#include <iostream>
#include <cmath>
using namespace std;
int octalToDecimal(int octalNumber);
// Function to convert octal number to decimal
int octalToDecimal(int octalNumber)
{
int decimalNumber = 0, i = 0, rem;
while (octalNumber != 0)
{
rem = octalNumber % 10;
octalNumber /= 10;
decimalNumber += rem * pow(8, i);
++i;
}
return decimalNumber;
}