Submission #918494

#	Time	Username	Problem	Language	Result	Execution time	Memory
918494		tuannm	Permutation (APIO22_perm)	C++17	10 / 100	1008 ms	712 KiB

perm

#include<bits/stdc++.h>
#include "perm.h"
#define pb push_back
using namespace std;

vector<int> construct_permutation(long long k){
    vector<int> ans;
    for(long long N = k; N <= k + 500; ++N){
        if(N % 2 != 0)
            continue;
        multiset<int> tmp;
        vector<int> v;
        for(int i = 1; (1LL << i) <= N; ++i){
            if(N & (1LL << i))
                tmp.insert(i);
        }
        if((int)tmp.size() > N - k + 1)
            continue;
        bool ok = true;
        while((int)tmp.size() < N - k + 1){
            auto it = tmp.lower_bound(2);
            if(it == tmp.end()){
                ok = false;
                break;
            }
            tmp.erase(it);
            int add = *it - 1;
            tmp.insert(add);
            tmp.insert(add);
        }
        if(!ok)
            continue;
        int m = 0;
        for(auto i : tmp)
            m += i;
        for(auto i : tmp){
            vector<int> tttt;
            for(int j = 1; j <= i; ++j)
                tttt.pb(--m);
            reverse(tttt.begin(), tttt.end());
            for(auto j : tttt)
                v.pb(j);
        }
        if(ans.empty() || (int)ans.size() > (int)v.size())
            ans = v;
    }
    return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 90