OJ Board

One mistake I've found:

You have s[0] ... s[99].
string s[100],s1="";

However, when n=100, the program will use s[100].
for (int i=1;i<=n;i++)
{
do
{
cin >> s[i];
}
while (s[i].length()!=m);
}

I've got the following error with g++-2.95:

tmp.cc: In function `int main()':
tmp.cc:27: `uppercase' undeclared (first use this function)
tmp.cc:27: (Each undeclared identifier is reported only once
tmp.cc:27: for each function it appears in.)

Looks like your problem is floating point error.

Input:
17925078 17931067

Output:
No. of black balls invalid

Hope it helps...

Input: Output of my AC program:

How many times do you run the BFS for 10888?
Can your program solve a case like the following in a reasonable time?

40 40
BBBBBBBBBBBBBBBXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX ...