Submission #883891

#	Time	Username	Problem	Language	Result	Execution time	Memory
883891		vjudge1	Passport (JOI23_passport)	C++17	40 / 100	2087 ms	54156 KiB

passport

/* 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'
const int N = 2500+100, M = 1e5+10, K = 21;


int n, dp[N][N];  
array<int, 2> a[N];
int dfs(int l, int r){
  if(dp[l][r] != MOD) return dp[l][r];
  for(int i = l; i <= r; ++i){
    int L = min(l, a[i][0]);
    int R = max(r, a[i][1]);
    if(R > r || L < l)
      dp[l][r] = min(dp[l][r], dfs(L, R) + 1);
  }
  return dp[l][r];
}
void solve(){
  cin >> n;
  for(int i = 1; i <= n; ++i) cin >> a[i][0] >> a[i][1]; 
  int q; cin >> q;
  for(int i = 1; i <= q; ++i){
    for(int i = 1; i <= n; ++i) for(int j = 1; j <= n; ++j) dp[i][j] = MOD;
    dp[1][n] = 0; 
    int v; cin >> v;
    int ans = dfs(v, v);
    cout << (ans == MOD ? -1 : ans) << '\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;
} 

Compilation message (stderr)

passport.cpp: In function 'int main()':
passport.cpp:41:15: warning: unused variable 'aa' [-Wunused-variable]
   41 |   int tt = 1, aa;
      |               ^~

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