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OK, yes, I could use other functions as well.
I just adapted the code from Cho:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

char txt[1024][1024], ptn[1024][1024];

int main()
{
int M, N, Y, X, T, i;
int len, zero = 0, *nullpt = 0;

for(scanf("%d", &T); T--; )
{
scanf("%d %d\n ...

I fear there is something wrong with the input.

I wrote a program that reads a whole matrix definition in one call to fread. But no matter if I assumed exactly one newline following the matrix size, or used gets to first read to the end of the line with the dimensions, or had scanf skip all ...

I had a lot of WA today, too. Did you try with unsigned (C, C++) or long (Java)? This solved the problem for me.

I have a Program using natural logarithm that gets accepted.

But I have to apply a little bit of correction, because when the actual result is very close to an integer, numeric error might lead to the number being actually rounded to an integer one too small. So I add 1e-14 and it works.

I did so and together with Carlos we found that lgamma is not part of ANSI C and was therefore not declared, so my program tried to pass the parameter as an integer. That happens if you don't compile with "-ansi -Wall"...

See also Topic 1866.

I also tried this simple recursion: Result: some permutations occur several times, up to 36. Thus others must be missing.

Greetings!

Hello!

First thing: after the following code I'm going to discuss different solution strategies, so if you want to think for yourself, please don't read on. But this code is fine to use, since it is way too slow for the judge. But it does create exact results, since it really calculates the ...