Problem:
Score : 300 points

Problem Statement

1000000000000001 dogs suddenly appeared under the roof of Roger's house, all of which he decided to keep. The dogs had been numbered 1 through 1000000000000001, but he gave them new names, as follows:

the dogs numbered 1,2,\cdots,26 were respectively given the names a, b, ..., z;

the dogs numbered 27,28,29,\cdots,701,702 were respectively given the names aa, ab, ac, ..., zy, zz;

the dogs numbered 703,704,705,\cdots,18277,18278 were respectively given the names aaa, aab, aac, ..., zzy, zzz;

the dogs numbered 18279,18280,18281,\cdots,475253,475254 were respectively given the names aaaa, aaab, aaac, ..., zzzy, zzzz;

the dogs numbered 475255,475256,\cdots were respectively given the names aaaaa, aaaab, ...;

and so on.

To sum it up, the dogs numbered 1, 2, \cdots were respectively given the following names:

a, b, ..., z, aa, ab, ..., az, ba, bb, ..., bz, ..., za, zb, ..., zz, aaa, aab, ..., aaz, aba, abb, ..., abz, ..., zzz, aaaa, ...

Now, Roger asks you:

"What is the name for the dog numbered N?"

Constraints

N is an integer.

1 \leq N \leq 1000000000000001

Input

Input is given from Standard Input in the following format:

N

Output

Print the answer to Roger's question as a string consisting of lowercase English letters.

Sample Input 1

2

Sample Output 1

b

Sample Input 2

27

Sample Output 2

aa

Sample Input 3

123456789

Sample Output 3

jjddja

Solution in C++ (GCC 9.2.1) (judge verdict: Wrong Answer)


/*  In the name of ALLAH */

#include<bits/stdc++.h>
using namespace std;
/*******  All Required define Pre-Processors and Constants    *******/

#define int long long
#define ull unsigned long long 
#define ld long double
#define mem(a, b) memset(a, (b), sizeof(a))
#define rep(i, j, k) for (int i = j ; i < k ; ++i)
#define rrep(i, j, k) for (int i = j; i > k; --i)
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define foreach(i, a) for(auto i: a)
#define forEach(it, l) for (auto it = l.begin(); it != l.end(); it++)
#define in(A, B, C) assert( B <= A && A <= C)
#define debug(a) cout << #a << ": " << a << endl
#define Flag(n) cout << "here " << n << endl
#define w(x) int x;cin>>x;while(t--)
#define mp make_pair
#define pb push_back

#define endl '\n';
#define io ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
const int POSITIVE_INFINITY = 9223372036854775807;
const int NEGATIVE_INFINITY = -9223372036854775807;
const int MOD = 1000000007;
const ld PI = acos(-1.0);
 

#define TRACE
#ifdef TRACE
#define see(...) __f(#__VA_ARGS__,__VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1){
    cerr<<name<<" : "<<arg1<<endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args){
    const char* comma=strchr(names+1,',');cerr.write(names,comma-names)<<" : "<<arg1<<" | ";__f(comma+1, args...);
}
#else
#endif



int32_t main() {
    io;
    // freopen("input.txt","r",stdin); 
    // freopen("output.txt","w",stdout);
  
    int n;
    cin>>n;
 
    char a = '`';//char('a'-1);
    cout<<char(a+1)<<endl;
    int pos = 0;
    string s  = "";
    while(n>26){
        s+=char(a + n%26);
        n/=26;
    }
    s+=char(a+n);
    for(int i =s.size()-1;i>=0;i--)
    cout<<s[i];
    
 
    return 0;
}