제출 #555410

#제출 시각아이디문제언어결과실행 시간메모리
555410SharpEdgedCommuter Pass (JOI18_commuter_pass)C++17
31 / 100
267 ms20484 KiB
#include <bits/stdc++.h> using namespace std; #define f first #define s second #define pb push_back #define eb emplace_back #define mp make_pair #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define LSB(x) ((x) & -(x)) #define sz(x) (int)(x.size()) #define uid(a, b) uniform_int_distribution<int>(a, b)(rng) #define __lcm(a, b) ((a) * (b)) / __gcd(a, b) template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; } template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; } typedef long long ll; typedef long double ld; typedef unsigned long long ull; mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); void __print(int x) {cerr << x;} void __print(long x) {cerr << x;} void __print(long long x) {cerr << x;} void __print(unsigned x) {cerr << x;} void __print(unsigned long x) {cerr << x;} void __print(unsigned long long x) {cerr << x;} void __print(float x) {cerr << x;} void __print(double x) {cerr << x;} void __print(long double x) {cerr << x;} void __print(char x) {cerr << '\'' << x << '\'';} void __print(const char *x) {cerr << '\"' << x << '\"';} void __print(const string &x) {cerr << '\"' << x << '\"';} void __print(bool x) {cerr << (x ? "true" : "false");} template<typename T, typename V> void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ", "; __print(x.second); cerr << '}';} template<typename T> void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? ", " : ""), __print(i); cerr << "}";} void _print() {cerr << "]\n";} template <typename T, typename... V> void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);} #ifdef DEBUG #define dbg(x...) cerr << "\e[DEBUG] "<<__func__<<": "<<__LINE__<<", [" << #x << "] = ["; _print(x); #else #define dbg(x...) #endif struct Data { int r1, c1, r2, c2, d; Data(int _r1, int _c1, int _r2, int _c2, int _d) : r1(_r1), c1(_c1), r2(_r2), c2(_c2), d(_d) {}; bool operator== (const Data& b) const { return r1 == b.r1 && r2 == b.r2 && c1 == b.c1 && c2 == b.c2 && d == b.d; } }; struct custom_hash { static uint64_t splitmix64(uint64_t x) { // http://xorshift.di.unimi.it/splitmix64.c x += 0x9e3779b97f4a7c15; x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9; x = (x ^ (x >> 27)) * 0x94d049bb133111eb; return x ^ (x >> 31); } size_t operator()(uint64_t x) const { static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); return splitmix64(x + FIXED_RANDOM); } size_t operator()(string x) const { static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); uint64_t res = 0; for (int i = 0; i < sz(x); i++){ res ^= x[i] + FIXED_RANDOM; res = splitmix64(res); } return res; } size_t operator()(Data x) const { static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count(); uint64_t res = ((splitmix64(x.r1) ^ splitmix64(splitmix64(x.c1) + FIXED_RANDOM)) ^ splitmix64(splitmix64(x.r2) ^ (splitmix64(splitmix64(x.c2)) ^ x.d))) + FIXED_RANDOM; return res; } }; const ll MOD = 1e9 + 7; const ll INFLL = 1e18 + 5; const int INF = 1e9 + 5; char nl = '\n'; ll modPow(ll n, ll k){ if (k == 0) return 1; ll res = modPow(n, k / 2); res = res * res % MOD; if (k & 1) return res * n % MOD; return res; } const int mxN = 1e5; bool ccw(pair<ll, ll> p1, pair<ll, ll> p2, pair<ll, ll> p3){ ll val = (p1.f * p2.s - p1.s * p2.f + p2.f * p3.s - p2.s * p3.f + p3.f * p1.s - p3.s * p1.f); if (val <= 0) return 1; return 0; } const int MAXN = 1<<20; const int MAXP = 500; int n, m; vector<vector<pair<int, ll>>> adj; vector<ll> distU, distV, dpU, dpV; ll ans = INFLL; vector<ll> getDist(int s){ vector<ll> dist(n, INFLL); vector<int> vis(n); dist[s] = 0; using T = pair<ll, int>; priority_queue<T, vector<T>, greater<T>> pq; pq.push({0, s}); while (!pq.empty()){ int now = pq.top().s; pq.pop(); if (vis[now]) continue; vis[now] = 1; for (auto nxt : adj[now]){ if (dist[nxt.f] > dist[now] + nxt.s){ dist[nxt.f] = dist[now] + nxt.s; pq.push({dist[nxt.f], nxt.f}); } } } return dist; } void TestCase(){ int s, t, u, v; cin >> n >> m >> s >> t >> u >> v; s--; t--; u--; v--; adj.resize(n); for (int i = 0; i < m; i++){ int a, b, w; cin >> a >> b >> w; a--; b--; adj[a].eb(b, w); adj[b].eb(a, w); } distU = getDist(u); distV = getDist(v); dpU = distU; dpV = distV; vector<ll> dist(n, INFLL); vector<int> vis(n); dist[s] = 0; using T = pair<ll, int>; priority_queue<T, vector<T>, greater<T>> pq; pq.push({0, s}); while (!pq.empty()){ int now = pq.top().s; pq.pop(); if (vis[now]) continue; vis[now] = 1; for (auto nxt : adj[now]){ ll d = dist[now] + nxt.s; if (dist[nxt.f] > d){ dpU[nxt.f] = min(distU[nxt.f], dpU[now]); dpV[nxt.f] = min(distV[nxt.f], dpV[now]); dist[nxt.f] = dist[now] + nxt.s; pq.push({dist[nxt.f], nxt.f}); } else if (dist[nxt.f] == d){ ckmin(dpU[nxt.f], dpU[now]); ckmin(dpV[nxt.f], dpV[now]); } } } cout << min(dpU[t] + dpV[t], distU[v]) << nl; } int main(){ ios_base::sync_with_stdio(0); cin.tie(0); int T = 1; //cin >> T; while (T--){ TestCase(); } return 0; }
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