Submission #681156

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
681156	2023-01-12 12:44:06	QwertyPi	Permutation (APIO22_perm)	C++17	100 / 100	2 ms	340 KiB

perm

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#include "perm.h"
#include <bits/stdc++.h>
using namespace std;
std::vector<int> construct_permutation(long long k){
  vector<int> ans;
  int l = 0, r = 1;
  int mn0 = -1, mn1 = -1;
  int b = 59;
  while(~k & (1LL << b)) b--;
  for(b--; b >= 0;){
    if(b >= 1 && (k >> b - 1) % 2 && (k >> b) % 2 && mn0 != -1 && mn1 != -1){
      ans.push_back(r++);
      ans.push_back(r++);
      ans[mn0]--; ans[mn1]--;
      ans.push_back(l + 2); l--;
      b -= 2;
    }else{
      if((k >> b) % 2){
        ans.push_back(r++);
        mn0 = mn1; mn1 = ans.size();
        ans.push_back(l--);
      }else{
        ans.push_back(r++);
      }
      b--;
    }
  }
  int mn = *min_element(ans.begin(), ans.end());
 
 
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Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:13:24: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   13 |   if(b >= 1 && (k >> b - 1) % 2 && (k >> b) % 2 && mn0 != -1 && mn1 != -1){
      |                      ~~^~~

• Subtask 1: 10 / 10
• Subtask 2: 90 / 90