CodeforcesEducational Codeforces Round 180 (Rated for Div. 2)Educational Codeforces Round 180 (Rated for Div. 2)本节提供 Educational Codeforces Round 180 (Rated for Div. 2) 的题解。A. Race B. Shrinking Array C. Coloring Game D. Reachability and Tree E. Tree Colorings