제출 #671064

#제출 시각아이디문제언어결과실행 시간메모리
671064arnold518순열 (APIO22_perm)C++17
99.67 / 100
180 ms19636 KiB
#include "perm.h" #include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; const int INF = 1e9+7; ll K; unordered_map<ll, int> M; int f(ll x) { if(x==1) return 0; if(x==0) return INF; if(M.find(x)!=M.end()) return M[x]; int ret=INF; for(int i=2; i<=6; i++) { ret=min((ll)ret, f(x/i)+i+x%i-1); } return M[x]=ret; } void restore(ll x, vector<pii> &V) { if(x==1) return; for(int i=2; i<=6; i++) { if(f(x/i)+i+x%i-1==f(x)) { restore(x/i, V); V.push_back({i-1, x%i}); return; } } } std::vector<int> construct_permutation(long long _k) { K=_k; vector<int> ans; vector<pii> V; restore(K, V); int cnt=0, cnt2=0; for(auto it : V) { for(int i=0; i<it.second; i++) cnt++, cnt2++; } for(auto it : V) { cnt+=it.first; for(int i=1; i<=it.first; i++) ans.push_back(cnt-i); for(int i=1; i<=it.second; i++) ans.push_back(--cnt2); } return ans; }
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