Submission #306426

#	Time	Username	Problem	Language	Result	Execution time	Memory
306426		quocnguyen1012	Exhibition (JOI19_ho_t2)	C++14	100 / 100	71 ms	4496 KiB

joi2019_ho_t2

#include <bits/stdc++.h>

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define ar array

using namespace std;
typedef long long ll;
typedef pair<int, int> ii;

signed main(void) {
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  #ifdef LOCAL
    freopen("A.INP", "r", stdin);
    freopen("A.OUT", "w", stdout);
  #endif // LOCAL
  int n, m; cin >> n >> m;
  vector<ii> pictures(n);
  vector<int> frames(m);
  for (auto & it : pictures) {
    cin >> it.se >> it.fi;
  }
  for (auto & it : frames) {
    cin >> it;
  }
  sort(pictures.begin(), pictures.end());
  sort(frames.begin(), frames.end());
  int cur = n - 1, res = 0;
  for (int i = m - 1; i >= 0; --i) {
    while (pictures[cur].se > frames[i]) {
      --cur;
    }
    if (cur >= 0) {
      ++res;
      --cur;
    }
  }
  cout << res;
}

• Subtask 1: 10 / 10
• Subtask 2: 40 / 40
• Subtask 3: 50 / 50