Submission #956601

#	Time	Username	Problem	Language	Result	Execution time	Memory
956601		ZHIRDILBILDIZ	Passport (JOI23_passport)	C++14	100 / 100	1631 ms	187716 KiB

passport

#include<bits/stdc++.h>
#define fi first
#define se second
#define ll long long
#define pll pair<ll, ll>
using namespace std;
const ll N = (1 << 18);
const ll INF = 1e18;
ll n, q;
vector<pll> gr[3 * N + 10];
void build (ll l = 1, ll r = N, ll v = 1) {
    if (l == r) {
        gr[l].push_back({v + N, 0});
        return;
    }
    ll mid = (l + r) >> 1;
    build(l, mid, v << 1);
    build(mid + 1, r, v << 1 ^ 1);
    gr[(v << 1) + N].push_back({v + N, 0});
    gr[((v << 1) ^ 1) + N].push_back({v + N, 0});
}
void add_road (ll l1, ll r1, ll x, ll v = 1, ll l = 1, ll r = N) {
    if (l > r1 || r < l1)
        return;
    if (l1 <= l && r <= r1) {
        gr[v + N].push_back({x, 1});
        return;
    }
    ll mid = (l + r) >> 1;
    add_road (l1, r1, x, v << 1, l, mid);
    add_road (l1, r1, x, v << 1 ^ 1, mid + 1, r);
}

vector<ll> deikstra (vector<pll> v) {
    vector<ll> dist(3 * N, INF);
    for (auto i : v)
        dist[i.fi] = i.se;
    set<pll> st;
    for (auto i = 0; i < 3 * N; ++i)
        st.insert({dist[i], i});
    while (st.size()) {
        auto p = *st.begin();
        st.erase(st.begin());
        for (auto i : gr[p.se])
            if (dist[i.fi] > p.fi + i.se) {
                st.erase({dist[i.fi], i.fi});
                dist[i.fi] = p.fi + i.se;
                st.insert({dist[i.fi], i.fi});
            }
    }
    vector<ll> now(n + 1);
    for (ll i = 1; i <= n; ++i)
        now[i] = dist[i];
    return now;
}

signed main () {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    build();
    cin >> n;
    for (ll i = 1; i <= n; ++i) {
        ll l, r;
        cin >> l >> r;
        add_road (l, r, i);
    }

    vector<ll> dist_from_n = deikstra({{n, 0}});
    vector<ll> dist_from_one = deikstra({{1, 0}});
    vector<pll> v;
    for (ll i = 1; i <= n; ++i)
        v.push_back({i, dist_from_n[i] + dist_from_one[i] - (1 < i && i < n)});
    vector<ll> ans = deikstra(v);

    cin >> q;
    while (q--) {
        ll x;
        cin >> x;
        if (ans[x] >= INF)
            cout << "-1\n";
        else
            cout << ans[x] << '\n';
    }
    return 0;
}

• Subtask 1: 6 / 6
• Subtask 2: 16 / 16
• Subtask 3: 24 / 24
• Subtask 4: 8 / 8
• Subtask 5: 46 / 46