Pakkaus

#include <bits/stdc++.h>
using namespace std;
string c,d;
int b,e,f,i;
int main(){
    ios_base::sync_with_stdio(0);
cin.tie(0);
cin>>c;

  while(isdigit(c[i]) || isalpha(c[i])){ 
    
      while(isdigit(c[i])){i++;
                      e++  ; }
       
       b=stoi(c.substr(f,e));
  f=i;
  e=0;
      while(isalpha(c[i])){i++;
                        e++;  }
      
    d=c.substr(f,e);
      f=i;
      e=0;
    for(int j=0; j<b; j++) cout<<d;
  
  
    
  }
           
    }
       

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED