제출 #1207509

#제출 시각아이디문제언어결과실행 시간메모리
1207509dksnfjkfnwkfwCities (BOI16_cities)C++20
100 / 100
1472 ms67308 KiB
#include <bits/stdc++.h> using namespace std; #define sonic ios_base::sync_with_stdio(false);cin.tie(0); cout.tie(0) #define IO(main) if(fopen(main".inp","r")){freopen(main".inp","r",stdin);freopen(main".out","w",stdout);} #define pb push_back #define fi first #define se second #define mp make_pair #define ins insert #define pb push_back #define el cout << endl #define SZ(x) ((int)(x).size()) #define ALL(x) (x).begin(), (x).end() #define MASK(i) ((1LL)<<(i)) #define BIT(x,i) (((x)>>(i))&(1LL)) #define FOR(i, a, b) for(int (i)=(a);(i)<=(b); i++) #define FORD(i, a, b) for(int (i)=(a);(i)>=(b); i--) using ll = long long; #define int ll using ull = unsigned long long; using ld = long double; using pii = pair<int, int>; using pll = pair<ll, ll>; using vi = vector<int>; using vii = vector<pii>; const int N = 1e6 + 9; const int mod = 1e9 + 7; const ll INF = 1e18 + 7; const int base = 31; const int LOG = 20; const ll MOD = 1e9 + 7; int mul(int x, int y) {return 1LL * x * y % mod;} int calPw(int x, int y) { int ans = 1; while(y) { if (y&1) ans = 1LL * ans * x % mod; x = 1LL * x * x % mod; y >>= 1; } return ans; } int d4x[4] = {1, 0, -1, 0}; int d4y[4] = {0, 1, 0, -1}; int dx[8] = {0, 1, 1, 1, 0, -1, -1, -1}; int dy[8] = {1, 1, 0, -1, -1, -1, 0, 1}; ///Author: Le Chi Thien Luong The Vinh high school 2008 ///code template<class X, class Y> bool minimize(X &x , Y y){ if(x > y){ x = y; return true; } return false; } template<class X, class Y> bool maximize(X &x , Y y){ if(x < y){ x = y; return true; } return false; } template<class X, class Y> bool add(X &x , Y y){ if((x + y ) >= mod){ ll tmp = x + y; x = tmp - mod; return true; } return false; } void Solve(){ } int n, dp[N][MASK(5) + 2], m; int ct[N], k; vector<pii>adj[N]; void calc(){ FOR(i, 1, n)FOR(mask,0, MASK(k) - 1)dp[i][mask] = INF; FOR(i, 0, k - 1)dp[ct[i]][MASK(i)] = 0; FOR(mask, 0, MASK(k) - 1){ for(int submask = mask; submask > 0; submask = (submask - 1) & mask){ FOR(i, 1, n) dp[i][mask] = min(dp[i][mask], dp[i][mask ^ submask] + dp[i][submask]); } priority_queue<pii, vector<pii>, greater<pii>>q; FOR(i, 1, n)if(dp[i][mask] != INF)q.push({dp[i][mask], i}); while(q.size()){ int u = q.top().se; int cost = q.top().fi; q.pop(); if(cost > dp[u][mask])continue; for(pii v : adj[u]){ if(dp[v.fi][mask] > dp[u][mask] + v.se){ dp[v.fi][mask] = dp[u][mask] + v.se; q.push({dp[v.fi][mask], v.fi}); } } } } /// int ans = INF; FOR(i, 1, n)ans = min(ans, dp[i][MASK(k) - 1]); cout << ans; } void Read(){ cin >> n >> k >> m; FOR(i, 0, k - 1)cin >> ct[i]; FOR(i, 1, m){ int u, v, w; cin >> u >> v >> w; adj[u].push_back({v, w}); adj[v].push_back({u, w}); } calc(); } signed main() { sonic; int TEST = 1; // cin >> TEST; while(TEST--) { Read(); Solve(); } }
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