Submission #1198889

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198889		rxlfd314	Permutation (APIO22_perm)	C++20	91.33 / 100	1 ms	328 KiB

perm

#include "perm.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ari2 = array<int, 2>;
using ari3 = array<int, 3>;
using arl2 = array<ll, 2>;
using arl3 = array<ll, 3>;
template <class T> using vt = vector<T>;
#define all(x) begin(x), end(x)
#define size(x) (int((x).size()))
#define REP(a,b,c,d) for(int a=(b);(d)>0?a<=(c):a>=(c);a+=(d))
#define FOR(a,b,c) REP(a,b,c,1)
#define ROF(a,b,c) REP(a,b,c,-1)

vt<int> construct_permutation(ll k) {
  k--;
  int x = 0;
  for (; (1ll << x + 1) - 2 < k; x++);
  k -= (1ll << x) - 1;
  vt<int> ret(x);
  iota(all(ret), 0);
  ROF(i, x-1, 0)
    if (k >> i & 1) {
      FOR(j, i, size(ret)-1)
        ret[j]++;
      ret.push_back(ret[i] - 1);
    }
  return ret;
}

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