<Codesignal> Extra Number

Easy

You're given three integers, a, b and c. It is guaranteed that two of these integers are equal to each other. What is the value of the third integer?

Example

For a = 2, b = 7, and c = 2, the output should be
extraNumber(a, b, c) = 7.

The two equal numbers are a and c. The third number (b) equals 7, which is the answer.

Input/Output

• [execution time limit] 0.5 seconds (c)

• [input] integer a

  Guaranteed constraints:
  1 ≤ a ≤ 10^9.

• [input] integer b

  Guaranteed constraints:
  1 ≤ b ≤ 10^9.

• [input] integer c

  Guaranteed constraints:
  1 ≤ c ≤ 10^9.

• [output] integer

[C] Syntax Tips

// Prints help message to the console
// Returns a string
char * helloWorld(char * name) {
    char * answer = malloc(strlen(name) + 8);
    printf("This prints to the console when you Run Tests");
    strcpy(answer, "Hello, ");
    strcat(answer, name);
    return answer;
}

---

Solution

int extraNumber(int a,int b,int c)
{
	return a==b&&a!=c?c:a==c&&a!=b?b:a;
}