제출 #591834

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
591834		dnass	미술 수업 (IOI13_artclass)	C++17	100 / 100	128 ms	9292 KiB

artclass

#include "artclass.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long int lld;
typedef long double lf;

int h, w;
int r[500][500], g[500][500], b[500][500];

lf calc_green(){
	lld res = 0;
	for(int i=0;i<h;i++){
		for(int j=0;j<w;j++){
			res += (g[i][j]-r[i][j]);
			res += (g[i][j]-b[i][j]);
			res += 2*(255-r[i][j]);
			res += 2*(255-b[i][j]);
		}
	}
	return ((lf) res)/((lf)(h*w));
}

lf calc_white(){
	lld res = 0;
	for(int i=0;i<h;i++){
		for(int j=0;j<w;j++){
			if(r[i][j]>165&&g[i][j]>165&&b[i][j]>165) res++;
		}
	}
	return ((lf) res)/((lf)(h*w));
}

lf calc_global_noise(){
	lld res = 0;
	for(int i=0;i<h;i++){
		for(int j=0;j<w;j++){
			for(int ii=max(i-5,0);ii<=min(i+5, h-1);ii++){
				for(int jj=max(j-5,0);jj<=min(j+5, w-1);jj++){
					res += (g[ii][jj]-g[i][j])*(g[ii][jj]-g[i][j]);
					res += (r[ii][jj]-r[i][j])*(r[ii][jj]-r[i][j]);
					res += (b[ii][jj]-b[i][j])*(b[ii][jj]-b[i][j]);
				}
			}
		}
	}
	return ((lf) res)/((lf)(h*w));
}

lf calc_local_noise(){
	lld res = 0;
	for(int i=0;i<h;i++){
		for(int j=0;j<w;j++){
			for(int ii=max(i-1,0);ii<=min(i+1, h-1);ii++){
				for(int jj=max(j-1,0);jj<=min(j+1, w-1);jj++){
					res += (g[ii][jj]-g[i][j])*(g[ii][jj]-g[i][j]);
					res += (r[ii][jj]-r[i][j])*(r[ii][jj]-r[i][j]);
					res += (b[ii][jj]-b[i][j])*(b[ii][jj]-b[i][j]);
				}
			}
		}
	}
	return ((lf) res)/((lf)(h*w));
}

lf calc_diff(){
	set<pair<pair<int, int>, int>> used;
	for(int i=0;i<h;i++){
		for(int j=0;j<w;j++){
			used.insert({{r[i][j]/10, g[i][j]/10}, b[i][j]/10});
		}
	}
	lld res = (lld) used.size();
	return ((lf) res);
}

bool visited[500][500];
const int dx[8] = {1,0,-1,0,-1,1,-1,1}, dy[8] = {0,1,0,-1,-1,-1,1,1};
const int CLOSE = 20;

void bfs(int inix, int iniy){
	queue<pair<int, int>> q;
	q.push({inix,iniy});
	visited[inix][iniy];
	int x,y;
	while(!q.empty()){
		auto now = q.front(); q.pop();
		x = now.first; y = now.second;
		int newx, newy;
		for(int i=0;i<8;i++){
			newx = x+dx[i]; newy = y+dy[i];
			if(newx<0||newx>=h||newy<0||newy>=w) continue;
			if(abs(r[x][y]-r[newx][newy])>CLOSE||abs(g[x][y]-g[newx][newy])>CLOSE||abs(b[x][y]-b[newx][newy])>CLOSE) continue;
			if(visited[newx][newy]) continue;
			visited[newx][newy] = true;
			q.push({newx, newy});

		}
	}
	return;
}

lf calc_comps(){
	memset(visited, false, sizeof visited);
	lld res = 0;
	for(int i=0;i<h;i++){
		for(int j=0;j<w;j++){
			if(!visited[i][j]){
				bfs(i, j);
				res++;
			}
		}
	}
	return 10000.00000000*((lf) res)/((lf)(h*w));
}

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];
		}
	}
	lf green = calc_green();
	lf white = calc_white();
	lf global_noise = calc_global_noise();
	lf local_noise = calc_local_noise();
	lf comps = calc_comps();
	//lf diff = calc_diff();
	//cout << comps << endl;
	if(global_noise<200000&&local_noise<2000) return 4;
	if(global_noise>500000&&local_noise>12500&&comps>300) return 3;
	if(green*(1-white)>450) return 2;
	return 1;
}

컴파일 시 표준 에러 (stderr) 메시지

artclass.cpp: In function 'void bfs(int, int)':
artclass.cpp:83:20: warning: statement has no effect [-Wunused-value]
   83 |  visited[inix][iniy];
      |  ~~~~~~~~~~~~~~~~~~^

• Subtask 1: 100 / 100