Submission #250973

#	Time	Username	Problem	Language	Result	Execution time	Memory
250973		A02	Art Class (IOI13_artclass)	C++14	0 / 100	110 ms	8300 KiB

artclass

#include "artclass.h"
#include <iostream>
#include <vector>
#include <math.h>
#include <stdlib.h>

using namespace std;

int style(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {

    vector<long long> differences;

    for (int i = 2; i < H - 2; i++){
        for (int j = 2; j < W - 2; j++){
            long long difference = 0;
            for (int dx = -2; dx <= 2; dx++){
            for (int dy = -2; dy <= 2; dy++){
                difference += abs(R[i + dx][j + dy] - R[i][j]);
                difference += abs(B[i + dx][j + dy] - B[i][j]);
                difference += abs(G[i + dx][j + dy] - G[i][j]);
            }
            }
            differences.push_back(difference);
        }

    }

    long long total = 0;

    for (int i = 0; i < differences.size(); i++){
        total += differences[i] * differences[i];
    }

    double avgd = sqrt(((double) total) / ((double)((H-2) * (W-2))));

    cout << avgd;

    if (avgd < 700){
        return 4;
    }
    if (avgd > 2000){
        return 3;
    }

    long long intensity = 0;
    for (int i = 0; i < H; i++){
        for (int j = 0; j < W; j++){
            intensity += (R[i][j] + G[i][j] + B[i][j]) * ((R[i][j] + G[i][j] + B[i][j]));
        }
    }

    double ag = sqrt(intensity / (H * W));
    if (intensity > 400){
        return 1;
    }
    return 2;

}

Compilation message (stderr)

artclass.cpp: In function 'int style(int, int, int (*)[500], int (*)[500], int (*)[500])':
artclass.cpp:30:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < differences.size(); i++){
                     ~~^~~~~~~~~~~~~~~~~~~~
artclass.cpp:52:12: warning: unused variable 'ag' [-Wunused-variable]
     double ag = sqrt(intensity / (H * W));
            ^~

• Subtask 1: 0 / 100