#pragma GCC optimize("Ofast") #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; using ll = long long; using P = pair; template using V = vector; template using VV = V>; template bool chmin(T& t, const U& u) { if (t > u) { t = u; return 1; } else return 0; } template bool chmax(T& t, const U& u) { if (t < u) { t = u; return 1; } else return 0; } #define REP(i,n) for(int i=0;i=int(b);i--) #define MP make_pair #define SZ(x) int(x.size()) #define ALL(x) x.begin(),x.end() #define INF 10001000 #define endl "\n" chrono::system_clock::time_point t_start; const double TIME_LIMIT1 = 100, TIME_LIMIT = 950; double last_update = 0, t_diff; double start_temp, end_temp; mt19937 rng; using uni_int = uniform_int_distribution<>; using uni_real = uniform_real_distribution<>; using u64 = uint64_t; using u32 = uint32_t; class XorInt { public: uint32_t x = 2463534242; XorInt() {}; XorInt(uint32_t seed) { x = 2463534242 + seed; }; uint32_t next() { x ^= x << 13; x ^= x >> 17; x ^= x << 5; return x; } uint32_t operator()(uint32_t l, uint32_t r) { return (this->next() % (r - l)) + l; } uint32_t operator()(uint32_t d) { return this->next() % d; } }; XorInt xs; class Xor64 { public: uint64_t x = 88172645463325252ULL; Xor64() {}; Xor64(uint64_t seed) { x = 88172645463325252ULL + seed; } uint64_t next() { x ^= x << 13; x ^= x >> 7; x ^= x << 17; return x; } uint64_t operator()(uint64_t l, uint64_t r) { return (this->next() % (r - l)) + l; } uint64_t operator()(uint64_t d) { return this->next() % d; } }; Xor64 xx; void get_time() { auto t_now = chrono::system_clock::now(); t_diff = chrono::duration_cast(t_now - t_start).count(); } int N, M; const int A = 5; int score = 0; int bestScore = 0; int cnt = 0,update_cnt=0,cnt2=0; int tempFuel = 0; VV candidates; VV distances; VV destinations; V route; class Pos { public: int x = 0; int y = 0; int kind = 0; int order = 0; Pos() {}; Pos(int sx, int sy) :x(sx), y(sy) {}; Pos(int sx, int sy, int o) :x(sx), y(sy), order(o) {}; }; class Planet :public Pos { public: Planet() { kind = 1; }; Planet(int sx, int sy, int o) :Pos(sx, sy, o) { kind = 1; }; }; class Station :public Pos { public: Station() { kind = 2; }; Station(int sx, int sy, int o) :Pos(sx, sy, o) { kind = 2; }; }; int Diff(int lx, int ly, int rx, int ry) { return (lx - rx) * (lx - rx) + (ly - ry) * (ly - ry); } int getFuel(Pos& l, Pos& r) { int dis = (l.x - r.x) * (l.x - r.x) + (l.y - r.y) * (l.y - r.y); if (l.kind != r.kind) return dis * A; if (l.kind == 1) return dis * A * A; return dis; } V planets; V stations; Pos& setPos(int k) { if (k < N)return planets[k]; return stations[k % N]; } int getScore(V& route) { int sumFuel = 0; FOR(i, 1, route.size() - 1) { Pos& current = setPos(route[i - 1]); Pos& target = setPos(route[i]); sumFuel += getFuel(current, target); } return int(round(1000000000.0 / (1000.0 + sqrt(sumFuel)))); } void calcCenter(V& labels, V

& centers) { V counter(M); REP(i, M)centers[i] = MP(0, 0); REP(i, N) { Planet& planet = planets[i]; counter[labels[i]]++; centers[labels[i]].first += planet.x; centers[labels[i]].second += planet.y; } REP(i, M) { if (counter[i] == 0) { continue; } centers[i].first /= counter[i]; centers[i].second /= counter[i]; } } int reallocate(V& labels, V

& centers) { int res = 0; REP(i, N) { Planet& planet = planets[i]; int newLabel = labels[i]; int minDiff = INF; REP(label, M) { if (chmin(minDiff, Diff(planet.x, planet.y, centers[label].first, centers[label].second))) newLabel = label; } if (newLabel != labels[i])res++; labels[i] = newLabel; } return res; } void kmeans(V& xpos, V& ypos) { V labels(N); REP(i, N)labels[i] = i%M; V

