Geeksforgeeks Solution For " Different ways to Spell a Number "

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Problem :- Given a  number. The number may contain many same continuous digits in it. The task is to count number of ways to spell the number.
For example, consider 8884441100, one can spell it simply as triple eight triple four double two and double zero. One can also spell as double eight, eight, four, double four, two, two, double zero.

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Solution :- 

#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;

ll spellsCount(string num)
{
    int n = num.length();
    ll result = 1;
    for (int i=0; i<n; i++)
    {
       int count = 1;
       while (i < n-1 && num[i+1] == num[i])
       {
           count++;
           i++;
       }
       result = result * pow(2, count-1);
    }
    return result;
}

int main()
{
int t;
    cin>>t;
    while(t--)
    {
    string num ;
    cin>>num;
    cout << spellsCount(num);
    cout<<endl;
}
    return 0;
}

Output:-