TASK

Problem

#63

In “Reverse Three Digits”, given the required decimal number, reverse its digits.

EXAMPLE

Example

Input

123

Output

321

LIMITS

Constraints

The number has exactly the number of decimal digits stated in the task and is non-negative.

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LEARN Theory for this problem

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Repeated division by powers of 10 and `% 10` isolate decimal digits without converting the number to a string.

Connection to “Reverse Three Digits”: here, integer `/` and `%` provide the quotient and remainder, which is useful for digit extraction and cyclic arithmetic.

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NEED HELP? Hints

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['Extract the digits first, then combine or compare them.', 'After solving “Reverse Three Digits”, verify the algorithm on your own small example and on an allowed boundary case. Print only the required result with no extra text.']

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ANSWER Solution

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#include <iostream>
#include <algorithm>
using namespace std;
int main() {
    int n;
    cin >> n;
    cout << (n % 10) * 100 + ((n / 10) % 10) * 10 + n / 100 << '\n';
    return 0;
}