Binary to decimal

 Binary to decimal

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Given a binary number as an integer N, convert it into decimal and print.

Input format :
An integer N in the Binary Format
Output format :
Corresponding Decimal number (as integer)
Constraints :
0 <= N <= 10^9
Sample Input 1 :
1100
Sample Output 1 :
12
Sample Input 2 :
111
Sample Output 2 :
7

#include<iostream>
using namespace std;

int main() {
    // Write your code here
    int pv=1,dec=0,n,rem;
    cin>>n;
    while(n>0){
        rem=n%10;
        dec=dec+rem*pv;
        pv*=2;
        n=n/10;
    }
    
    cout<<dec;
    
}

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