UVA 579 - Clock Hands

#include <bits/stdc++.h>
#define FAST ios_base::sync_with_stdio(0)
#define dbug(x) cout<<x<<" "
using namespace std;
int main()
{
    //FAST;
    int hour , minute ;
    double total , h_angle , m_angle;
    while(scanf("%d:%d",&hour,&minute)== 2){
        if(!hour  && !minute)break;
        m_angle = minute/5.0*30.0;
        h_angle = hour*30.0 + minute*30.0/60.0;
        total = fabs(h_angle - m_angle);
        if(total > 180.0 ) total = 360.0 - total;
        printf("%.3f\n",total);
    }
    return 0;
}