Submission #15782

#	Time	Username	Problem	Language	Result	Execution time	Memory
15782		gs13068	Art Class (IOI13_artclass)	C++98	100 / 100	158 ms	3580 KiB

artclass

#include "artclass.h"
#include <cmath>

int style(int H,int W,int R[500][500],int G[500][500],int B[500][500])
{
	double diff=0,border=0;
    int i,j;
    for(i=0;i<H;i++)for(j=0;j<W;j++)
    {
        if(i)diff+=pow(R[i][j]-R[i-1][j],2)+pow(G[i][j]-G[i-1][j],2)+pow(B[i][j]-B[i-1][j],2);
        if(j)diff+=pow(R[i][j]-R[i][j-1],2)+pow(G[i][j]-G[i][j-1],2)+pow(B[i][j]-B[i][j-1],2);
    }
    diff/=W*(H-1)+(W-1)*H;
    for(i=0;i<H;i++)for(j=0;j<W;j++)
    {
        if(i&&pow(R[i][j]-R[i-1][j],2)+pow(G[i][j]-G[i-1][j],2)+pow(B[i][j]-B[i-1][j],2)>diff)border+=1;
        if(j&&pow(R[i][j]-R[i][j-1],2)+pow(G[i][j]-G[i][j-1],2)+pow(B[i][j]-B[i][j-1],2)>diff)border+=1;
    }
    diff=sqrt(diff);
    border/=W*(H-1)+(W-1)*H;
    if(diff<13.5)return 4;
    if(border<0.18)return 1;
    if(diff>39)return 3;
    return 2;
}

• Subtask 1: 100 / 100