Submission #1140462

#	Time	Username	Problem	Language	Result	Execution time	Memory
1140462		Sang	순열 (APIO22_perm)	C++17	91.33 / 100	1 ms	332 KiB

perm

#include<bits/stdc++.h>
using namespace std;

#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i++)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; i--)
#define fi first
#define se second
#define pb push_back
#define ALL(a) (a).begin(), (a).end()
#define task "kbsiudthw"
#define LL long long

typedef vector<int> vi;
typedef pair<int, int> ii;
typedef pair<int, ii> pii;

const int N = 1e5 + 5;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 2277;

vector<int> construct_permutation(long long k){
    vi ans;
    k--;
    int sz = 0;
    while (k){
        FORD(i, 60, 1){
            if (k < (1ll<<i) -1 ) continue;
            k -= (1ll<<i) - 1;
            sz = i;
            break;
        }
        break;
    }

    int s = sz + __builtin_popcountll(k) - 1;
    int cur = 0;
    if (k & 1) ans.pb(cur++);
    FOR (i, 1, sz){
        ans.pb(s - i + 1);
        if ((k>>i) & 1){
            ans.pb(cur++);
        }
    }
    reverse(ALL(ans));
    return ans;

}

//int main(){
//    vi a = construct_permutation(8);
//    for(int &x : a) cout << x << ' ';
//}

• Subtask 1: 10 / 10
• Subtask 2: 81.3333 / 90