L1-050 倒数第N个字符串 (15分)

#include <bits/stdc++.h> using namespace std; int l,n; long long s; int arr[12],c; signed main(){ ios::sync_with_stdio(0); cin >> l >> n; scanf("%d %d",&l,&n); s = pow(26,l) - n; do{ arr[c++] = s % 26; s /= 26; }while(s); for(int i = l - 1; i >= 0; i--) cout << (char)(arr[i] + 'a'); return 0; }