제출 #1270475

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1270475		flashmt	Bikeparking (EGOI24_bikeparking)	C++20	100 / 100	377 ms	28620 KiB

Main

#include <bits/stdc++.h>
#ifdef LOCAL
#include "Debug.h"
#else
#define debug(...) 42
#endif
using namespace std;

int main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n;
  while (cin >> n)
  {
    map<int, int> a, b;
    for (int i = 0; i < n; i++)
    {
      int x;
      cin >> x;
      if (x)
        a[i] = x;
    }
    for (int i = 0; i < n; i++)
    {
      int x;
      cin >> x;
      if (x)
        b[i] = x;
    }

    int ans = 0;
    for (int i = n - 1; i >= 0; i--)
      if (b.count(i))
      {
        while (1)
        {
          auto u = a.lower_bound(i);
          if (u == begin(a))
            break;
          u--;

          auto v = b.upper_bound(u->first);
          if (v == end(b))
            break;

          int use = min(u->second, v->second);
          ans += use;

          a[u->first] -= use;
          if (a[u->first] == 0)
            a.erase(u->first);

          b[v->first] -= use;
          if (b[v->first] == 0)
            b.erase(v->first);
        }
      }

    for (int i = 0; i < n; i++)
      ans -= max(0, b[i] - a[i]);

    cout << ans << endl;
  }
}

• Subtask 1: 16 / 16
• Subtask 2: 9 / 9
• Subtask 3: 19 / 19
• Subtask 4: 24 / 24
• Subtask 5: 32 / 32