长沙网预赛 2013 C Color Representation Conversion BY hyoga

垒代码的模拟题。容易WA

做题目注意两点：

1.全部用double做，最后round

2.c++里面有实数的mod：fmod

然后就AC了。

总之以后这种恶心的模拟题还是全部用实数做吧……

#include<iostream>
#include<cstring>
#include<cstdio>
#include<string>
#include<cmath>
#include<algorithm>
#include<cstdlib>
using namespace std;
const double eps=1e-10;
struct rec
{
    double a,b,c;//r g b //h s l//h s v
};
int dcmp(double a,double b)
{
    double x=a-b;
    if(fabs(x)<eps)return 0;else return x<0?-1:1;
}
double fmax(double a,double b,double c)
{
    double tmp=a;
    if(b>tmp)tmp=b;
    if(c>tmp)tmp=c;
    return tmp;
}
double fmin(double a,double b,double c)
{
    double tmp=a;
    if(b<tmp)tmp=b;
    if(c<tmp)tmp=c;
    return tmp;
}

rec RGBTOHSL(rec val)
{
    double r=val.a,g=val.b,b=val.c;
    double max=fmax(r,g,b);
    double min=fmin(r,g,b);
    double h=0,s=0,l=0;
    //h
    if(dcmp(max,min)==0)
        h=0;
    else if(dcmp(max,r)==0 && dcmp(g,b)>=0)
        h=60*(g-b)/(max-min);
    else if(dcmp(max,r)==0 && dcmp(g,b)<0)
        h=60*(g-b)/(max-min)+360.0;
    else if(dcmp(max,g)==0)
        h=60*(b-r)/(max-min)+120.0;
    else if(dcmp(max,b)==0)
        h=60*(r-g)/(max-min)+240.0;
    //l
    l=(max+min)/2;
    //s
    if(dcmp(l,0)==0 || dcmp(max,min)==0)
        s=0;
    else if(dcmp(l,0.5)<=0)
        s=(max-min)/(2*l);
    else if(dcmp(l,0.5)>0)
        s=(max-min)/(2.0-2.0*l);

    rec tmp;
    tmp.a=h;tmp.b=s;tmp.c=l;
    return tmp;
}
rec RGBTOHSV(rec val)
{
    double r=val.a,g=val.b,b=val.c;
    double max=fmax(r,g,b);
    double min=fmin(r,g,b);
    double h=0,s=0,v=0;
    //h
    if(dcmp(max,min)==0)
        h=0;
    else if(dcmp(max,r)==0 && dcmp(g,b)>=0)
        h=60*(g-b)/(max-min);
    else if(dcmp(max,r)==0 && dcmp(g,b)<0)
        h=60*(g-b)/(max-min)+360.0;
    else if(dcmp(max,g)==0)
        h=60*(b-r)/(max-min)+120.0;
    else if(dcmp(max,b)==0)
        h=60*(r-g)/(max-min)+240.0;
    //s
    if(dcmp(max,0)==0)
        s=0;
    else
        s=(max-min)/max;
    //V
    v=max;
    rec tmp;
    tmp.a=h;tmp.b=s;tmp.c=v;
    return tmp;
}
rec HSVTORGB(rec val)
{
    double h=val.a,s=val.b,v=val.c;
    double c=v*s;
    h=h/60;
    double x=c*(1-fabs(fmod(h,2)-1));
    double r1=0,g1=0,b1=0;
    if(dcmp(h,0)>=0 && dcmp(h,1)<0)
    {
        r1=c;g1=x;b1=0;
    }
    else if(dcmp(h,1)>=0 && dcmp(h,2)<0)
    {
        r1=x;g1=c;b1=0;
    }
    else if(dcmp(h,2)>=0 && dcmp(h,3)<0)
    {
        r1=0;g1=c;b1=x;
    }
    else if(dcmp(h,3)>=0 && dcmp(h,4)<0)
    {
        r1=0;g1=x;b1=c;
    }
    else if(dcmp(h,4)>=0 && dcmp(h,5)<0)
    {
        r1=x;g1=0;b1=c;
    }
    else if(dcmp(h,5)>=0 && dcmp(h,6)<0)
    {
        r1=c;g1=0;b1=x;
    }
    double m=v-c;
    rec tmp;
    tmp.a=r1+m;tmp.b=g1+m;tmp.c=b1+m;
    return tmp;
}
rec HSLTORGB(rec val)
{
    double h=val.a,s=val.b,l=val.c;
    double c=(1-fabs(2*l-1))*s;
    h=h/60;
    double x=c*(1-fabs(fmod(h,2)-1));
    double r1=0,g1=0,b1=0;
    if(dcmp(h,0)>=0 && dcmp(h,1)<0)
    {
        r1=c;g1=x;b1=0;
    }
    else if(dcmp(h,1)>=0 && dcmp(h,2)<0)
    {
        r1=x;g1=c;b1=0;
    }
    else if(dcmp(h,2)>=0 && dcmp(h,3)<0)
    {
        r1=0;g1=c;b1=x;
    }
    else if(dcmp(h,3)>=0 && dcmp(h,4)<0)
    {
        r1=0;g1=x;b1=c;
    }
    else if(dcmp(h,4)>=0 && dcmp(h,5)<0)
    {
        r1=x;g1=0;b1=c;
    }
    else if(dcmp(h,5)>=0 && dcmp(h,6)<0)
    {
        r1=c;g1=0;b1=x;
    }
    double m=l-0.5*c;
    rec tmp;
    tmp.a=r1+m;tmp.b=g1+m;tmp.c=b1+m;
    return tmp;
}

int main()
{
    //freopen("data","r",stdin);
    string str_target;
    while(cin>>str_target)
    {
        string str_ori;
        rec ans,val;

        cin>>str_ori;
        if(str_ori=="RGB")
        {
            scanf("%lf%lf%lf",&val.a,&val.b,&val.c);
            val.a/=255;
            val.b/=255;
            val.c/=255;

            if(str_target=="HSL")
                ans=RGBTOHSL(val);
            else if(str_target=="HSV")
                ans=RGBTOHSV(val);
            else
                ans=val;
        }
        else if(str_ori=="HSL")
        {
            scanf("%lf %lf%% %lf%%",&val.a,&val.b,&val.c);
            val.b/=100;val.c/=100;
            if(str_target=="RGB")
                ans=HSLTORGB(val);
            else if(str_target=="HSV")
                ans=RGBTOHSV(HSLTORGB(val));
            else
                ans=val;
        }
        else if(str_ori=="HSV")
        {
            scanf("%lf %lf%% %lf%%",&val.a,&val.b,&val.c);
            val.b/=100;val.c/=100;
            if(str_target=="RGB")
                ans=HSVTORGB(val);
            else if(str_target=="HSL")
                ans=RGBTOHSL(HSVTORGB(val));
            else
                ans=val;
        }

        //output
        cout<<str_target<<" ";
        if(str_target=="RGB")
        {
            int a=round(ans.a*255),b=round(ans.b*255),c=round(ans.c*255);
            printf("%d %d %d\n",a,b,c);
        }
        else
        {
            int a=round(ans.a),b=round(ans.b*100),c=round(ans.c*100);
            printf("%d %d%% %d%%\n",a,b,c);
        }
    }
    return 0;
}