Submission #208324

#	Time	Username	Problem	Language	Result	Execution time	Memory
208324		alexxela12345	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

long long count_swaps(vector<int> a) {
  int n = a.size() / 2;
  long long ans = 0;
  while (n) {
    int x = a[0];
    int ind = 1;
    while (a[ind] != -x) {
      ind++;
    }
    if (x < 0) {
      ans += ind - 1;
    } else {
      ans += ind;
    }
    a.erase(a.begin() + ind);
    a.erase(a.begin());
    n--;
  }
  return ans;
}

Compilation message (stderr)

shoes.cpp:1:23: error: 'vector' was not declared in this scope
 long long count_swaps(vector<int> a) {
                       ^~~~~~
shoes.cpp:1:30: error: expected primary-expression before 'int'
 long long count_swaps(vector<int> a) {
                              ^~~