Automorphic Number

Medium Number Theory & Mathematics
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Problem Statement

Write a C program to check whether a given integer N is an Automorphic number (its square ends in the same digits as N).

Input Format

A single integer N.

Output Format

Print 'Automorphic' if N is automorphic, otherwise 'Not Automorphic'.

Constraints

1 <= N <= 100000

Sample Input

25

Sample Output

Automorphic

Explanation

25 squared is 625, which ends with 25.

Starter Code

#include <stdio.h>

int main() {
    long long n;
    if (scanf("%lld", &n) == 1) {
        // Write your code here
    }
    return 0;
}

Limits

  • Time Limit: 1s
  • Memory Limit: 256MB

Embedded C Programming

Updated: March 15, 2026
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