add box-eater optimzier

optimizer/box-breaker.cpp

@@ -163,8 +163,8 @@ inline int solve(Maze q) {
 };	// namespace Solve
 
 const float initial_temperature = 10;
-const float initial_temperature_pv = 70;
-const float termperature_delta = .98;
+const float initial_temperature_pv = 60;
+const float termperature_delta = .97;
 const int population_limit = 30;
 
 struct Gene {
@@ -186,11 +186,14 @@ inline void expandAll(Maze q, std::vector<Gene> &res, float t = initial_temperat
 		for (int j : {0, 1}) {
 			for (int d : {-1, 1}) {
 				compiler_assume(q.poi[i][j] >= 0 && q.poi[i][j] < N);
-				int z = q.poi[i][j] + d;
-				if (0 <= z && z < N) {
 				q.poi[i][j] += d;
+				if (0 <= q.poi[i][j] && q.poi[i][j] < N) {
+					bool flag = false;
+					for (int k = 0; k < POI_EXCEED; ++k)
+						flag |= (q.poi[i][0] == q.poi[k][0] && q.poi[i][1] == q.poi[k][1]);
+
+					if (!flag)
 						expand(q, res, t);
-					q.poi[i][j] -= d;
 				}
 			}
 		}

optimizer/box-eater.cpp

@@ -0,0 +1,359 @@
+#include <bits/stdc++.h>
+#include "pushbox.h"
+#include "box-solver.h"
+
+std::mt19937 rng(std::random_device{}());
+
+#define compiler_assume(condition)		\
+	do {								\
+		if (!(condition))				\
+			__builtin_unreachable();	\
+	} while (false);					\
+
+const float temperature_initial = 60;
+const float temperature_low = 10;
+const float temperature_delta = .97;
+const int species_limit = 5;
+const int population_limit = 10;
+const int SPECIES_NAME_LEN = 4;
+
+struct Gene {
+	Maze m;
+	int w;
+	Gene() {}
+	Gene(const Maze &m, int w) : m(m), w(w) {}
+};
+
+struct Species {
+	std::vector<Gene> population;
+	int best_w;
+	float T, eT;
+	char name[SPECIES_NAME_LEN + 1];
+	int age, tactic;
+
+	Species() : population(), best_w(-1), T(1.), eT(-1), name{"NULL"}, age(0) {}
+
+	int size() const {
+		return population.size();
+	}
+
+	bool empty() const {
+		return population.empty();
+	}
+
+	bool operator<(const Species &o) const {
+		return eT < o.eT;
+	}
+};
+
+inline void writeGene(const Gene &g, std::FILE *f) {
+	std::fprintf(f, "%d\n", g.w);
+	writeMaze(g.m, f);
+}
+
+inline Gene loadGene(std::FILE *f) {
+	Gene g;
+	std::fscanf(f, "%d", &g.w);
+	g.m = loadMaze(f);
+	return g;
+}
+
+inline void writeSpecies(const Species &s, std::FILE *f) {
+	std::fprintf(f, "%d %d %.12f %s %d %d\n", s.size(), s.best_w, s.T, s.name, s.age, s.tactic);
+	for (const auto &g : s.population) {
+		writeGene(g, f);
+	}
+}
+
+inline Species loadSpecies(std::FILE *f) {
+	Species res;
+	int n;
+	std::fscanf(f, "%d %d %f %s %d %d", &n, &res.best_w, &res.T, res.name, &res.age, &res.tactic);
+	res.population.reserve(n);
+	for (int i = 0; i < n; ++i) {
+		res.population.push_back(loadGene(f));
+	}
+	return res;
+}
+
+inline void loadBiosphere(std::vector<Species> &species, int &best_w, std::FILE *f) {
+	int n;
+	std::fscanf(f, "%d %d", &n, &best_w);
+	species.reserve(n);
+	for (int i = 0; i < n; ++i)
+		species.push_back(loadSpecies(f));
+}
+
+inline void writeBiosphere(const std::vector<Species> &species, int &best_w, std::FILE *f) {
+	int n = species.size();
+	std::fprintf(f, "%d %d\n", n, best_w);
+	for (int i = 0; i < n; ++i)
+		writeSpecies(species[i], f);
+}
+
+inline void randomName(int n, char res[]) {
+	static std::uniform_int_distribution<int> ld(0, 35);
