Submission #1157115

#	Time	Username	Problem	Language	Result	Execution time	Memory
1157115		mychecksedad	Gift Exchange (JOI24_ho_t4)	C++20	9 / 100	2598 ms	1260 KiB

Main

/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
#define ff first
#define ss second
#define pii pair<int,int>
#define vi vector<int>
const int N = 1e6+100, M = 1e5+10, K = 52, MX = 30;


int n, q, pos[N];
array<int, 2> a[N], bad[N];
void solve(){
  cin>> n;
  for(int i = 1; i <= n; ++i){
    cin >> a[i][0];
  }
  for(int i = 1; i <= n; ++i){
    cin >> a[i][1];
  }

  for(int i = 1; i <= n; ++i){
    int L = 1, R = n;
    for(int j = 1; j <= n; ++j){
      if(a[j][0] < a[i][0] && a[j][0] > a[i][1]){
        if(j < i) L = max(L, j + 1);
        if(j > i) R = min(R, j - 1);
      }
    }
    bad[i] = {L, R};
    for(int j = 1; j <= n; ++j){
      if(a[j][0] > a[i][0] && a[j][1] < a[i][0]){
        if(j < i) L = max(L, j + 1);
        if(j > i) R = min(R, j - 1);
      }
    }
    bad[i][0] = max(bad[i][0], L);
    bad[i][1] = min(bad[i][1], R);
  }

  cin >> q;
  for(;q--;){
    int l, r;cin >> l >> r;
    bool ok = 1;
    for(int j = l; j <= r; ++j){
      if(bad[j][0] <= l && r <= bad[j][1]){
        ok =0 ;
      }
    }
    if(ok) cout << "Yes\n";
    else cout << "No\n";
  }
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  while(tt--){
    solve();
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
} 

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 0 / 10
• Subtask 4: 0 / 31
• Subtask 5: 0 / 8
• Subtask 6: 0 / 12
• Subtask 7: 0 / 18
• Subtask 8: 0 / 12