90求调

#include<bits/stdc++.h>
using namespace std;
char a[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
char ans[1001]; 
int main () {
	long long x, m;
	cin >> x >> m;
	long long i = 0;
	while ( x != 0 ) {
		long long t = x % m;
		x = x / m;
		ans[i++] = a[t];
	}
	for ( int j = i - 1; j >= 0; j-- ) 
	cout << ans[j];
	return 0;
}