| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 718372 | 2023-04-04T01:10:45 Z | lam | 화성 (APIO22_mars) | C++17 | 0 ms | 0 KB |
#include "perm.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
vector<int> construct_permutation(long long k)
{
vector <int> res;
ll len = 0;
while (1LL<<(len+1)<=k) len++;
// cerr<<len<<endl;
vector <int> a;
for (int i=1; i<=len; i++) a.push_back(i-1);
k-=(1LL<<len);
while (k>0)
{
ll it = 0;
while ((1LL<<(it+1))<= k)
{
it++;
}
k-= (1LL<<it);
a.push_back(it);
}
int n=a.size();
vector <int> d(n+1,0);
for (int i=0; i<n; i++) d[a[i]] ++;
for (int i=1; i<=n; i++) d[i]+=d[i-1];
res.resize(n);
for (int i=0; i<n; i++) res[i] = --d[a[i]];
// for (int i:a) cerr<<i<<' '; cerr<<endl;
// for (int i:res) cerr<<i<<' '; cerr<<endl;
vector <int> v=res;
sort(v.begin(),v.end());
for (int i=0; i<n; i++) assert(v[i]==i);
return res;
}