Submission #995021

#	Time	Username	Problem	Language	Result	Execution time	Memory
995021		edogawa_something	Passport (JOI23_passport)	C++17	40 / 100	1052 ms	1048576 KiB

passport

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vii;
typedef pair<ll,ll> pii;
#define F first 
#define S second 
#define all(v) v.begin(),v.end()
#define pb push_back
#define pow poww
const int M=1e6+10;
const ll mod=998244353;
const ll inf=2e18;
ll pow(ll x,ll y){
  ll res=1;
  x%=mod;
  while(y>0){
    if(y%2==1){
      res*=x,res%=mod;  
    }
    x*=x,x%=mod;
    y/=2;
  }
  return res;
}
ll n,dis[M],diss[M],ans[M];
bool vis[M];
vii adj[M];
void bfs(ll x){
  queue<ll>q;
  for(int i=1;i<=n;i++)
  vis[i]=0,dis[i]=inf;
  vis[x]=1;
  dis[x]=0;
  q.push(x);
  while(!q.empty()){
    ll y=q.front();
    q.pop();
    for(auto it:adj[y]){
      if(!vis[it])
      q.push(it),vis[it]=1,dis[it]=dis[y]+1;
    }
  }
}
int main(){
  ios_base::sync_with_stdio(0),cin.tie(0);
  ll TC=1;
  //cin>>TC;
  while(TC--){
    cin>>n;
    for(int i=1;i<=n;i++){
      ll x,y;
      cin>>x>>y;
      for(int j=x;j<=y;j++){
        if(j==i)
        continue;
        adj[j].pb(i);
      }
    }
    bfs(1);
    for(int i=1;i<=n;i++)
    swap(dis[i],diss[i]);
    bfs(n);
    for(int i=1;i<=n;i++)
    dis[i]+=diss[i];
    priority_queue<pii,vector<pii>,greater<pii>>q;
    for(int i=1;i<=n;i++)
    ans[i]=inf;
    for(int i=1;i<=n;i++){
    if(i!=1&&i!=n)
    q.push({dis[i]-1,i});
    else
    q.push({dis[i],i});
    }
    for(int i=1;i<=n;i++)
    vis[i]=0;
    while(!q.empty()){
      pii p=q.top();
      q.pop();
      if(vis[p.S])
      continue;
      vis[p.S]=1;
      ans[p.S]=p.F;
      for(auto it:adj[p.S]){
        q.push({p.F+1,it});
      }
    }
    ll querycnt;
    cin>>querycnt;
    while(querycnt--){
      ll x;
      cin>>x;
      if(ans[x]==inf)
      ans[x]=-1;
      cout<<ans[x]<<'\n';
    }
  }
  return 0;
}
/*

*/

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