[1663. Smallest String With A Given Numeric Value] returns "", why?
thummim45
33

this is my code and i don't know why is this code returns "".

'''
#include <bits/stdc++.h>

class Solution {
public:
string getSmallestString(int n, int k) {

    string s = "";
    int sum = n;
    vector<int> a(n, 1);
    int idx = n - 1;

    while(sum != k)
    {
        sum = 0;
        if( (k-sum) <= 25 )
        {
            a[idx] = (k-sum);
        }
        else if( (k-sum) > 25)
        {
            a[idx] = ('z' - 97);
        }
                    
        idx--;
        
        if (idx == -1)
            break;
        
        for(int i = 0; i < n; i++)
        {
            sum += a[i];
        }
        
        if(sum == k)
            break;
    }
    
    for(int i = 0; i < n; i++)
    {
        s[i] = a[i] + 96;
    }
    
    return s;
    
}

};

'''

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