+	for (int i = 0; i < n; ++i) {
+		int c = ld(rng);
+		res[i] = (c < 26 ? c + 'a' : c - 26 + '0');
+	}
+}
+
+static std::uniform_int_distribution<int> rng0N(0, N - 1);
+
+inline void mutationRandomHole(Species &res, const Gene &sc, int clear_cnt) {
+	Gene ac = sc;
+	for (int i = 0; i < clear_cnt; ++i) {
+		int x = rng0N(rng), y = rng0N(rng);
+		ac.m.set(x, y, SQR_SPACE);
+	}
+
+	ac.w = Solve::solve(ac.m);
+	res.best_w = ac.w;
+	res.population.push_back(std::move(ac));
+}
+
+inline void mutationReselectPOI(Species &res, const Gene &sc) {
+	Gene ac = sc;
+	for (int i = 0; i < POI_EXCEED; ++i) {
+		int x = rng0N(rng), y = rng0N(rng);
+		while (true) {
+			bool flag = false;
+			for (int j = 0; j < POI_EXCEED; ++j)
+				flag |= (x == ac.m.poi[j][0] && y == ac.m.poi[j][1]);
+
+			if (!flag)
+				break;
+			x = rng0N(rng);
+			y = rng0N(rng);
+		}
+
+		ac.m.poi[i][0] = x;
+		ac.m.poi[i][1] = y;
+		for (int dx = -1; dx <= 1; ++dx) {
+			for (int dy = -1; dy <= 1; ++dy) {
+				int xx = x + dx, yy = y + dy;
+				if (0 <= xx && xx < N && 0 <= yy && yy < N)
+					ac.m.set(xx, yy, SQR_SPACE);
+			}
+		}
+	}
+	
+	ac.w = Solve::solve(ac.m);
+	if (ac.w != -1) {
+		res.best_w = ac.w;
+		res.population.push_back(std::move(ac));
+	}
+}
+
+inline void mutationLineCl(Species &res, const Gene &sc) {
+	Gene ac = sc;
+	int r = rng0N(rng);
+	for (int i = 0; i < N; ++i) {
+		ac.m.set(r, i, SQR_SPACE);
+	}
+
+	ac.w = Solve::solve(ac.m);
+	res.best_w = ac.w;
+	res.population.push_back(std::move(ac));
+}
+
+inline void mutationColCl(Species &res, const Gene &sc) {
+	Gene ac = sc;
+	int c = rng0N(rng);
+	for (int i = 0; i < N; ++i) {
+		ac.m.set(i, c, SQR_SPACE);
+	}
+
+	ac.w = Solve::solve(ac.m);
+	res.best_w = ac.w;
+	res.population.push_back(std::move(ac));
+}
+
+inline void mutationSqrCl(Species &res, const Gene &sc, int sz) {
+	Gene ac = sc;
+	int cx = rng0N(rng), cy = rng0N(rng);
+	int sz2 = sz / 2;
+	for (int dx = -sz2; dx <= sz2; ++dx) {
+		for (int dy = -sz2; dy <= sz2; ++dy) {
+			int xx = cx + dx, yy = cy + dy;
+			if (0 <= xx && xx < N && 0 <= yy && yy < N)
+				ac.m.set(xx, yy, SQR_SPACE);
+		}
+	}
+
+	ac.w = Solve::solve(ac.m);
+	res.best_w = ac.w;
+	res.population.push_back(std::move(ac));
+}
+
+inline Species mutation(const Species &sc) {
+	static std::uniform_int_distribution<int> rngTacs(0, 6);
+	Species res;
+	randomName(SPECIES_NAME_LEN, res.name);
+	res.T = temperature_initial;
+
+	do {
+		int tactic = rngTacs(rng);
+		res.tactic = tactic;
+		switch (tactic) {
+		case 0:
+			mutationRandomHole(res, sc.population[0], 60);
+			break;
+		case 1:
+			mutationRandomHole(res, sc.population[0], 40);
+			break;
+		case 2:
+			mutationReselectPOI(res, sc.population[0]);
+			break;
+		case 3:
+			mutationLineCl(res, sc.population[0]);
+			break;
+		case 4:
+			mutationColCl(res, sc.population[0]);
+			break;
+		case 5:
+			mutationSqrCl(res, sc.population[0], 3);
+			mutationSqrCl(res, sc.population[0], 3);
+			break;
+		case 6:
+			mutationSqrCl(res, sc.population[0], 5);
+			break;
+		}
+	} while (res.size() == 0);
+	return res;
+}
+
+inline void expand(const Maze &q, std::vector<Gene> &res) {
+	int s = Solve::solve(q);
+	if (s != -1)
+		res.emplace_back(q, s);
+}
+
+inline void inheritGene(Maze q, std::vector<Gene> &res) {
