--------------------
                   /\
   /|\           /    \
    |          /        \
    |        R4          R1
  100 v    /               \
    |      ------- R3 ------
    |      \               /
    |        R5          R2
    |          \        /
    |            \    /
                   \/
--------------------
 R1=  10   R2 =  35   R3 =  20   R4 =  50  R5 =  25 
 current in R1  =  3 
 current in R2  =  2 
 current in R3  =  1 
 current in R4  =  1 
 current in R5  =  2 
 ++++++++++++++++++++++++++++++++++++++++++++++++++
 R1=  20   R2 =  15   R3 =  10   R4 =  5  R5 =  40 
 current in R1  =  2 
 current in R2  =  4 
 current in R3  =  2 
 current in R4  =  4 
 current in R5  =  2 
 ++++++++++++++++++++++++++++++++++++++++++++++++++
 R1=  25   R2 =  50   R3 =  20   R4 =  35  R5 =  10 
 current in R1  =  2 
 current in R2  =  1 
 current in R3  =  1 
 current in R4  =  2 
 current in R5  =  3 
 ++++++++++++++++++++++++++++++++++++++++++++++++++
 R1=  30   R2 =  10   R3 =  20   R4 =  5  R5 =  40 
 current in R1  =  2 
 current in R2  =  4 
 current in R3  =  2 
 current in R4  =  4 
 current in R5  =  2 
 ++++++++++++++++++++++++++++++++++++++++++++++++++
 R1=  35   R2 =  10   R3 =  20   R4 =  25  R5 =  50 
 current in R1  =  2 
 current in R2  =  3 
 current in R3  =  1 
 current in R4  =  2 
 current in R5  =  1 
 ++++++++++++++++++++++++++++++++++++++++++++++++++
 R1=  40   R2 =  5   R3 =  10   R4 =  15  R5 =  20 
 current in R1  =  2 
 current in R2  =  4 
 current in R3  =  2 
 current in R4  =  4 
 current in R5  =  2 
 ++++++++++++++++++++++++++++++++++++++++++++++++++
 R1=  40   R2 =  5   R3 =  20   R4 =  10  R5 =  30 
 current in R1  =  2 
 current in R2  =  4 
 current in R3  =  2 
 current in R4  =  4 
 current in R5  =  2 
 ++++++++++++++++++++++++++++++++++++++++++++++++++
 R1=  50   R2 =  25   R3 =  20   R4 =  10  R5 =  35 
 current in R1  =  1 
 current in R2  =  2 
 current in R3  =  1 
 current in R4  =  3 
 current in R5  =  2 
 ++++++++++++++++++++++++++++++++++++++++++++++++++