Quick Answer
Quick Answer
Joe is fond of computer games. Now, he must solve a puzzling situation. In front of his eyes lies a huge map with fortified towns. His enemy is a very powerful and tricky character who can connect and disconnect the towns by giving some commands. Two towns are connected if they have been directly connected or interconnected through some other connected towns at some moment in time. When a town is disconnected it gets isolated and clears its own connection history, not the connection history of the other towns. Each connection is bidirectional. Initially the towns are isolated. Joe is asked to answer quickly if two towns are connected, according to the history of the character' commands.
Write a program which based on input information, counts the number of yes answers and the number of no answers to questions of the kind: is towni
connected with townj
?
Input
Each data set stands for a particular map and the associated character's commands, as follows:
1) The number of towns on the map n (n ≤ 10000);
2) A list of commands of the form:
a) c towni townj
, where towni
and townj
are integers from 1 to nooftowns. The command means that towni
and townj
get connected.
b) d towni
, where towni
is an integer from 1 to nooftowns. The command means that towni
gets disconnected.
c) q towni townj
, where towni
and townj
are integers from 1 to nooftowns. The command stands for the question: is towni
connected with townj
?
d) e, that ends the list of commands Each command is on a separate line.
Commands (a), (b), (c) can appear in any order. The towns' connectivity is updated after each command of type (a) or (b). Each command of type (c) is processed according to the current configuration.
Output
The program prints these two numbers on the same line, in the order: n1
, n2
as shown in sample output.
Example
For example, the input illustrated bellow corresponds to only one data set which stands for a map with 4 fortified towns. The character gives 9 commands. There are n1
yes answered questions and n2
no answered questions.
4 c 1 2 c 3 4 q 1 3 c 2 3 q 1 4 d 2 q 4 1 q 2 4 e
2 , 2