Submission #975655

#	Time	Username	Problem	Language	Result	Execution time	Memory
975655		ShaShi	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	596 KiB

perm

#include "perm.h"
#include <bits/stdc++.h>
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define mp make_pair
#define pii pair<int, int>



using namespace std;

typedef long long ll;


const int MAXN = (int)1e6 + 7;
const int LG = 60;


vector<int> construct_permutation(ll k) {
	vector<int> res;

	bool flag = 0;

	for (int i=LG-1; i>=0; i--) {
		if (!(k&(1ll<<i))) continue;

		// for (int j:res) cout << j << " ";
		// cout << endl;
		// cout << "!" << i << endl;

		if (!flag) {
			for (int j=1; j<=i; j++) res.pb(j);
			flag = 1;

			continue;
		}

		for (int j=0; j<res.size(); j++) if (res[j] >= i+1) res[j]++;
		res.pb(i+1);
	}

	for (int i=0; i<res.size(); i++) res[i]--;

	return res;
}



// int main() {
// 	vector<int> res = construct_permutation(42);

// 	for (int i:res) cout << i << " ";


// 	return 0;
// }

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(ll)':
perm.cpp:40:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |   for (int j=0; j<res.size(); j++) if (res[j] >= i+1) res[j]++;
      |                 ~^~~~~~~~~~~
perm.cpp:44:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |  for (int i=0; i<res.size(); i++) res[i]--;
      |                ~^~~~~~~~~~~

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