OJ Board

Hi all, i got WA, but i don't understand why. Please help my.
#include <iostream>
using namespace std;
int main()
{
int m = 1, n = 1, a[110][110], nom = 0;
char s[110];
while (m || n)
{
nom++;
cin >> m >> n;
for (int i = 1; i <= m; i++)
{
cin >> s;
for (int j = 0; j <= n; j++)
{
if (s ...