Submission #574681

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
574681	2022-06-09 08:39:03	WongChun1234	Permutation (APIO22_perm)	C++17	100 / 100	3 ms	340 KiB

perm

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#include "perm.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int pos[100];
vector<int> ret,pres;
void add(int newpos){
  for (auto &i:ret) if (i>=newpos) i++;
  ret.push_back(newpos);
  memset(pos,-1,sizeof(pos));
  for (int i=0;i<ret.size();i++) pos[ret[i]]=i;
}
vector<int> construct_permutation(ll k){
  memset(pos,-1,sizeof(pos));
  ret.clear(); pres.clear();
  while (k){
    pres.push_back(k%4);
    k/=4;
  }
  reverse(pres.begin(),pres.end());
  if (pres[0]==1){
  }else if (pres[0]==2){
    add(0);
  }else if (pres[0]==3){
    add(0);
    add(0);
  }
  for (int i=1;i<pres.size();i++){
    if (pres[i]==0){
      add(ret.size());
 
 
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Compilation message (stderr)

perm.cpp: In function 'void add(int)':
perm.cpp:11:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |  for (int i=0;i<ret.size();i++) pos[ret[i]]=i;
      |               ~^~~~~~~~~~~
perm.cpp: In function 'std::vector<int> construct_permutation(ll)':
perm.cpp:28:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |  for (int i=1;i<pres.size();i++){
      |               ~^~~~~~~~~~~~

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