Submission #1334625

#	Time	Username	Problem	Language	Result	Execution time	Memory
1334625		zhehan	Arranging Shoes (IOI19_shoes)	C++20	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long

long long count_swaps(std::vector<int> s) {
  int n = s.size();
  vector<bool> swapping(n, false);
  vector<int> parity(100000, 0);
  map<int, queue<int>> key;

  for (int i = 0; i < n; ++i) {
    if (s[i] < 0) {
      if (parity[abs(s[i])] == 1) {
        swapping[i] = true;
      }
    } else {
      if (parity[abs(s[i])] == 0) {
        swapping[i] = true;
        key[abs(s[i])].push(i);
      }
    }
    parity[abs(s[i])] = 1 - parity[abs(s[i])];
  }
  int swaps = 0;
  for (int i = 0; i < n; ++i) {
    if (s[i] < 0 && swapping[i]) {
      swaps += abs(key[abs(s[i])].front() - i);
      key[abs(s[i])].pop();
    }
  }
  return swaps;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc3Ixuzz.o: in function `main':
grader.cpp:(.text.startup+0x26b): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status