Submission #369337

#	Time	Username	Problem	Language	Result	Execution time	Memory
369337		kostia244	Art Class (IOI13_artclass)	C++17	87 / 100	114 ms	17772 KiB

artclass

#include "artclass.h"
#include<bits/stdc++.h>
using namespace std;
using ld = long double;
const int maxn = 500;
using vec = array<ld, 3>;
const vec green = {0, 255, 0};
const vec white = {255, 255, 255};
ld dif(vec a, vec b) {
	ld t = 0;
	for(int i = 0; i < 3; i++)
		t += (a[i]-b[i])*(a[i]-b[i]);
	return sqrt(t);
}
int n, m;
vec img[maxn][maxn];
ld compare(vec col) {
	ld sum = 0;
	for(int i = 0; i < n; i++)
		for(int j = 0; j < m; j++)
			sum += dif(img[i][j], col);
	return sum / (n*m);
}
ld sharpness() {
	ld sum = 0;
	for(int i = 0; i+1 < n; i++)
		for(int j = 0; j < m; j++)
			sum += dif(img[i][j], img[i+1][j]);
	for(int i = 0; i < n; i++)
		for(int j = 0; j+1 < m; j++)
			sum += dif(img[i][j], img[i][j+1]);
	sum /= n*(m-1) + (n-1)*m;
	return sum;
}
int style(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
    n = H, m = W;
    for(int i = 0; i < n; i++)
		for(int j = 0; j < m; j++) {
			img[i][j] = {R[i][j],G[i][j],B[i][j]};
		}
	ld f = sharpness();
	ld g = compare(white);
	ld h = compare(green);
	#define B aaa
	const int A = 10;
	const int B = 5;
	const int C = 2;
	vec r = {A*f, B*g, C*h};
	pair<ld, int> ans = {1<<30, 0};
	vector<vec> a;
	a.push_back({A*11.171448888888888, B*163.45119999999997, C*294.5782222222222});//{10, 160, 290});
	a.push_back({A*19.13388888888889, B*292.3247777777778, C*217.07022222222224});//{17, 280, 210});
	a.push_back({A*50.98616666666666, B*228.85688888888888, C*242.315});//{45, 280, 210});
	a.push_back({A*3.838406666666667, B*288.8715555555556, C*258.89955555555554});
	for(int i = 0; i < 4; i++)
		ans = min(ans, {dif(a[i], r), i+1});
    return ans.second;
}

Compilation message (stderr)

artclass.cpp: In function 'int style(int, int, int (*)[500], int (*)[500], int (*)[500])':
artclass.cpp:39:23: warning: narrowing conversion of '(*(R + ((sizetype)(((long unsigned int)i) * 2000))))[j]' from 'int' to 'long double' [-Wnarrowing]
   39 |    img[i][j] = {R[i][j],G[i][j],B[i][j]};
      |                 ~~~~~~^
artclass.cpp:39:31: warning: narrowing conversion of '(*(G + ((sizetype)(((long unsigned int)i) * 2000))))[j]' from 'int' to 'long double' [-Wnarrowing]
   39 |    img[i][j] = {R[i][j],G[i][j],B[i][j]};
      |                         ~~~~~~^
artclass.cpp:39:39: warning: narrowing conversion of '(*(B + ((sizetype)(((long unsigned int)i) * 2000))))[j]' from 'int' to 'long double' [-Wnarrowing]
   39 |    img[i][j] = {R[i][j],G[i][j],B[i][j]};
      |                                 ~~~~~~^

• Subtask 1: 87 / 100