Finding the next palindrome

For a given positive integer K of not more than 1000000 digits, write the value of the smallest palindrome larger than K to output. Numbers are always displayed without leading zeros.

The first line contains integer t, the number of test cases. Integers K are given in the next t lines.

For each K, output the smallest palindrome larger than K.

Here is my code.

#include <stdio.h>

int pal(int n)
{
    int temp,rev=0;
    temp=n;
    while(temp)
    {
        rev=rev*10+(temp%10);
        temp/=10;
    }
    if(n==rev)
    {
        return 0;
    }
    return 1;
}
int main()
{

    int n;
    scanf("%d",&n);
    int i=0,j,num[n];

    while(n--)
    {
        scanf("%d",&num[i++]);
    }
    for(i=0;i<n;i++)
    {
        j=num[i]+1;
        while(j>num[i])
        {
            if(pal(j)==0)
            {
                printf("%d",j);
                break;
            }
            else
            {
                j++;
            }
        }
        printf("\n");
    }
    return 0;
}

I cannot guess what is the error. Someone help. I'm not getting the output