Submission #1132402

#	Time	Username	Problem	Language	Result	Execution time	Memory
1132402		mychecksedad	Bitaro's travel (JOI23_travel)	C++20	0 / 100	14 ms	1864 KiB

travel

/* 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;
ll a[N];
void solve(){
  cin >> n;
  for(int i = 1; i <= n; ++i){
    cin >> a[i];
  }
  cin >> q;
  for(int i = 1; i <= q; ++i){
    ll s = 0; cin >> s;
    ll ans = 0;
    int pos = lower_bound(a+1, a+1+n, s) - a;
    if(pos > n){
      cout << s - a[1] << '\n';
      continue;
    }
    if(pos == 1){
      cout << a[n] - s << '\n';
      continue;
    }
    int cur, l = 0, r = 0;
    if(s - a[pos - 1] <= a[pos] - s){
      l = pos - 1;
      r = pos - 1;
      ans += s - a[pos - 1];
    }else{
      l = pos, r = pos;
      ans += a[pos] - s;
    }
    cur = l;
    while(l != 1 || r != n){
      if(l == 1){
        ans += a[n] - a[cur]; 
        break;
      }
      if(r == n){
        ans += a[cur] - a[1]; 
        break;
      }
      bool flag = 0, flg = 0;
      if(cur == l){
        int L = r, R = n, go = r;
        while(L <= R){
          int m = L+R>>1;
          if(a[m] - a[cur] < a[cur] - a[cur - 1]){
            go = m;
            L = m+1;
          }else{
            R = m - 1;
          }
        }
        if(go == r){
          flag = 1;
        }else{
          ans += a[go] - a[cur];
          cur = go;
          r = cur;
          flg = 1;
        }
      }
      if((cur == r || flag) && !flg){
        int L = 1, R = l, go = l;
        while(L <= R){
          int m = L+R>>1;
          if(a[cur] - a[m] <= a[cur + 1] - a[cur]){
            go = m;
            R = m-1;
          }else{
            L = m + 1;
          }
        }
        assert(l != go);
        ans += a[cur] - a[go];
        cur = go;
        l = go;
      }
    } 
    cout << 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;
} 

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 30
• Subtask 4: 0 / 55