I have WA and I don't know why.
All tests I've done gave me right answers.
Somebody, please help me, show me my mistakes!!!

Text of program(С++):
#include <iostream.h>
void main()
{
     short M,N;
     int j;
     cout<<"Enter amounts of colors and pieces\n";
     cin>>M>>N;
     cout<<"\nEnter all pieces\n";
     short a[500][50];
     for (int i=0; i<M; i++)
          for ( j=0; j<N; j++)
               cin>>a[i][j];
    short t,z,u=0,kolvo=0,p=0,q=0;

do
{
          for ( i=0; i<M; i++)
          for ( j=0; j<N; j++)
          if(a[i][j]!=(i+1))
          {
               p=j;
               q=i;

               if(u==0)
               t=a[i][j];
               else
               {
               z=a[i][j];
               a[i][j]=t;
               t=z;
               }
               kolvo++;



               for (int k=0; k<N; k++)
                    if (a[t-1][k]!=t)
                    {
                    z=a[t-1][k];
                    a[t-1][k]=t;
                    t=z;
                    u=1;
                    kolvo++;

                    }

                    if (N==1)i=t-2;
                    else
                         i=t-1;
                    j=0;

          }

}while((i<M)&&(j<N));
if(u==1) kolvo--;
cout<<"\nAnswer is="<<kolvo;


}

You haven't to write some code like
cout<<"Enter amounts of colors and pieces\n";

and read FAQ before using Online Judge

Thank you, but sill WA on 6th test.
=(

Try to change short into int>Maybe then you'll get AC.

I've already tried to do as you say,but still WA.