結果

問題 No.5002 stick xor
ユーザー pirozhkipirozhki
提出日時 2018-05-29 12:22:09
言語 C++11
(gcc 13.3.0)
結果
TLE  
実行時間 -
コード長 4,593 bytes
コンパイル時間 33,633 ms
実行使用メモリ 1,760 KB
スコア 0
最終ジャッジ日時 2018-05-29 12:22:45
ジャッジサーバーID
（参考情報） 		judge7 /
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 TLE -
testcase_01 WA -
testcase_02 TLE -
testcase_03 TLE -
testcase_04 WA -
testcase_05 WA -
testcase_06 WA -
testcase_07 WA -
testcase_08 WA -
testcase_09 WA -
testcase_10 WA -
testcase_11 WA -
testcase_12 WA -
testcase_13 WA -
testcase_14 WA -
testcase_15 WA -
testcase_16 WA -
testcase_17 WA -
testcase_18 WA -
testcase_19 WA -
testcase_20 WA -
testcase_21 WA -
testcase_22 WA -
testcase_23 WA -
testcase_24 WA -
testcase_25 WA -
testcase_26 WA -
testcase_27 WA -
testcase_28 WA -
testcase_29 WA -
testcase_30 WA -
testcase_31 WA -
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ソースコード

diff # 

#include <iostream>
#include <vector>
#include <random>
#include <algorithm>
#include <type_traits>

using namespace std;

enum Dir {
	UP,
	DOWN,
	RIGHT,
	LEFT
};

struct Param {
	int x;
	int y;
	int k;
	Dir d;
};

void PrintParam(const Param& param) {
	int x1 = param.x;
	int y1 = param.y;
	int x2 = param.x;
	int y2 = param.y;

	switch (param.d) {
	case Dir::UP:
		y1 -= param.k - 1;
		break;
	case Dir::DOWN:
		y2 += param.k - 1;
		break;
	case Dir::RIGHT:
		x2 += param.k - 1;
		break;
	case Dir::LEFT:
		x1 -= param.k - 1;
		break;
	}
	cout << y1 << " " << x1 << " " << y2 << " " << x2 << endl;
}

void PrintArray(const vector<bool>& arr, int n) {
	for (unsigned int i = 0; i < arr.size(); i++) {
		cout << arr[i] << " ";
		if ((i + 1) % n == 0) {
			cout << endl;
		}
	}
	cout << endl;
}

void Flip(vector<bool>& arr, int n, const Param& param) {
	for (int i = 0; i < param.k; i++) {
		switch (param.d) {
		case Dir::UP:
			arr[(param.y - i) * n + param.x].flip();
			break;
		case Dir::DOWN:
			arr[(param.y + i) * n + param.x].flip();
			break;
		case Dir::RIGHT:
			arr[param.y * n + (param.x + i)].flip();
			break;
		case Dir::LEFT:
			arr[param.y * n + (param.x - i)].flip();
			break;
		}
	}
}

int Evaluate(vector<bool> arr, int n, const vector<Param>& params, bool print = false) {
	for (const Param& param : params) {
		Flip(arr, n, param);
		if (print) {
			PrintArray(arr, n);
		}
	}
	return count(arr.begin(), arr.end(), true);
}

bool IsValid(const Param& param, int n) {
	switch (param.d) {
	case Dir::UP:
		if (param.y - (param.k - 1) < 0) {
			return false;
		}
		break;
	case Dir::DOWN:
		if (param.y + (param.k - 1) > n - 1) {
			return false;
		}
		break;
	case Dir::RIGHT:
		if (param.x + (param.k - 1) > n - 1) {
			return false;
		}
		break;
	case Dir::LEFT:
		if (param.x - (param.k - 1) < 0) {
			return false;
		}
		break;
	}
	return true;
}

void Read(vector<Param>& params, vector<bool>& arr, int& n) {
	int k;
	cin >> n >> k;
	for (int i = 0; i < k; i++) {
		Param p = { 0 };
		cin >> p.k;
		params.push_back(p);
	}

	string s;
	for (int i = 0; i < n; i++) {
		cin >> s;
		for (char& c : s) {
			if (c == '0') {
				arr.push_back(0);
			}
			else {
				arr.push_back(1);
			}
		}
	}
}

template<class T>
class Random
{
public:
	Random(T min, T max) : mt_(rd_()), dist_(min, max) {}

	T operator()() {
		return dist_(mt_);
	}
private:
	random_device rd_;
	mt19937 mt_;
	typename conditional<is_floating_point<T>::value, uniform_real_distribution<>, uniform_int_distribution<>>::type dist_;
};

double Probability(double e1, double e2, double t) {
	if (e1 >= e2) {
		return 1;
	}
	else {
		return exp((e1 - e2) / t);
	}
}

double Temperature(double r) {
	double alpha = 0.5;
	return pow(alpha, r);
}

class Randomize {
public:
	Randomize(int n, int size) : rand_(0, size - 1), rand_pos_(0, n - 1), rand_dir_(0, 3), n_(n) {}

	vector<Param> One(vector<Param>& params) {
		int i = rand_();
		do {
			params[i].d = static_cast<Dir>(rand_dir_());
			params[i].x = rand_pos_();
			params[i].y = rand_pos_();
		} while (!IsValid(params[i], n_));
		return params;
	}

	vector<Param> All(vector<Param>& params) {
		for (Param& param : params) {
			do {
				param.d = static_cast<Dir>(rand_dir_());
				param.x = rand_pos_();
				param.y = rand_pos_();
			} while (!IsValid(param, n_));
		}
		return params;
	}

private:
	int n_;
	Random<int> rand_;
	Random<int> rand_pos_;
	Random<int> rand_dir_;
};

// 黒の数を最小化
vector<Param> Yakinamasi(const vector<Param>& params, const vector<bool>& arr, int n) {
	vector<Param> current_params(params);
	Randomize randomize(n, current_params.size());
	randomize.All(current_params);
	double current_e = Evaluate(arr, n, current_params);
	vector<Param> best_params = current_params;
	double best_e = current_e;

	Random<double> rand(0, 1);
	int goal_e = 0;
	int itr_count = 35000;
	for (int i = 0; i < itr_count; i++) {
		vector<Param> next_params(current_params);
		randomize.One(next_params);
		double next_e = Evaluate(arr, n, next_params);
		if (next_e < best_e) {
			best_params = next_params;
			best_e = next_e;
			//cout << best_e << endl;
			if (best_e <= goal_e) {
				return best_params;
			}
		}
		if (rand() <= Probability(current_e, next_e, Temperature(static_cast<double>(i) / itr_count))) {
			current_params = next_params;
			current_e = next_e;
		}
	}
	return best_params;
}

int main() {
	vector<Param> params;
	vector<bool> arr;
	int n;

	Read(params, arr, n);

	vector<Param> best_params = Yakinamasi(params, arr, n);

	for (const Param& param : best_params) {
		PrintParam(param);
	}

	return 0;
}
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