analysis
Part 1 template problems
Template title optimal ratio spanning tree, 01 planning
but!
He often card
So, the children obediently write it Dinkelbach
Part 2 01 scores planning
Welcome to visit my Blog: 01 points plan
Part 3 minimum
Our request is
The minimum value of R, (x [i] [j] is selected if the representative of this edge)
Transposition transform a little bit, it becomes:
As can be seen, when R decreases, the value of the expression to the left increases.
If the R value for a certain determined value of the left side is smaller than 0;
It means that there is a smaller value of R is closer to the left to make expression 0
In this way, we can increase the value of R validate again until you find the minimum R-value up