Submission #1171372

#	Time	Username	Problem	Language	Result	Execution time	Memory
1171372		lopkus	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	62 ms	10568 KiB

Main

#include <bits/stdc++.h>

int main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  int n, m;
  std::cin >> n >> m;
  std::vector<int> a(m + 1);
  for(int i = 1; i <= m; i++) {
    std::cin >> a[i];
  }
  std::map<int,int> was;
  int ans = 0;
  for(int i = 1; i <= m; i++) {
    if(a[i] > 0) {
      if(was[a[i]]) {
        ++ans;
        was.clear();
      }
      was[a[i]] = 1;
    }
    else {
      was[-a[i]] = 0;
    }
  }
  std::cout << ans;
}

• Subtask 1: 29 / 29
• Subtask 2: 34 / 34
• Subtask 3: 22 / 22
• Subtask 4: 15 / 15