centers(M); calcCenter(labels, centers); REP(i, 300) { int diff=reallocate(labels, centers); if (diff == 0)break; calcCenter(labels, centers); } REP(i, M) { if (centers[i].first == 0)continue; xpos[i] = centers[i].first; ypos[i] = centers[i].second; } } void initwfroid() { REP(i, N)REP(j, N) { destinations[i][j] = j; if (i == j) { distances[i][j] = 0; continue; } distances[i][j] = getFuel(setPos(i), setPos(j)); } REP(k, N) { REP(i, N) { REP(j, N) { if (chmin(distances[i][j], distances[i][k] + distances[k][j])) destinations[i][j] = destinations[i][k]; } } } } int calc() { int res = 0; REP(i, N) { res += distances[route[i]][route[(i + 1) % N]]; } return res; } void wfroid(int range) { REP(i, range)REP(j, range) { destinations[i][j] = j; if (i == j) { distances[i][j] = 0; continue; } distances[i][j] = getFuel(setPos(i), setPos(j)); } REP(k, range) { REP(i, range) { REP(j, range) { if (chmin(distances[i][j], distances[i][k] + distances[k][j])) destinations[i][j] = destinations[i][k]; } } } } void setup() { candidates = VV(N); planets = V(N); stations = V(M); distances = VV(N + M, V(N + M,INF)); destinations = VV(N + M, V(N + M)); route = V(N); REP(i, N) { int x, y; cin >> x >> y; planets[i] = Planet(x, y, i + 1); } start_temp = 10000; end_temp = 10; V xpos = { 250,500,750,250,750,250,500,750 }; V ypos = { 250,250,250,500,500,750,750,750 }; //kmeans(xpos, ypos); REP(i, M) { int x = xpos[i]; int y = ypos[i]; stations[i] = Station(x, y, i + 1); } REP(i, N) { Planet& base = planets[i]; FOR(j, 0, N-1) { if (i == j)continue; Planet& target = planets[j]; if (abs(base.x - target.x)* abs(base.x - target.x) + abs(base.y - target.y)* abs(base.y - target.y) <=800*800) { candidates[i].push_back(j); } } } initwfroid(); REP(i, N) { route[i] = i; } tempFuel = calc(); } void findPosition(int& bestx, int& besty) { int minDiff = INF; REP(i, 100) { REP(j, 100) { int d = 0; int x = 10 * i; int y = 10 * j; Station station(x, y, 0); REP(r, N) { int temp = route[r]; int next = route[(r + 1) % N]; int dis = getFuel(planets[temp], station) + getFuel(station, planets[next]); if (distances[temp][next] > dis) { d += dis - distances[temp][next]; } } if (chmin(minDiff, d)) { bestx = x; besty = y; } } } } void install() { REP(i, M) { int bestx = 500; int besty = 500; findPosition(bestx, besty); stations[i] = Station(bestx, besty, i + 1); wfroid(N + i + 1); } tempFuel = calc(); } void twoOpt(double start,double end) { int a = xs(N - 1); int b = a + 1; int c = xs(N - 3); if (c >= a) { c += 2; } int d = c + 1; if (a > c) { swap(a, c); swap(b, d); } int diff = distances[route[a]][route[c]] + distances[route[b]][route[d]] - distances[route[a]][route[b]] - distances[route[c]][route[d]]; ////焼きなまし double temp = start_temp + (end_temp - start_temp) * (t_diff-start) / (end-start); double prob = exp(-diff / temp);//最大化 if (prob > (xs(INF)) / (double)INF) { //if (diff<0) {//山登り if (c - b < N - d + a) { int l = b, r = c; REP(i,(c-b+1)/2) { swap(route[l], route[r]); l++; r--; } } else { int l = d, r = a; REP(i,(N-d+a+1)/2){ swap(route[l], route[r]); l=(l+1)%N; r=(r+N-1)%N; } } tempFuel += diff; update_cnt++; } } void shift() { int target = xs(M); Station station = stations[target]; int dx = xs(40) - 20; int dy = xs(40) - 20; stations[target] = Station(min(max(station.x + dx, 0), 1000), min(max(station.y + dy, 0), 1000), target + 1); wfroid(N + M); int newFuel = calc(); if (tempFuel > newFuel) { tempFuel = newFuel; } else { stations[target] = station; } } void justification(double limit) { while (t_diff < limit) { shift(); cnt2++; get_time(); } } void makeAnswer(V& new_route) { int start = 0; REP(i, N) { if (route[i] == 0) { start = i; break; } } new_route.push_back(0); FOR(i,1,N){ int temp = route[(start+i - 1)%N]; int next = route[(start+i) % N]; int mid = destinations[temp][next]; while (true) { new_route.push_back(mid); if (mid == next)break; mid = destinations[mid][next]; } } } void out(V& route) { REP(i, M) { cout << stations[i].x << " " << stations[i].y << endl; } cout << route.size() << endl; for (auto p : route) { Pos& pos = setPos(p); cout << pos.kind << " " << pos.order << endl; } } signed main() { cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(15); cerr << fixed << setprecision(15); t_start = chrono::system_clock::now(); get_time(); cin >> N >> M; setup(); //route = chokudaiSearch(1); while (t_diff < 100) { twoOpt(0,100); cnt++; if (cnt % 1000 == 0)get_time(); } install(); while (t_diff < 300) { twoOpt(100, 300); cnt++; if (cnt % 1000 == 0)get_time(); } justification(500); while (t_diff < 650) { twoOpt(500, 650); cnt++; if (cnt % 1000 == 0)get_time(); } justification(800); while (t_diff < TIME_LIMIT) { twoOpt(800, TIME_LIMIT); cnt++; if (cnt % 1000 == 0)get_time(); } Vnew_route; makeAnswer(new_route); score = getScore(new_route); out(new_route); get_time(); cerr << "time=" << int(t_diff) << " ms" << endl; cerr << "score=" << score << endl; //cerr << "last=" << last_update << endl; cerr << "cnt=" << cnt << endl; cerr << "update=" << update_cnt << endl; cerr << "cnt2=" << cnt2 << endl; return 0; }