<d){cal+=(40-d+c)*9;}printf("%dn",cal);}}return(0);}