D. Two Paths 题目连接: http://codeforces.com/contest/14/problem/D Description As you know, Bob's brother lives in Flatland. In Flatland there are n cities, connected by n - 1 two-way roads. The cities are numbered from 1 to n. You can get from one city t…
C. Four Segments 题目连接: http://codeforces.com/contest/14/problem/C Description Several months later Alex finally got his brother Bob's creation by post. And now, in his turn, Alex wants to boast about something to his brother. He thought for a while,…
B. Young Photographer 题目连接: http://codeforces.com/contest/14/problem/B Description Among other things, Bob is keen on photography. Especially he likes to take pictures of sportsmen. That was the reason why he placed himself in position x0 of a long s…
A. Letter 题目连接: http://www.codeforces.com/contest/14/problem/A Description A boy Bob likes to draw. Not long ago he bought a rectangular graph (checked) sheet with n rows and m columns. Bob shaded some of the squares on the sheet. Having seen his mas…
题目链接: http://codeforces.com/contest/14/problem/D D. Two Paths time limit per test2 secondsmemory limit per test64 megabytes 问题描述 As you know, Bob's brother lives in Flatland. In Flatland there are n cities, connected by n - 1 two-way roads. The citie…
Two Paths time limit per test 2 seconds memory limit per test 64 megabytes input standard input output standard output As you know, Bob's brother lives in Flatland. In Flatland there are n cities, connected by n - 1 two-way roads. The cities are numb…
