#include <iostream>
using namespace std;
 
int main() {
    unsigned int number;
    cout << "Enter a natural number: ";
    cin >> number;
 
    unsigned int sumOdd = 0;
    unsigned int temp = number;
 
    while (temp > 0) {
        unsigned int digit = temp % 10;  // get last digit
        if (digit % 2 != 0) {           // check if digit is odd
            sumOdd += digit;            // add to sum
        }
        temp = temp / 10;               // remove last digit
    }
 
    cout << "Sum of odd digits in " << number << " is " << sumOdd << endl;
 
    return 0;
}
 

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