Submission #1305499

#	Time	Username	Problem	Language	Result	Execution time	Memory
1305499		ayaz	Arranging Shoes (IOI19_shoes)	C++20	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
#define isz(x) (int)x.size()

long long count_swaps(std::vector<int> s) {
  vector<int> a = s;
  int n = isz(a);
  if (n == 2) {
    return (a[0] > 0);
  }
  int ans = 0;
  for (int i = 0; i < n; i++) {
    int d = 1e9;
    for (int j = n - 1; j >= 0; j--) {
      if (a[i] + a[j] == 0 && abs(d - i) >= abs(j - i)) {
        d = j;
      }
    }
    if (d == i + 1 || d == i - 1) continue;
    int v = a[d];
    a.erase(a.begin() + d);
    if (d < i)
      a.insert(a.begin() i, v);
    else
      a.insert(a.begin() + 1 + i, v);
    ans += (d > i ? d - (i + 1) : (i - 1) - d);
    // for( auto j : a) cout << j << ' ';
    //   cout << '\n';
  }
  for (int i = 0; i < n; i += 2) {
    ans += (a[i] > 0);
  }
  return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:24:25: error: expected ')' before 'i'
   24 |       a.insert(a.begin() i, v);
      |               ~         ^~
      |                         )