1092A - Uniform String - CodeForces Solution

#include <bits/stdc++.h>
#include <time.h>
using namespace std;
#define int long long 
#define CIN(x)  for(auto &i : x) \
                    cin>>i;                          
#define deb(x) cout<<#x <<' '<<x<<nl;
#define ios ios::sync_with_stdio(0); \
cin.tie(0);\

void read(){
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout); 
}
//////////////////////////////////////////////////
const int INF = INT_MAX;

void solve(){
    int n , k; cin>>n>>k;
    vector<char>arr(26);
    for(int i = 0 ; i < 26 ; ++i)
        arr[i] = i + 'a';
    string s = "";
    for(int i = 0 ; i < n ; ++i)
        cout<<arr[i % k];
    cout<<'\n';
}

signed main(){ ios
   // read();
    int tt = 1;
    cin>>tt;
    for(int t = 1 ; t <= tt ; ++t){
        solve();
    }

    return 0;
}