Submission #1182138

#	Time	Username	Problem	Language	Result	Execution time	Memory
1182138		omsincoconut	Art Class (IOI13_artclass)	C++20	81 / 100	31 ms	3316 KiB

artclass

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

double green_avg(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
    long long gs = 0;
    for (int i = 0; i < H; i++) {
        for (int j = 0; j < W; j++) {
            gs += (G[i][j] >= max(R[i][j], B[i][j]));
        }
    }
    return (double)(gs)/(H*W);
}

double difference_mean(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
    long long rs = 0, gs = 0, bs = 0;
    for (int i = 1; i < H; i++) {
        for (int j = 1; j < W; j++) {
            rs += abs(R[i][j] - R[i-1][j]) + abs(R[i][j] - R[i][j-1]);
            gs += abs(G[i][j] - G[i-1][j]) + abs(G[i][j] - G[i][j-1]);
            bs += abs(B[i][j] - B[i-1][j]) + abs(B[i][j] - B[i][j-1]);
        }
    }
    return (double)(rs+gs+bs)/(H*W);
}

double info[5][2] = {
    {0,0},
    {35.27, 11.05},
    {63.60, 15.41},
    {172.30, 40.79},
    {11.46, 2.27}
};

int style(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
    double green = green_avg(H, W, R, G, B);
    if (green > 0.6) return 2;
    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: 80.5882 / 100