#include < iostream.h>

int main()
{
    long int binarynum, octalnum = 0, j = 1, remainder;
    cout<<"Enter the value for binary number: ";
    cin>>binarynum;
    while (binarynum != 0)
        {
            remainder = binarynum % 10;
            octalnum = octalnum + remainder * j;
            j = j * 2;
            binarynum = binarynum / 10;
        }
    cout<<"Equivalent octal value:"<<octalnum;
    return 0;
}