Submission #912463

#	Time	Username	Problem	Language	Result	Execution time	Memory
912463		agusss	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

long long count_swaps(std::vector<int> s) {
  vector<bool> used(s.size(), false);
  long long cnt = 0;
  // cout << "size:" << s.size() << "\n";
  for (int i = 0; i < s.size(); i++) {
    int j;
    if (used[i]) {
      continue;
    }
    // cout << "to pair" << i << "\n";
    for (j = i + 1; j < s.size(); j++) {
      if (s[j] == -s[i] and !used[j]) {
        used[j] = true;
        break;
      }
    }
    if (j < s.size()) {
      // cout << i << ", " << j << "\n";
      long long distance = j - i - (s[i] < 0 ? 1 : 0);
      cnt += distance;
    }
  }
	return cnt;
}

Compilation message (stderr)

shoes.cpp:1:28: error: 'vector' is not a member of 'std'
    1 | long long count_swaps(std::vector<int> s) {
      |                            ^~~~~~
shoes.cpp:1:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
  +++ |+#include <vector>
    1 | long long count_swaps(std::vector<int> s) {
shoes.cpp:1:35: error: expected primary-expression before 'int'
    1 | long long count_swaps(std::vector<int> s) {
      |                                   ^~~