题解 | #小红的字符生成#

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll>PII;
const int N = 2e5 + 10;
const int MOD = 998244353;
const int INF = 0X3F3F3F3F;
const int dx[] = {-1, 1, 0, 0, -1, -1, +1, +1};
const int dy[] = {0, 0, -1, 1, -1, +1, -1, +1};
const int M = 1e6 + 10;

int main()
{
	int n;
	cin >> n;
	for(int i = 10; i >= 0; i --)
	{
		if(n >> i & 1) cout << char(i + 'a');
	}
	
	return 0;
}