Submission #499697

#	Time	Username	Problem	Language	Result	Execution time	Memory
499697		ergagan	Evacuation plan (IZhO18_plan)	C++17	22 / 100	4080 ms	146136 KiB

plan

//я так много думал, что опять попал
#include <bits/stdc++.h>
#define all(x) x.begin(),x.end()
#define pb push_back
#define ppb pop_back
#define pf push_front
#define ppf pop_front
#define f first
#define s second
#define left(v) v + v
#define right(v) v + v + 1
#define ub upper_bound
#define lb lower_bound
#define pll pair<ll, ll>
#define gay natural

//17 SEVENTEEN
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
//#pragma GCC tahget("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;
typedef long long ll;

const long double Pi = acos(-1.0);
const ll dx[] = {0,0,1,-1};
const ll dy[] = {1,-1,0,0};
const ll N = (ll) 1e6 + 17;
const ll M = (ll) 5e3 + 69;
const ll inf = (ll) 1e9 + 3;
const ll mod = (ll) 1e9 + 7;
ll sq(ll x) { return x * x; }

ll zxc = 1, mal, a[N], b[N];
ll n, m, k, q, u[N], v[N], w[N];
ll x, p[N], d[N], lw[N], hg[N], ko[N];

set<pll> st;
vector<ll> dsu[N];
vector<pll> dis, g[N];

void mrg(ll u, ll v) {
	if(u == v) return;
	if(dsu[u].size() > dsu[v].size()) swap(u, v);

	for(auto x : dsu[u])
		dsu[v].pb(x), p[x] = v;

	dsu[u].clear();
}

void solve() {

    cin >> n >> m;

    for(ll i = 1; i <= n; i++) {
        d[i] = inf;
    }

    for(ll i = 1; i <= m; i++) {
        cin >> u[i] >> v[i] >> w[i];
        g[u[i]].pb({v[i], w[i]}), g[v[i]].pb({u[i], w[i]});
    }

    cin >> k;
    for(ll i = 1; i <= k; i++) {
        cin >> mal;
        d[mal] = 0;
        st.insert({d[mal], mal});
    }


    while(!st.empty()) {
		ll v = st.begin() -> second;
		st.erase(st.begin());
		for(auto [to, len] : g[v]) {
			if (d[v] + len < d[to])
				st.erase({d[to], to}), d[to] = d[v] + len, st.insert({d[to], to});
		}
    }

    for(ll i = 1; i <= m; i++) {
        dis.pb({min(d[u[i]], d[v[i]]), i});
    }
    sort(all(dis));
    reverse(all(dis));

    cin >> q;

    for(ll i = 1; i <= q; i++) {
        cin >> a[i] >> b[i];
        lw[i] = 0, hg[i] = inf;
    }

    ll ok = 1;
    while(ok) {
        ok = 0;
        vector<pair<pll, ll> > vq;
        for(auto x : dis) vq.pb({{x.f, 1}, x.s});

        for(ll i = 1; i <= n; i++) p[i] = i, dsu[i].pb(i);

        for(ll i = 1; i <= q; i++) {
            if(lw[i] != hg[i])
                vq.pb({{(lw[i] + hg[i] + 1) / 2, 0}, i}), ok = 1;
        }

        sort(all(vq));
        reverse(all(vq));

        for(auto x : vq) {
            ll m = x.f.f, id = x.s, tp = x.f.s;
            if(!tp) {
                if(p[a[id]] == p[b[id]]) lw[id] = m;
                else hg[id] = m - 1;
            }
            else mrg(p[u[id]], p[v[id]]);
        }

