|| ||Code Submission Evaluation System
CSES Problem Set
Planets and Kingdoms
Task | Statistics
CSES - Planets and KingdomsCSES - Planets and Kingdoms
|Time limit:||1.00 s
||Memory limit:||512 MB|
A game has $n$ planets, connected by $m$ teleporters. Two planets $a$ and $b$ belong to the same kingdom exactly when there is a route both from $a$ to $b$ and from $b$ to $a$. Your task is to determine for each planet its kingdom.
The first input line has two integers $n$ and $m$: the number of planets and teleporters. The planets are numbered $1,2,\dots,n$.
After this, there are $m$ lines describing the teleporters. Each line has two integers $a$ and $b$: you can travel from planet $a$ to planet $b$ through a teleporter.
First print an integer $k$: the number of kingdoms. After this, print for each planet a kingdom label between $1$ and $k$. You can print any valid solution.
- $1 \le n \le 10^5$
- $1 \le m \le 2 \cdot 10^5$
- $1 \le a,b \le n$
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