 
     
        
 . 

 
      N -    
(1<=N<=100).     (0   ,
1 -  ).      -   .

 
     L -   ( , 
 ).    L+1  -    
  .
   ,    -1.

  
5
0 1 0 0 1
1 0 1 0 0
0 1 0 0 0
0 0 0 0 0
1 0 0 0 0
3 5

  
3
3 2 1 5
