Submission #1062295

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062295		kunzaZa183	Port Facility (JOI17_port_facility)	C++17	10 / 100	283 ms	428 KiB

port_facility

#include <bits/stdc++.h>
using namespace std;
int main() {
  // cin.tie(0)->sync_with_stdio(0);
  // cin.exceptions(cin.failbit);
  int n;
  cin >> n;
  vector<pair<int, int>> vpii(n);
  struct event {
    int tim;
    bool ins;
    int val;
    event() { tim = -1, ins = 0, val = -1; }
    event(int a, int b, int c) { tim = a, ins = b, val = c; }
    bool operator<(event x) const { return tim < x.tim; }
  };
  vector<event> times; // tim id
  for (int i = 0; i < vpii.size(); i++) {
    cin >> vpii[i].first >> vpii[i].second;
    times.emplace_back(vpii[i].first, 1, i);
    times.emplace_back(vpii[i].second, 0, i);
  }
  sort(times.begin(), times.end());
  int ct = 0;
  for (int i = 0; i < (1 << n); i++) {
    vector<int> A, B;
    for (auto a : times)
      if (a.ins) {
        if (i & (1 << a.val)) {
          A.push_back(a.val);
        } else {
          B.push_back(a.val);
        }
      } else {
        if (!A.empty())
          if (A.back() == a.val) {
            A.pop_back();
            goto B;
          }
        if (!B.empty())
          if (B.back() == a.val) {
            B.pop_back();
            goto B;
          }
        goto A;
      B:;
      }
    ct++;
  A:;
  }
  cout << ct << "\n";
}

Compilation message (stderr)

port_facility.cpp: In function 'int main()':
port_facility.cpp:18:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |   for (int i = 0; i < vpii.size(); i++) {
      |                   ~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 56
• Subtask 4: 0 / 22