OJ Board

Hi!
I get WA but I don't understand what's wrong in my code.
Please, will you give me a hand?
Thanks very much!
Bye :D

[c]
#include <stdio.h>


void fun (int);

int a [20], b [20]; /* a: left subtree's + root's piles
b: rigth subtree's piles */

int main(){

int i, num;

num = 1;

while (1 ...