Submission #1217373

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217373		omsincoconut	Art Class (IOI13_artclass)	C++20	83 / 100	41 ms	3352 KiB

artclass

#include "artclass.h"
#include <bits/stdc++.h>
using namespace std;

double takepw(double x) {return pow(x, 0.5);}

double difference_mean(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
    double sum = 0;
    for (int i = 1; i < H; i++) {
        for (int j = 1; j < W; j++) {
            sum += takepw(0.299*abs(R[i][j]-R[i-1][j]) + 0.587*abs(G[i][j]-G[i-1][j]) + 0.114*abs(B[i][j]-B[i-1][j]));
            sum += takepw(0.299*abs(R[i][j]-R[i][j-1]) + 0.587*abs(G[i][j]-G[i][j-1]) + 0.114*abs(B[i][j]-B[i][j-1]));
        }
    }
    return sum/(H*W);
}

double info[5][2] = {
    {0,0},
    {3.464, 0.929},
    {5.773, 0.956},
    {9.450, 1.435},
    {2.169, 0.546}
};

int style(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
    double df = difference_mean(H, W, R, G, B);

    double cv = 1e9;
    int ret = 0;
    for (int i = 1; i <= 4; i++) {
        double v = (double)abs(df-info[i][0])/info[i][1];
        if (v < cv) {
            cv = v;
            ret = i;
        }
    }

    return ret;
}

• Subtask 1: 82.7941 / 100