   - 1

          .
       NxM,   
    .   
    (  ,  
 ,       ),   
,     .

   .  ,   
 .

 
     .   
 N,  -   M (1<=N<=20,1<=M<=20).
  N   M    -  
,      (  0  50).
   X -    . 
    (  -   :
   ,  -  , 
      (1,1),   - (N,M)).
,           .

 
      ,   .

  
3 4
1 2 3 4
5 6 7 8
9 10 11 12
5
1 1
2 1
2 2
2 3
1 3

  
22
