OJ Board

It doesn't seem a difficult problem, though i keep getting TLE, I don't know any other way except brute force to solve this problem, here's my C code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX 15
#define SIZE 100001

int compare_strings(char* s1, char* s2)
{
int count ...

I solved it in C after a few WA, in fact the problem description is wrong since it says to use the following format:
#include<string.h>
#include<stdio.h>
int main()
{
<case specific lines>
printf(“\n”);
return 0;
}
but is should be:
#include<string.h>
#include<stdio.h>
int main()
{
<case specific ...

Please someone help me!! I'm really frustrated with this problem, I tried all kind of input and it seems to work fine but still I get WA, even considering duplicate numbers in the same set! I post my code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define BUF 500
#define equal 1 ...

Is there any critical input for this problem? It seems quite easy but I keep getting WA
My program passes the sample output, I don't know why I get WA, here's my C code
edit: I got ACC, I made a silly mistake

Hi everyone, for those who get RTE, I got ACC by using a char array of 10000000 and fgets() for taking input