
   N .     , 
      .     
  ,    .

 
   INPUT.TXT    N -  
 (3<=N<=50),   N   ,   .

 
      -  , 
    ,     
.       .


     ,      X1,Y1, 
  X2,Y2,   R      :
R:=sqrt((X1-X2)*(X1-X2)+(Y1-Y2)*(Y1-Y2));
 R      (, real), 
 sqrt -  ,   .

  INPUT.TXT	
5
0 0
1.3 0
-2 0.1
1 0
10 10	

  OUTPUT.TXT		
1 2 4		

