Submission #705259

#	Time	Username	Problem	Language	Result	Execution time	Memory
705259		veehz	Permutation (APIO22_perm)	C++17	91.33 / 100	2 ms	340 KiB

perm

#include "perm.h"

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

typedef long long ll;

vector<int> construct_permutation(ll k){
	vector<int> pow;
	for(int i=0;i<62;i++){
		if(k&(1LL<<i)){
			pow.push_back(i);
		}
	}
	// cout << "POW" << endl;
	// for(int i=0;i<pow.size();i++){
	// 	cout << pow[i] << " ";
	// }
	// cout << endl;
	vector<int> ans;
	int nxtIdx = 0;
	int nxtNum = pow.back() + pow.size() - 2;
	for(int i=0;i<pow.back();i++){
		if(nxtIdx < pow.size() && i == pow[nxtIdx]){
			ans.push_back(nxtNum);
			nxtNum--;
			nxtIdx++;
		}
		ans.push_back(i);
	}
	// print
	// for(int i=0;i<ans.size();i++){
	// 	cout << ans[i] << " ";
	// }
	return ans;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(ll)':
perm.cpp:24:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   if(nxtIdx < pow.size() && i == pow[nxtIdx]){
      |      ~~~~~~~^~~~~~~~~~~~

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