Submission #940647

#	Time	Username	Problem	Language	Result	Execution time	Memory
940647		Der_Vlapos	Art Class (IOI13_artclass)	C++17	0 / 100	57 ms	11380 KiB

artclass

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

#define f first
#define s second
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back

#include "artclass.h"

vector<int> dx = {0, 0, 1, -1};
vector<int> dy = {-1, 1, 0, 0};

vector<vector<int>> was, r, g, b;
int n, m;

bool good(int x, int y)
{
    return x >= 0 and y >= 0 and x < n and y < m;
}

int O = 0;

struct DSU
{
    vector<int> sz, p;

    void init(int n)
    {
        p.resize(n);
        sz.resize(n);
        for (int i = 0; i < n; ++i)
            p[i] = i;
    }

    int getRoot(int v)
    {
        return p[v] == v ? v : p[v] = getRoot(p[v]);
    }

    void merge(int a, int b)
    {
        a = getRoot(a);
        b = getRoot(b);
        if (a == b)
            return;
        sz[a] += sz[b];
        p[b] = a;
    }
};

int style(int H, int W, int R[500][500], int G[500][500], int B[500][500])
{
    r.resize(H + 100, vector<int>(W + 100));
    g.resize(H + 100, vector<int>(W + 100));
    b.resize(H + 100, vector<int>(W + 100));
    n = H;
    m = W;

    for (int i = 0; i < n; ++i)
        for (int j = 0; j < m; ++j)
        {
            r[i][j] = R[i][j];
            g[i][j] = G[i][j];
            b[i][j] = B[i][j];
        }
    vector<int> d;
    {
        DSU dsu;
        dsu.init(n * m);
        for (int x = 0; x < n; ++x)
            for (int y = 0; y < m; ++y)
                for (int d = 0; d < 4; ++d)
                {
                    int tox = x + dx[d];
                    int toy = y + dy[d];
                    if (good(tox, toy))
                    {
                        int diff = abs(r[x][y] - r[tox][toy]) + abs(g[x][y] - g[tox][toy]) + abs(b[x][y] - b[tox][toy]);
                        if (diff <= 40)
                            dsu.merge(x * m + y, tox * m + toy);
                    }
                }

        for (int i = 0; i < n * m; ++i)
            if (dsu.p[i] == i)
                d.pb(i);
    }
    sort(all(d));
    reverse(all(d));
    if ((int)d.size() == 1)
        return 4;
    if (d[0] + d[1] >= (double)(n * m) * 0.70)
        return 4;
    d.clear();
    {
        DSU dsu;
        dsu.init(n * m);
        for (int x = 0; x < n; ++x)
            for (int y = 0; y < m; ++y)
                for (int d = 0; d < 4; ++d)
                {
                    int tox = x + dx[d];
                    int toy = y + dy[d];
                    if (good(tox, toy))
                    {
                        int diff = abs(r[x][y] - r[tox][toy]) + abs(g[x][y] - g[tox][toy]) + abs(b[x][y] - b[tox][toy]);
                        if (diff <= 5)
                            dsu.merge(x * m + y, tox * m + toy);
                    }
                }

        for (int i = 0; i < n * m; ++i)
            if (dsu.p[i] == i)
                d.pb(i);
    }
    if (((double)d.size() / (double)(H * W)) <= 0.1)
        return 1;
    if (((double)d.size() / (double)(H * W)) >= 0.7)
        return 3;
    return 2;
}

// #include <stdio.h>
// #include "artclass.h"
// #include <assert.h>

// static int DIM[2];
// static int R[500][500];
// static int G[500][500];
// static int B[500][500];

// int main()
// {
//     assert(scanf("%d", &DIM[1]) == 1);
//     assert(scanf("%d", &DIM[0]) == 1);
//     for (int i = 0; i < DIM[0]; i++)
//         for (int j = 0; j < DIM[1]; j++)
//             assert(scanf("%d %d %d", &R[i][j], &G[i][j], &B[i][j]) == 3);
//     printf("%d\n", style(DIM[0], DIM[1], R, G, B));
//     return 0;
// }

• Subtask 1: 0 / 100