#AT1935. C - Swiss-System Tournament
C - Swiss-System Tournament
C - Swiss-System Tournament
Score : $300$ points
Problem Statement
$2N$ players, with ID numbers $1$ through $2N$, will participate in a rock-scissors-paper contest.
The contest has $M$ rounds. Each round has $N$ one-on-one matches, where each player plays in one of them.
For each $i=0, 1, \ldots, M$, the players' ranks at the end of the $i$-th round are determined as follows.
- A player with more wins in the first $i$ rounds ranks higher.
- Ties are broken by ID numbers: a player with a smaller ID number ranks higher.
Additionally, for each $i=1, \ldots, M$, the matches in the $i$-th round are arranged as follows.
- For each $k=1, 2, \ldots, N$, a match is played between the players who rank $(2k-1)$-th and $2k$-th at the end of the $(i-1)$-th round.
In each match, the two players play a hand just once, resulting in one player's win and the other's loss, or a draw.
Takahashi, who can foresee the future, knows that Player $i$ will play $A_{i, j}$ in their match in the $j$-th round, where $A_{i,j}$ is G
, C
, or P
.
Here, G
stands for rock, C
stands for scissors, and P
stands for paper. (These derive from Japanese.)
Find the players' ranks at the end of the $M$-th round.
Rules of rock-scissors-paper
The result of a rock-scissors-paper match is determined as follows, based on the hands played by the two players.- If one player plays rock (G) and the other plays scissors (C), the player playing rock (G) wins.
- If one player plays scissors (C) and the other plays paper (P), the player playing scissors (C) wins.
- If one player plays paper (P) and the other plays rock (G), the player playing paper (P) wins.
- If the players play the same hand, the match is drawn.
Constraints
- $1 \leq N \leq 50$
- $1 \leq M \leq 100$
- $A_{i,j}$ is
G
,C
, orP
.
Input
Input is given from Standard Input in the following format:
Output
Print $2N$ lines.
The $i$-th line should contain the ID number of the player who ranks $i$-th at the end of the $M$-th round.
2 3
GCP
PPP
CCC
PPC
3
1
2
4
In the first round, matches are played between Players $1$ and $2$, and between Players $3$ and $4$. Player $2$ wins the former, and Player $3$ wins the latter.
In the second round, matches are played between Players $2$ and $3$, and between Players $1$ and $4$. Player $3$ wins the former, and Player $1$ wins the latter.
In the third round, matches are played between Players $3$ and $1$, and between Players $2$ and $4$. Player $3$ wins the former, and Player $4$ wins the latter.
Therefore, in the end, the players are ranked in the following order: $3,1,2,4$, from highest to lowest.
2 2
GC
PG
CG
PP
1
2
3
4
In the first round, matches are played between Players $1$ and $2$, and between Players $3$ and $4$. Player $2$ wins the former, and Player $3$ wins the latter.
In the second round, matches are played between Players $2$ and $3$, and between Players $1$ and $4$. The former is drawn, and Player $1$ wins the latter.
Therefore, in the end, the players are ranked in the following order: $1,2,3,4$, from highest to lowest.