Submission #730943

#	Time	Username	Problem	Language	Result	Execution time	Memory
730943		grogu	Passport (JOI23_passport)	C++14	40 / 100	2073 ms	129172 KiB

passport

#define here cerr<<"===========================================\n"
#define dbg(x) cerr<<#x<<": "<<x<<endl;
#include <bits/stdc++.h>
#define ld double
#define ll long long
#define ull unsigned long long
#define llinf 100000000000000000LL // 10^17
#define iinf 2000000000 // 2*10^9
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define all(a) a.begin(),a.end()
using namespace std;

#define maxn 500005
int n,q;
pair<int,int> a[maxn];
vector<pair<int,ll> > g[maxn];
ll dis[maxn];
ll dis1[maxn];
int ls[maxn],rs[maxn],tsz = 0,root = 0;
int id[maxn];
void upd(int x,int y,ll w){
    g[x].pb({y,w});
}
void init(int &v,int tl,int tr){
    if(!v) v = ++tsz;
    if(tl==tr){
        id[tl] = v;
        return;
    }
    int mid = (tl+tr)/2;
    init(ls[v],tl,mid);
    init(rs[v],mid+1,tr);
    upd(v,ls[v],0);
    upd(v,rs[v],0);
}
void upd(int v,int tl,int tr,int l,int r,int u){
    if(l>r||l>tr||tl>r||tl>tr) return;
    if(tl>=l&&tr<=r){
        upd(u,v,0);
        return;
    }
    ll mid = (tl+tr)/2;
    upd(ls[v],tl,mid,l,r,u);
    upd(rs[v],mid+1,tr,l,r,u);
}
void getdis(int poc){
    for(int i = 1;i<=tsz;i++) dis[i] = llinf;
    dis[poc] = 0;
    deque<ll> pq;
    pq.pb(poc);
    while(pq.size()){
        ll u = pq.front();
        pq.pop_front();
        for(pll p : g[u]){
            ll s = p.fi;
            ll w = p.sc;
            if(dis[u]+w<dis[s]){
                dis[s] = dis[u]+w;
                if(w) pq.pb(s);
                else pq.push_front(s);
            }
        }
    }
}
int main(){
    ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
    cin >> n;
    init(root,1,n);
    for(ll i = 1;i<=n;i++){
        cin >> a[i].fi >> a[i].sc;
        tsz++;
        upd(id[i],tsz,1);
        upd(1,1,n,a[i].fi,a[i].sc,tsz);
    }
    cin >> q;
    while(q--){
        ll x; cin >> x;
        getdis(id[x]);
        for(ll i = 1;i<=tsz;i++) dis1[i] = dis[i];
        ll ans = llinf;
        for(ll i = 1;i<=tsz;i++){
            getdis(i);
            ans = min(ans,dis1[i] + dis[id[1]] + dis[id[n]]);
        }
        if(ans==llinf) ans = -1;
        cout<<ans<<endl;
    }
    return 0;
}
/**
4
1 3
2 4
2 3
4 4
1
1
**/

• Subtask 1: 0 / 6
• Subtask 2: 16 / 16
• Subtask 3: 24 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46