Submission #931276

#	Time	Username	Problem	Language	Result	Execution time	Memory
931276		djs100201	Permutation (APIO22_perm)	C++17	91.33 / 100	3 ms	348 KiB

perm

#include<bits/stdc++.h>
#include "perm.h"
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2")
#define all(v) v.begin(),v.end()
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
using PP = pair<ll, P>;
const ll n_ =4e5+100, inf = (ll)2e9 * (ll)1e9 + 7, mod = 998244353;
ll n, m, tc = 1, a, b, c, d, sum, x, y, z, base, ans, k;
ll gcd(ll x,ll y){
	if(!y)return x;
	return gcd(y,x%y);
}
vector<int> construct_permutation(long long k){
    vector<int>res,A;
    x=k-1;
    while(x){
        bool flag=0;
        for(int i=59;i>=1;i--){
            a=(1ll<<i);
            if(x%a)continue;
            x=(x-a)/a;
            A.push_back(i);
            flag=true;
            break;
        }
        if(!flag)A.push_back(0),x=(x-1)/2;
    }
    reverse(all(A));
    for(auto nxt:A){
        if(nxt==0)res.push_back(res.size());
        else{
            ll now=res.size()+1;
            for(auto &i:res)i++;
            for(int j=0;j<nxt;j++)res.push_back(now+j);
            res.push_back(0);
        }
    }
    return res;
}

• Subtask 1: 10 / 10
• Subtask 2: 81.333333333 / 90