My leetcode submissions.
stau.space
1#include <vector>
2#include <iostream>
3#include <bitset>
4using namespace std;
5
6auto countBits(int n) -> vector<int>
7{
8 auto x = 0;
9 auto a = vector<int>(n + 1, 0);
10 for (auto x = 0; auto& k : a)
11 k = bitset<32>(x++).count();
12
13 return a;
14}
15
16auto main() -> int
17{
18 for (auto const& n : countBits(5))
19 std::cout << n << ' ';
20 return 0;
21}
22