Submission #518860

#	Time	Username	Problem	Language	Result	Execution time	Memory
518860		SHZhang	Art Class (IOI13_artclass)	C++14	100 / 100	164 ms	8276 KiB

artclass

#include "artclass.h"
#include <cstdio>
#include <algorithm>
#include <vector>

using namespace std;

double dis(int a, int b, int c, int d, int e, int f)
{
    return (double)((a-d)*(a-d) + (b-e)*(b-e) + (c-f)*(c-f));
}

bool used[16][16][16];

int style(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
    double var = 0.0;
    vector<double> varvec;
    for (int i = 0; i < H; i++) {
        for (int j = 0; j < W; j++) {
            //used[R[i][j] / 16][G[i][j] / 16][B[i][j] / 16] = true;
            double tot = 0.0; int cnt = 0;
            for (int k = -5; k <= 5; k++) {
                for (int l = -5; l <= 5; l++) {
                    if (i + k >= 0 && i + k < H && j + l >= 0 && j + l < W) {
                        tot += dis(R[i][j], G[i][j], B[i][j], R[i+k][j+l],
                            G[i+k][j+l], B[i+k][j+l]);
                        cnt++;
                    }
                }
            }
            var += tot / (double)cnt;
            varvec.push_back(tot / (double)cnt);
        }
    }
    sort(varvec.begin(), varvec.end());
    /*int usecnt = 0;
    for (int i = 0; i < 16; i++) {
        for (int j = 0; j < 16; j++) {
            for (int k = 0; k < 16; k++) {
                if (used[i][j][k]) usecnt++;
            }
        }
    }*/
    double varavg = var / (double)(H*W);
    double varlowmed = varvec[(H*W)/3];
    if (varlowmed <= 435.0) {
        if (varavg <= 1400.0) return 4;
        return 1;
    } else {
        if (varlowmed + varavg <= 8000.0) return 2;
        return 3;
    }
}

• Subtask 1: 100 / 100