Submission #1175086

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1175086	2025-03-28 02:15:24	bangan	Arranging Shoes (IOI19_shoes)	C++20	100 / 100	52 ms	20652 KiB

shoes

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#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
// #define int long long
#define pb push_back
long long count_swaps(std::vector<int> s) {
  #define int long long
  
  int n = (int)s.size();
  
  vector<vector<int>> pos(n + 1), neg(n + 1);
  for (int i = n - 1; i >= 0; i--) {
    if (s[i] < 0) {
      neg[-s[i]].pb(i);
    }
    else {
      pos[s[i]].pb(i);
    }
  }
  
  vector<int> fen(2 * n);
  auto update = [&](int i, int v) {
    for (++i ; i < 2 * n; i += i & -i) {
      fen[i] += v;
    }
  };
  auto sum = [&](int i) {
    int ret = 0;
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 15 / 15