+	for (int i = 0; i < POI_EXCEED; ++i) {
+		for (int j : {0, 1}) {
+			for (int d : {-1, 1}) {
+				compiler_assume(q.poi[i][j] >= 0 && q.poi[i][j] < N);
+
+				q.poi[i][j] += d;
+				if (0 <= q.poi[i][j] && q.poi[i][j] < N) {
+					bool flag = false;
+					for (int k = 0; k < POI_EXCEED; ++k)
+						flag |= (q.poi[i][0] == q.poi[k][0] && q.poi[i][1] == q.poi[k][1]);
+
+					if (!flag)
+						expand(q, res);
+				}
+				q.poi[i][j] -= d;
+			}
+		}
+	}
+
+	for (int i = 0; i < 25; i++) {
+		compiler_assume(q.isValid());
+		int x = rng0N(rng), y = rng0N(rng);
+		q.flip(x, y);
+		if (q.isValid())
+			expand(q, res);
+		q.flip(x, y);
+	}
+}
+
+inline void inherit(Species &s) {
+	std::vector<Gene> nxt;
+	for (auto &g : s.population) {
+		inheritGene(g.m, nxt);
+		nxt.push_back(std::move(g));
+	}
+	s.population.clear();
+
+	for (const auto &g : nxt) {
+		s.best_w = std::max(s.best_w, g.w);
+	}
+
+	for (auto &g : nxt) {
+		if (g.w == s.best_w)
+			s.population.push_back(std::move(g));
+	}
+	nxt.clear();
+
+	std::shuffle(s.population.begin(), s.population.end(), rng);
+	if (s.population.size() > population_limit)
+		s.population.resize(population_limit);
+}
+
+int main() {
+	std::vector<Species> biosphere;
+	int history_best_w;
+
+	auto frecord = std::fopen("current.txt", "r");
+	loadBiosphere(biosphere, history_best_w, frecord);
+	std::fclose(frecord);
+
+	std::uniform_real_distribution<float> d01(0, 1);
+	for (int iter_id = 1; ; ++iter_id) {
+		int best_w = 0, hbest_w = 0;
+		for (auto &s : biosphere) {
+			inherit(s);
+			best_w = std::max(best_w, s.best_w);
+			if (s.T > temperature_low)
+				hbest_w = std::max(hbest_w, s.best_w);
+		}
+
+		std::vector<Species> Hnxt, Lnxt;
+		for (auto &s : biosphere) {
+			const bool is_ht = s.T > temperature_low;
+			const float dE = (is_ht ? hbest_w : best_w) - s.best_w;
+			s.eT = exp(-dE / s.T);
+			if (s.eT >= d01(rng) || s.age <= 15) {
+				if (is_ht)
+					Hnxt.push_back(std::move(s));
+				else
+					Lnxt.push_back(std::move(s));
+			}
+		}
+		biosphere.clear();
+		if (Lnxt.size()) {
+			biosphere.push_back(std::move(*std::max_element(Lnxt.begin(), Lnxt.end())));
+		}
+
+		while (Hnxt.size() + biosphere.size() < species_limit) {
+			if (biosphere.size()) {
+				Hnxt.push_back(mutation(biosphere[0]));
+			} else {
+				int sc = std::uniform_int_distribution<int>{0, (int)Hnxt.size() - 1}(rng);
+				Hnxt.push_back(mutation(Hnxt[sc]));
+			}
+		}
+
+		for (auto &s : Hnxt) {
+			s.age += 1;
+			s.T = std::max(s.T * temperature_delta, temperature_low);
+			biosphere.push_back(std::move(s));
+		}
+		Hnxt.clear();
+
+		bool broke_record = best_w > history_best_w;
+		if (broke_record) {
+			history_best_w = best_w;
+			printf("New Record: %d!\n", best_w);
+			std::FILE *f = fopen("best.txt", "w");
+			writeBiosphere(biosphere, best_w, f);
+			fclose(f);
+		}
+
+		if (true) {
+			printf("Iterated for %d times.\n", iter_id);
+			printf("Current Best=%d, History Best=%d, Species:\n", best_w, history_best_w);
+			for (auto &s : biosphere) {
+				printf(" - %s[%d]: best=%d T=%.3f age=%d.\n", s.name, s.tactic, s.best_w, s.T, s.age);
+			}
+
+			std::FILE *f = fopen("current.txt", "w");
+			writeBiosphere(biosphere, best_w, f);
+			fclose(f);
+		}
+	}
+	return 0;
+}

