<Codesignal> Is Tandem Repeat?

Easy

Determine whether the given string can be obtained by one concatenation of some string to itself.

Example

• For inputString = "tandemtandem", the output should be
  isTandemRepeat(inputString) = true;
• For inputString = "qqq", the output should be
  isTandemRepeat(inputString) = false;
• For inputString = "2w2ww", the output should be
  isTandemRepeat(inputString) = false.

Input/Output

• [execution time limit] 0.5 seconds (c)

• [input] string inputString

  Guaranteed constraints:
  2 ≤ inputString.length ≤ 20.

• [output] boolean

  • true if inputString represents a string concatenated to itself, false otherwise.

[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

bool isTandemRepeat(char *inputString)
{
	for(int i=0;i<strlen(inputString)/2;i++)
		if(inputString[i]!=inputString[strlen(inputString)/2+i])
			return false;

	return strlen(inputString)%2==0;
}