        for(ll i = 1; i <= n; i++) dsu[i].clear();
    }

    for(ll i = 1; i <= q; i++) {
        cout << lw[i] << "\n";
    }
}

/*

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
5
1 6
5 3
4 8
5 8
1 5

*/

int main(/*Уверенно*/) {
ios_base::sync_with_stdio(0);
    cin.tie(0);
/*
	freopen(".in", "r", stdin);
	freopen(".out", "w", stdout);
*/
//    cin >> zxc;
    while(zxc--) {
        solve();
    }
  	return 0;
}
// さよならさ いかなくちゃ
/*
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡀⠀⠀⠀⢀⣀⣠⣤⣼⣿⣿⣿⣿⣿⣿⣿⣅⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣯⣽⣢⢤⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⣿⣿⣿⠿⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣯⡍⠲⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠉⠉⢩⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠋⢢⣈⠫⢄⠀⠀⠀⠀⠀⠀⢀⡄⠂⢄⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀⣰⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⣽⣿⣿⣿⣿⣽⣿⣿⣿⣿⣷⡧⠀⠀⠀⠀⢀⠎⠀⠀⠀⢃⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣿⣿⣿⣿⣿⣿⣿⡟⠀⠀⠀⠀⣸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⣿⣟⣣⠀⠀⠀⡎⠀⠀⠀⠀⠀⡆⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⣿⣿⣿⣿⣿⣿⠏⠀⠀⠀⠀⢠⣿⣿⣿⣿⣿⣿⣿⣿⡋⣿⣿⣿⣿⣿⣿⣿⣿⣿⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡔⡄⠀⠁⠀⠀⠀⠀⠀⢰⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⠿⠋⠁⠀⠀⠀⠀⠀⣼⣿⣿⣿⣿⣿⣿⣿⣿⡇⣯⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⡇⢰⠇⠀⠀⠀⠀⠀⡘⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠉⠀⠀⠀⠀⠀⠀⠀⠀⣼⣼⣿⣿⠿⣿⣿⣿⡿⢹⣿⣿⣿⣿⣿⣿⡽⣯⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠎⠦⡀⠀⠀⠀⢀⠇⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⢢⣿⡇⣼⣧⣶⣿⣿⣿⠁⢸⢿⣿⣿⣿⣿⣿⣷⡘⣷⡹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠧⡙⠀⠑⢄⣀⠤⠂⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⣟⣼⣿⣿⣿⣿⣿⣿⠀⠀⢛⣿⣿⣿⣿⣿⡿⣿⡬⠿⣾⡻⣿⣿⣿⣿⣿⣿⣿⣿⣿⢯⣿⣿⣿⣿⣿⣻⡆⢰⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠂⠀⣿⢻⣿⣿⣿⣿⣿⣿⣿⡏⠉⠉⠻⢿⣿⣿⣿⣿⣜⢿⣮⡙⠷⣦⣉⠓⢿⣷⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠆⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠤⠤⠤⠤⣀⠀⠘⠀⠀⣿⢸⢿⣿⣿⣿⣿⣿⠘⢿⠈⠁⠐⠄⠙⢟⢿⣿⣿⣦⡵⣟⣶⣽⣿⣿⣿⣿⣿⣿⣿⣿⣯⣾⣿⣿⣿⣿⣼⣿⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢀⠎⠀⠀⠀⠀⠀⠀⠑⠆⠀⠀⣿⠀⣿⣿⣿⣿⣿⣿⣀⣬⣧⣖⣢⠄⠀⠀⠀⠈⠑⠈⠹⠿⠋⠘⣿⣿⣿⡆⣿⣿⣿⡏⡧⣿⣿⣿⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠊⠀⠀⠀⠀⠀⠀⠀⠀⠈⢆⠀⢿⠀⢹⣿⣿⣿⣿⣿⣿⡿⠻⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⢮⠴⢃⣿⣿⣿⣿⣷⡟⣿⣿⣿⣿⣿⣟⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠄⠸⡆⡄⢿⣿⣿⣿⣿⣿⡻⢄⠙⢿⣻⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣾⢻⣿⣿⣿⢈⣷⣿⣿⣿⣿⣿⣿⣿⡆⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⡆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢱⠐⠹⣵⠀⣿⣿⣿⣿⣿⢿⠦⠀⠀⠀⠀⠀⠀⠂⠀⠀⠀⠀⠀⠀⠀⡠⠞⠁⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡷⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⡁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠘⢦⣿⣿⣿⣿⣿⣮⣆⠀⠀⠀⠀⠀⠈⠂⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣇⢣⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣦⣤⡤⠀⠀⠀⠀⢀⣀⣀⣀⡀⠀⠀⢀⠴⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡌⡆⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⢰⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡅⠀⠀⠀⣾⠇⣿⣿⣿⣿⣿⣿⣿⣿⣶⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣠⣶⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⠘⡀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡜⠀⠀⠀⣸⡟⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣢⢄⠀⠀⢀⣤⣶⣿⢟⣿⣿⣿⣿⠰⢸⠾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡆⢡⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠰⡀⠀⠀⠀⠀⠀⠀⢀⠜⠀⠀⠀⣰⡟⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠇⠉⣫⢻⡿⠛⢁⢾⣿⣿⣿⡇⠇⡜⠀⡿⣻⣿⣿⣿⣿⣿⣿⣿⣿⣻⡈⡆⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠑⢄⠀⠀⠀⡠⠔⠁⠀⠀⠀⣰⡟⠀⠀⣟⣿⣿⣿⣿⣿⣿⠿⠛⠋⠉⠉⠛⠻⢗⠏⠏⢸⢇⢠⠟⣾⣿⣿⣿⣱⠊⠀⠀⡿⡞⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⢸⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠈⠁⠀⠀⠀⠀⢀⡾⠋⠀⠀⣸⠇⣿⣹⣿⣿⣿⣇⠀⠀⠀⠀⠀⠀⠀⡈⠀⠀⠸⢻⠋⢸⣿⣿⣿⢿⠃⠀⠀⠀⣇⠗⢿⡇⢹⣿⣿⢿⣿⣿⣿⣿⣏⡆⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡰⠛⠁⠀⠀⢠⡟⢀⣿⣿⣿⣿⣿⡟⣄⠀⠀⠀⠀⢠⣴⣧⣤⣄⣠⠣⣀⣿⣿⣿⣟⠎⠀⠀⠀⠀⣽⠀⠘⣿⠊⠫⡺⣷⣌⠉⡿⢿⣿⡇⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠊⠀⠀⠀⢀⡠⣾⣁⣼⣿⣿⣿⢹⣿⡇⠈⠑⠂⠀⠀⠈⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣽⣿⣿⠇⡜⠘⡄⠀⠹⣧⠀⠈⠪⢙⢻⠷⠦⠿⣿⡄⠀⠀
⠀⠀⢀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠊⠀⣀⠔⣒⣵⣾⣿⣿⣿⣿⣿⣿⡇⢸⣿⠀⠀⡇⠀⠀⠀⠀⣿⣿⣿⣿⠿⣿⣿⣿⣿⣿⣿⣿⣿⢋⡼⠔⠀⠉⢄⡀⠙⣧⠀⣀⡴⠉⠉⠉⠉⠹⣷⡀⠀
⠀⠈⢏⣷⣮⣕⠢⠀⠀⠀⠀⢠⠞⢀⠔⢉⣴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⣸⠃⠀⠠⠃⠀⠀⠀⢐⡨⠋⠀⣗⡄⢸⣿⣿⡿⡿⣿⡿⢣⠊⠀⠀⠀⠀⠀⠈⠑⠚⠻⣿⣄⣀⡀⠀⢀⣠⣿⣗⡀
⠀⠀⠀⢻⣿⣿⣿⣄⢂⠀⢠⣟⠔⠁⣰⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⢀⠏⣀⠞⠀⠀⠀⠀⠀⠈⠀⠀⠀⣿⠀⢸⣿⣟⠀⢣⠀⡰⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠛⠛⠛⠛⠊⢸⣿⡝
⠀⠀⠀⠀⢻⣿⣿⣿⣆⢃⢸⡏⢀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣾⣿⡁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣧⢸⣿⡟⠀⠸⠊⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⣿⣷
⠀⠀⠀⠀⠀⢻⣿⣿⣿⡞⡔⣣⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣄⠀⠀⠀⠀⠀⠀⠀⠀⣠⠀⠘⠻⡼⣇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡞⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⢻⣿
⠀⠀⠀⠀⠀⠀⢻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣆⠀⠀⠀⠀⠀⠀⢀⠇⠀⠀⠀⠑⠌⠢⠀⣀⣀⠀⠀⠀⠀⠀⠀⣽⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢰⣿⢸⣿
⠀⠀⠀⠀⠀⠀⠈⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣠⣰⣿⣿⣯⣆⠀⠀⠀⠀⠀⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⣿⢸⣿
⠀⠀⠀⠀⠀⠀⠀⠈⣏⠻⢿⣿⣿⣿⣿⣿⣿⡇⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⡄⠀⠀⠆⠀⢀⣠⢰⣿⣿⣿⣿⣿⣿⣿⣿⡆⠀⠀⠀⠜⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⡟⢸⡟
⠀⠀⠀⠀⠀⠀⠀⠀⢸⢇⠈⢿⣿⣿⣿⣿⣿⠁⢀⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄⡈⣠⣶⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣆⠀⢠⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣾⡟⢁⡟⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠘⠀⠆⠈⢿⣿⣿⣿⡇⠀⢸⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄⡎⠀⠀⠀⠀⠀⣀⣀⣀⣀⣀⣰⣏⣀⣊⣀⣀
*/

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