Submission #1313628

#	Time	Username	Problem	Language	Result	Execution time	Memory
1313628		kawhiet	Art Class (IOI13_artclass)	C++20	17 / 100	36 ms	3340 KiB

artclass

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

mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());

int is_4(int n, int m, int r[500][500], int g[500][500], int b[500][500]) {
    int bad = 0;
    for (int i = 1; i < n; i++) {
        int cnt = 1, mx = 1;
        for (int j = 1; j < m; j++) {
            int dist_r = abs(r[i][j] - r[i - 1][j]);
            int dist_g = abs(g[i][j] - g[i - 1][j]);
            int dist_b = abs(b[i][j] - b[i - 1][j]);
            if (max({dist_r, dist_b, dist_g}) > 20) {
                cnt = 1;
            } else {
                cnt++;
            }
            mx = max(mx, cnt);
        }
        if (mx < m / 2) {
            bad++;
        }
    }
    if (bad >= 80) {
        return false;
    } else {
        return true;
    }
}

int is_2(int n, int m, int r[500][500], int g[500][500], int b[500][500]) {
    int cnt = 0;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            int x = r[i][j], y = g[i][j], z = b[i][j];
            if (z <= min(x, y) && y + 20 >= max(x, z)) {
                cnt++;
            }
        }
    }
    // cerr << 100.0 / double(n * m) * double(cnt) << '\n';
    // cerr << cnt * 4 << ' ' << n * m * 10 << '\n';
    if (cnt * 10 > n * m * 3) {
        return true;
    } else {
        return false;
    }
}

int style(int n, int m, int r[500][500], int g[500][500], int b[500][500]) {
    if (is_4(n, m, r, g, b)) return 4;
    if (is_2(n, m, r, g, b)) return 2;
    return 3;
    // return -1;
    // return (rng() % 2) * 2 + 1;
}

• Subtask 1: 16.6176 / 100