Submission #575916

#	Time	Username	Problem	Language	Result	Execution time	Memory
575916		SHZhang	Permutation (APIO22_perm)	C++17	91.33 / 100	3 ms	356 KiB

perm

#include "perm.h"

using namespace std;

#define ll long long

vector<int> construct_permutation(ll k)
{
	ll maxbit = 0;
	for (ll i = 62; i >= 0; i--) {
		if (k & (1LL << i)) {
			maxbit = i; break;
		}
	}
	vector<int> ops;
	for (ll i = maxbit - 1; i >= 0; i--) {
		ops.push_back(0);
		if (k & (1LL << i)) ops.push_back(1);
	}
	vector<int> ans;
	for (int i = 0; i < ops.size(); i++) {
		if (ops[i] == 0) {
			ans.push_back((int)ans.size());
		} else {
			for (int j = 0; j < ans.size(); j++) ans[j]++;
			ans.push_back(0);
		}
	}
	return ans;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:21:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |  for (int i = 0; i < ops.size(); i++) {
      |                  ~~^~~~~~~~~~~~
perm.cpp:25:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |    for (int j = 0; j < ans.size(); j++) ans[j]++;
      |                    ~~^~~~~~~~~~~~

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