Defend
The picture shows four islands connected by bridges. Kalimdor and Northrend reside in the leftmost and rightmost islands, respectively.
Kalimdor decides to invade Northrend. To defend themselves, Northrend decides to blow up some of the bridges such that there is no way for Kalimdor to reach them. Blowing up each bridge has a cost, as indicated by the numbers in the figure.
What is the minimum cost required for Northrend to do so?
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1 solution
