Submission #584774

#	Time	Username	Problem	Language	Result	Execution time	Memory
584774		benson1029	Art Class (IOI13_artclass)	C++14	91 / 100	79 ms	21836 KiB

artclass

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

int h,w;
bool vis[500][500];
int v[500][500][3];
double avg[500][500][3];
int dx[4] = {0, 0, 1, -1};
int dy[4] = {1, -1, 0, 0};

bool valid(int x, int y) {
    return (x>=0&&y>=0&&x<h&&y<w);
}

bool near(int X1, int Y1, int X2, int Y2) {
    return (abs(v[X1][Y1][0]-v[X2][Y2][0]) + abs(v[X1][Y1][1]-v[X2][Y2][1]) + abs(v[X1][Y1][2]-v[X2][Y2][2])) <= 30;
}

bool near2(int X1, int Y1, int X2, int Y2) {
    return (abs(v[X1][Y1][0]-v[X2][Y2][0]) + abs(v[X1][Y1][1]-v[X2][Y2][1]) + abs(v[X1][Y1][2]-v[X2][Y2][2])) <= 10;
}

void dfs(int x, int y) {
    vis[x][y] = true;
    for(int i=0; i<4; i++) {
        if(!valid(x+dx[i], y+dy[i])) continue;
        if(vis[x+dx[i]][y+dy[i]]) continue;
        if(near(x, y, x+dx[i], y+dy[i])) {
            dfs(x+dx[i], y+dy[i]);
        }
    }
}

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++) {
        v[i][j][0] = R[i][j];
        v[i][j][1] = G[i][j];
        v[i][j][2] = B[i][j];
    }
    int connected_component = 0;
    for(int i=0; i<h; i++) for(int j=0; j<w; j++) {
        if(!vis[i][j]) {
            dfs(i, j);
            connected_component++;
        }
    }
    if(connected_component <= 500) return 4;
    double r,g,b;
    int cntg = 0;
    for(int i=0; i<h; i++) for(int j=0; j<w; j++) {
        r += R[i][j];
        g += G[i][j];
        b += B[i][j];
        if(G[i][j]-50 > B[i][j] && G[i][j]+10 > R[i][j]) cntg++;
    }
    if(g > r && g > b) cntg += 100000;
    int cntsame = 0;
    for(int i=0; i<h; i++) {
        for(int j=0; j<w; j++) {
            if(i>=3 && near2(i, j, i-3, j)) cntsame++;
            if(j>=3 && near2(i, j, i, j-3)) cntsame++;
        }
    }
    if(cntg > 10000) return 2;
    if(cntsame>100000) return 1;
    return 3;
}

Compilation message (stderr)

artclass.cpp: In function 'int style(int, int, int (*)[500], int (*)[500], int (*)[500])':
artclass.cpp:59:5: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |     if(g > r && g > b) cntg += 100000;
      |     ^~
artclass.cpp:59:5: warning: 'g' may be used uninitialized in this function [-Wmaybe-uninitialized]
artclass.cpp:59:14: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |     if(g > r && g > b) cntg += 100000;
      |        ~~~~~~^~~~~~~~

• Subtask 1: 91 / 100