简单题

#include 
      
       #include 
       
        #include 
        
         #include 
         
          using namespace std;int a, b, c, d;int cal(int a){    return (a + 40) % 40;}int main(){    while (scanf("%d%d%d%d", &a, &b, &c, &d), a | b | c | d)    {        int ans = cal(a - b) + cal(c - b) + cal(c - d) + 120;        ans *= 9;        printf("%d\n", ans);    }    return 0;}