Submission #1118561

#	Time	Username	Problem	Language	Result	Execution time	Memory
1118561		salmon	Passport (JOI23_passport)	C++14	6 / 100	700 ms	114176 KiB

passport

#include <bits/stdc++.h>
using namespace std;

int N;
int l[200100],r[200100];
queue<pair<int,int>> q;
int d0[200100];
int dn[200100];
int Q;

struct node{

    int s,e,m;
    vector<int> v;
    node *l,*r;

    node(int S, int E){
        s = S;
        e = E;
        m = (s + e)/2;
        v = {};

        if(s != e){
            l = new node(s,m);
            r = new node(m + 1, e);
        }
    }

    void update(int S, int E, int k){
        if(S <= s && e <= E){
            v.push_back(k);
            return;
        }

        if(S <= m){
            l -> update(S,E,k);
        }
        if(m < E){
            r -> update(S,E,k);
        }
    }

    void pop(int i, int k){
        while(!v.empty()){
            q.push({v.back(),k});
            v.pop_back();
        }

        if(s == e) return;

        if(i <= m) l -> pop(i,k);
        else r -> pop(i,k);
    }
}*root;

int main(){

    scanf(" %d",&N);

    root = new node(0,N-1);

    for(int i = 0; i < N; i++){
        scanf(" %d",&l[i]);
        scanf(" %d",&r[i]);

        l[i]--;
        r[i]--;
    }

    for(int i = 0; i < N; i++){
        root -> update(l[i],r[i],i);
        d0[i] = -1;
    }

    root -> pop(0,1);

    while(!q.empty()){
        pair<int,int> ii = q.front();
        q.pop();

        int i = ii.first;

        if(d0[i] != -1) continue;

        d0[i] = ii.second;
        root -> pop(i,ii.second + 1);
    }

    root = new node(0,N-1);

    for(int i = 0; i < N; i++){
        root -> update(l[i],r[i],i);
        dn[i] = -1;
    }

    root -> pop(N - 1, 1);

    while(!q.empty()){
        pair<int,int> ii = q.front();
        q.pop();

        int i = ii.first;

        if(dn[i] != -1) continue;

        dn[i] = ii.second;
        root -> pop(i,ii.second + 1);
    }

    scanf(" %d",&Q);

    if(Q == 1){
        printf("%d",dn[0]);
    }
}

Compilation message (stderr)

passport.cpp: In function 'int main()':
passport.cpp:58:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |     scanf(" %d",&N);
      |     ~~~~~^~~~~~~~~~
passport.cpp:63:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         scanf(" %d",&l[i]);
      |         ~~~~~^~~~~~~~~~~~~
passport.cpp:64:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         scanf(" %d",&r[i]);
      |         ~~~~~^~~~~~~~~~~~~
passport.cpp:110:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  110 |     scanf(" %d",&Q);
      |     ~~~~~^~~~~~~~~~

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