optimizer/box-solver.h

@@ -0,0 +1,72 @@
+#pragma once
+#include <bitset>
+#include <queue>
+#include <tuple>
+#include <cstring>
+#include "pushbox.h"
+
+namespace Solve {
+std::bitset<N> mp[N];
+int dis[N][N][N][N];
+std::queue<std::tuple<int, int, int, int>> qu;
+
+inline int bfs(int px, int py, int bx, int by, int tx, int ty) {
+	std::memset(dis, 127, sizeof(dis));
+	while (!qu.empty())
+		qu.pop();
+
+	auto expand = [&](int npx, int npy, int nbx, int nby, int d) {
+		if (npx < 0 || npx >= N)
+			return;
+		if (npy < 0 || npy >= N)
+			return;
+		if (nbx < 0 || nbx >= N)
+			return;
+		if (nby < 0 || nby >= N)
+			return;
+		if (mp[npx][npy] == 0)
+			return;
+		if (mp[nbx][nby] == 0)
+			return;
+		if (npx == nbx && npy == nby)
+			return;
+
+		if (dis[npx][npy][nbx][nby] <= d)
+			return;
+		dis[npx][npy][nbx][nby] = d;
+		qu.emplace(npx, npy, nbx, nby);
+	};
+
+	expand(px, py, bx, by, 0);
+
+	while (!qu.empty()) {
+		auto [npx, npy, nbx, nby] = qu.front();
+		int d = dis[npx][npy][nbx][nby];
+		qu.pop();
+
+		if (nbx == tx && nby == ty)
+			return d;
+
+		expand(npx + 1, npy, nbx, nby, d + 1);
+		expand(npx - 1, npy, nbx, nby, d + 1);
+		expand(npx, npy + 1, nbx, nby, d + 1);
+		expand(npx, npy - 1, nbx, nby, d + 1);
+		if (npx + 1 == nbx && npy == nby)
+			expand(npx + 1, npy, nbx + 1, nby, d + 1);
+		if (npx - 1 == nbx && npy == nby)
+			expand(npx - 1, npy, nbx - 1, nby, d + 1);
+		if (npx == nbx && npy + 1 == nby)
+			expand(npx, npy + 1, nbx, nby + 1, d + 1);
+		if (npx == nbx && npy - 1 == nby)
+			expand(npx, npy - 1, nbx, nby - 1, d + 1);
+	}
+	return -1;
+}
+
+inline int solve(Maze q) {
+	for (int i = 0; i < 20; ++i)
+		mp[i] = q.M[i];
+	return bfs(q.poi[POI_PERSON][0], q.poi[POI_PERSON][1]
+		, q.poi[POI_BOX][0], q.poi[POI_BOX][1], q.poi[POI_TARGET][0], q.poi[POI_TARGET][1]);
+}
+};	// namespace Solve

optimizer/pushbox.h

@@ -0,0 +1,92 @@
+#pragma once
+#include <bitset>
+
+const int N = 20;
+
+enum {
+	POI_PERSON,
+	POI_BOX,
+	POI_TARGET,
+	POI_EXCEED,
+};
+
+enum {
+	SQR_WALL = 0,
+	SQR_SPACE = 1,
+	SQR_EXCEED = 2,
+};
+
+struct Maze {
+	std::bitset<N> M[N];
+	int poi[3][2];
+
+	int at(int x, int y) const {
+		return M[x][y];
+	}
+
+	void set(int x, int y, int v) {
+		M[x][y] = v;
+	}
+
+	void flip(int x, int y) {
+		M[x].flip(y);
+	}
+
+	bool isValid() const {
+		for (int i = 0; i < POI_EXCEED; ++i) {
+			for (int j : {0, 1}) {
+				if (poi[i][j] < 0 || poi[i][j] >= N)
+					return false;
+			}
+
+			if (at(poi[i][0], poi[i][1]) == 0)
+				return false;
+		}
+		return true;
+	}
+};
+
+inline Maze loadMaze(std::FILE *f) {
+	char *s = new char[N + 5];
+	Maze res;
+	for (int i = 0; i < N; ++i) {
+		std::fscanf(f, "%s", s);
+		for (int j = 0; j < N; ++j) {
+			res.set(i, j, s[j] != '#');
+			switch (s[j]) {
+			case 'P':
+				res.poi[POI_PERSON][0] = i;
+				res.poi[POI_PERSON][1] = j;
+				break;
+			case '*':
+				res.poi[POI_BOX][0] = i;
+				res.poi[POI_BOX][1] = j;
+				break;
+			case 'O':
+				res.poi[POI_TARGET][0] = i;
+				res.poi[POI_TARGET][1] = j;
+				break;
+			}
+		}
+	}
+	delete[] s;
+	return res;
+}
+
+inline void writeMaze(const Maze &m, std::FILE *f) {
+	for (int i = 0; i < N; ++i) {
+		for (int j = 0; j < N; ++j) {
+			if (i == m.poi[POI_PERSON][0] && j == m.poi[POI_PERSON][1])
+				std::fputc('P', f);
+			else if (i == m.poi[POI_BOX][0] && j == m.poi[POI_BOX][1])
+				std::fputc('*', f);
+			else if (i == m.poi[POI_TARGET][0] && j == m.poi[POI_TARGET][1])
+				std::fputc('O', f);
+			else if (m.at(i, j) == 0)
+				std::fputc('#', f);
+			else
+				std::fputc('.', f);
+		}
+		std::fputc('\n', f);
+	}
+}