
ZOJ Problem Set  2833
Now you've grown up, it's time to make friends. The friends you make in university are the friends you make for life. You will be proud if you have many friends. Input There are multiple test cases for this problem. Each test case starts with a line containing two integers N, M (1 <= N <= 100'000, 1 <= M <= 200'000), representing that there are totally N persons (indexed from 1 to N) and M operations, then M lines with the form "M a b" (without quotation) or "Q a" (without quotation) follow. The operation "M a b" means that person a and b make friends with each other, though they may be already friends, while "Q a" means a query operation. Friendship is transitivity, which means if a and b, b and c are friends then a and c are also friends. In the initial, you have no friends except yourself, when you are freshman, you know nobody, right? So in such case you have only one friend. Output For each test case, output "Case #:" first where "#" is the number of the case which starts from 1, then for each query operation "Q a", output a single line with the number of person a's friends. Separate two consecutive test cases with a blank line, but Do NOT output an extra blank line after the last one. Sample Input
3 5 Sample Output
Case 1: Notes This problem has huge input and output data, please use 'scanf()' and 'printf()' instead of 'cin' and 'cout' to avoid time limit exceed. Author: LIU, Yaoting Source: Zhejiang University Local Contest 2007, Preliminary 