Submission #762215

#	Time	Username	Problem	Language	Result	Execution time	Memory
762215		SanguineChameleon	Art Class (IOI13_artclass)	C++17	62 / 100	50 ms	3316 KiB

artclass

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

const int BLOCK = 2;
int A[BLOCK][BLOCK][BLOCK];

vector<int> E = {316802,72937,1085,14691,252802,999,215365,1188819,1142783,496,31638,3639,136985,264,201847,239348,549462,6492,6782,5210,99769,5712,133911,526162,412535,105592,0,1076,541230,507,296980,115080,};

int style(int N, int M, int R[500][500], int G[500][500], int B[500][500]) {
	for (int r = 0; r < BLOCK; r++) {
		for (int g = 0; g < BLOCK; g++) {
			for (int b = 0; b < BLOCK; b++) {
				A[r][g][b] = 1;
			}
		}
	}
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < M; j++) {
			A[R[i][j] / (256 / BLOCK)][G[i][j] / (256 / BLOCK)][B[i][j] / (256 / BLOCK)]++;
		}
	}
	pair<long double, int> res = make_pair(1e18L, -1);
	for (int X = 0; X < 4; X++) {
		long double score = 0.0L;
		int totA = 0;
		int totE = 0;
		for (int r = 0; r < BLOCK; r++) {
			for (int g = 0; g < BLOCK; g++) {
				for (int b = 0; b < BLOCK; b++) {
					totA += A[r][g][b];
					totE += E[X * BLOCK * BLOCK * BLOCK + r * BLOCK * BLOCK + g * BLOCK + b] + 1;
				}
			}
		}
		for (int r = 0; r < BLOCK; r++) {
			for (int g = 0; g < BLOCK; g++) {
				for (int b = 0; b < BLOCK; b++) {
					long double exp = 1.0L * (E[X * BLOCK * BLOCK * BLOCK + r * BLOCK * BLOCK + g * BLOCK + b] + 1) / totE * totA;
					score += (exp - A[r][g][b]) * (exp - A[r][g][b]) / exp;
				}
			}
		}
		res = min(res, make_pair(score, X + 1));
	}
	return res.second;
}

• Subtask 1: 62 / 100