Tick and Tick

#include"iostream"
using namespace std;
inline double max(double a,double b,double c)
{
    a=a>b?a:b;
    a=a>c?a:c;
    return a;
}
inline double min(double a,double b,double c)
{
    a=a<b?a:b;
    a=a<c?a:c;
    return a;
}
int main()
{
    double an;
    double tsm[1445],tsh[1445],tmh[26];
    double s,m,h;
    s=3600.00/59;//周期结束点
    m=43200.00/719;
    h=43200.00/11;
    while(cin>>an&&an!=-1)
    {
        tsm[0]=(10*an)/59;
        tsh[0]=(120*an)/719;
        tmh[0]=(120*an)/11;
        tsm[1]=s-tsm[0];
        tsh[1]=m-tsh[0];
        tmh[1]=h-tmh[0];
        double sum=0;
        double x=0,y=0;
        int i,j;
        for(i=2,j=3;;i+=2,j+=2)
        {
            tsm[i]=tsm[i-2]+s;
            tsm[j]=tsm[j-2]+s;
            if(tsm[i]>43200&&tsm[j]>43200)
               break;
        }
        for(i=2,j=3;;i+=2,j+=2)
        {
            tsh[i]=tsh[i-2]+m;
            tsh[j]=tsh[j-2]+m;
            if(tsh[i]>43200&&tsh[j]>43200)
                break;
        }
        for(i=2,j=3;;i+=2,j+=2)
        {
            tmh[i]=tmh[i-2]+h;
            tmh[j]=tmh[j-2]+h;
            if(tmh[i-2]>43200&&tmh[j]>43200)
               break;
        }
        int a[2],b[2],c[2];
        a[0]=b[0]=c[0]=0;
        a[1]=b[1]=c[1]=1;
        while(x<=43200&&y<=43200)
        {
            x=max(tsm[a[0]],tsh[b[0]],tmh[c[0]]);
            y=min(tsm[a[1]],tsh[b[1]],tmh[c[1]]);
            if(x<y)
               sum+=(y-x);
            if(y==tsm[a[1]])
            {
                a[0]+=2;
                a[1]+=2;
            }   
            if(y==tsh[b[1]])
            {
                b[0]+=2;
                b[1]+=2;
            }
            if(y==tmh[c[1]])
            {
                c[0]+=2;
                c[1]+=2;
            }
        }
        cout.precision(3);
        cout<<fixed<<sum/432<<endl;
    }
    return 0;
}