CSES - Network Breakdown
  • Time limit: 1.00 s
  • Memory limit: 512 MB

Syrjälä's network has n computers and m connections between them. The network consists of components of computers that can send messages to each other.

Nobody in Syrjälä understands how the network works. For this reason, if a connection breaks down, nobody will repair it. In this situation a component may be divided into two components.

Your task is to calculate the number of components after each connection breakdown.


The first input line has three integers n, m and k: the number of computers, connections and breakdowns. The computers are numbered 1,2,\dots,n.

Then, there are m lines describing the connections. Each line has two integers a and b: there is a connection between computers a and b. Each connection is between two different computers, and there is at most one connection between two computers.

Finally, there are k lines describing the breakdowns. Each line has two integers a and b: the connection between computers a and b breaks down.


After each breakdown, print the number of components.


  • 1 \le n \le 10^5
  • 1 \le m \le 2 \cdot 10^5
  • 1 \le k \le m
  • 1 \le a,b \le n



5 5 3
1 2
1 3
2 3
3 4
4 5
3 4
2 3
4 5


2 2 3