摘要：
DescriptionYou are to write a program that tries to find an optimal coloring for a given graph. Colors are applied to the nodes of the graph and the o... 阅读全文
摘要：
DescriptionIn 1976 the ``Four Color Map Theorem" was proven with the assistance of a computer. This theorem states that every map can be colored using... 阅读全文
摘要：
DescriptionA thief is running away!We can consider the city where he locates as an undirected graph in which nodes stand for crosses and edges stand f... 阅读全文