Submission #667834

#	Time	Username	Problem	Language	Result	Execution time	Memory
667834		Kaztaev_Alisher	Evacuation plan (IZhO18_plan)	C++17	0 / 100	262 ms	17920 KiB

plan

//#pragma GCC optomize ("Ofast")
//#pragma GCC optomize ("unroll-loops")
//#pragma GCC target ("avx,avx2,fma")
 
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define sz size
#define cl clear
#define ins insert
#define ers erase
#define pii pair < int , int >
#define pll pair< long long  , long long >
#define all(x) x.begin() , x.end()
#define ios ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define tostr(x) to_string(x)
#define tonum(s) atoi(s.c_str())
#define seon(x) setprecision(x)
#define bpop(x) __builtin_popcount(x)
#define deb(x) cerr << #x  << " = " << x << endl;
#define int ll
 
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
const double PI = 3.14159265;
 
const ll N = 1e5+5;
const ll mod = 1e9+7;
const ll inf = 1e9;
const ll INF = 1e18;
 
using namespace std;
 
ll n , m , q;
ll dp[N];
vector<pll> g[N];
pll road[N];
 
void bfs(){
	set<pll> st;
	int k;
	cin >> k;
	for(int i = 1; i <= n; i++) dp[i] = inf;
	for(int i = 1; i <= k; i++) {
		int u;
		cin >> u;
		dp[u] = 0;
		st.ins({0 , u});
	}
	while(st.sz()){
		int v = st.begin()->S;
		st.ers(st.begin());
		for(pll to : g[v]){
			if(dp[to.F] > dp[v]+to.S){
				st.ers({dp[to.F] , to.F});
				dp[to.F] = dp[v]+to.S;
				st.ins({dp[to.F] , to.F});
			}
		}
	}
}
void solve(){
	cin >> n >> m;
	for(int i = 1; i <= m; i++){
		int a, b , c;
		cin >> a>> b >> c;
		g[a].pb({b , c});
		g[b].pb({a , c});
	}
	bfs();
	for(int i = 1; i <= n; i++) road[i] = {INF , 0};
	cin >> q;
	while(q--){
		int u , v;
		cin >> u >> v;
		road[u] = {0 , dp[u]};
		set<pair<pll , ll> > st;
		st.ins({road[u] , u});
		while(st.sz() > 0){
			int v = st.begin()->S;
			st.ers(st.begin());
			for(pll x : g[v]){
				ll to = x.F , c = x.S;
				if(road[to].F > road[v].F + c){
					st.ers({road[to] , to});
					road[to].F = road[v].F + c;
					road[to].S = min(road[v].S , dp[to]);
					st.ins({road[to] , to});
				} else if(road[to].F == road[v].F + c && road[to].S < min(road[v].S , dp[to])){
					st.ers({road[to] , to});
					road[to].F = road[v].F + c;
					road[to].S = min(road[v].S , dp[to]);
					st.ins({road[to] , to});
				}
			}
		}
		cout << road[v].S <<"\n";
	}
}
signed main(){
	ios;
	solve();
	return 0;
}
/*
9 12
1 9 4
1 2 5
2 3 7
2 4 3
4 3 6
3 6 4
8 7 10
6 7 5
5 8 1
9 5 7
5 4 12
6 8 2
2
4 7
1
5 8
*/	

• Subtask 1: 0 / 10
• Subtask 2: 0 / 13
• Subtask 3: 0 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 46