Submission #8137

#	Time	Username	Problem	Language	Result	Execution time	Memory
8137		IohcEjnim	Art Class (IOI13_artclass)	C++98	100 / 100	178 ms	33536 KiB

artclass

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

const int same = 31;

int H, W;
int R[510][510], G[510][510], B[510][510];
bool check[510][510];
int abs(int a) {return a > 0 ? a : -a;}

bool sim(int x, int y, int xx, int yy)
{
    if (abs(R[x][y]-R[xx][yy]) > same) return false;
    if (abs(G[x][y]-G[xx][yy]) > same) return false;
    if (abs(B[x][y]-B[xx][yy]) > same) return false;
    return true;
}

void flood(int x, int y)
{
    if (x < 0 || x >= H || y < 0 || y >= W) return;
    if (check[x][y]) return;
    check[x][y] = true;
    if (sim(x, y, x, y+1)) flood(x, y+1);
    if (sim(x, y, x, y-1)) flood(x, y-1);
    if (sim(x, y, x+1, y)) flood(x+1, y);
    if (sim(x, y, x-1, y)) flood(x-1, y);
}

int style(int h, int w, int r[500][500], int g[500][500], int b[500][500])
{
    H = h; W = w;
    for (int i = 0; i < H; i++)
        for (int j = 0; j < W; j++)
        {
            R[i][j] = r[i][j];
            G[i][j] = g[i][j];
            B[i][j] = b[i][j];
        }
    long long sr = 0, sg = 0, sb = 0;
    for (int i = 0; i < H; i++)
        for (int j = 0; j < W; j++)
        {
            sr += R[i][j];
            sg += G[i][j];
            sb += B[i][j];
        }
    sr /= H*W;
    sg /= H*W;
    sb /= H*W;
    //printf("<%3lld %3lld %3lld> ", sr, sg, sb);

    int cnt = 0;
    for (int i = 0; i < H; i++) for (int j = 0; j < W; j++) check[i][j] = false;
    for (int i = 0; i < H; i++)
        for (int j = 0; j < W; j++)
            if (not check[i][j])
            {
                flood(i, j);
                cnt++;
            }
    //printf("<%6d> ", cnt);

    long long cr = 0, cg = 0, cb = 0;
    for (int i = 0; i < H-1; i++)
        for (int j = 0; j < W-1; j++)
        {
            cr += abs(R[i][j]-R[i][j+1]);
            cg += abs(G[i][j]-G[i][j+1]);
            cb += abs(B[i][j]-B[i][j+1]);
            cr += abs(R[i][j]-R[i+1][j]);
            cg += abs(G[i][j]-G[i+1][j]);
            cb += abs(B[i][j]-B[i+1][j]);
        }
    cr *= 10;
    cg *= 10;
    cb *= 10;
    cr /= H*W;
    cg /= H*W;
    cb /= H*W;
    //printf("<%4lld %4lld %4lld> ", cr, cg, cb);

    if (cnt < 15) return 4;
    if (cr+cg+cb > 1200) return 3;
    if (sb < 80) return 2;
    return 1;
}

• Subtask 1: 100 / 100