Step by Step solution about How to resolve the algorithm Round-robin tournament schedule step by step in the Go programming language

This Go program simulates a round-robin tournament with a configurable number of players. A round-robin tournament is a type of competition where each player or team plays against every other player or team exactly once.

Here's a breakdown of the code:

1. Package Declaration:

   package main

   This declares that the code belongs to the main package, which is the entry point for any Go program.

2. Function to Rotate a List:

   func rotate(lst []int) {
      len := len(lst)
      last := lst[len-1]
      for i := len - 1; i >= 1; i-- {
          lst[i] = lst[i-1]
      }
      lst[0] = last
   }

   This function takes a slice of integers lst and rotates its elements one position to the left. Essentially, it moves the last element to the first position.

3. Function for Round-Robin Simulation:

   func roundRobin(n int) {
      // Initialize the list of players
      lst := make([]int, n-1)
      for i := 0; i < len(lst); i++ {
          lst[i] = i + 2
      }
   
      // Handle the case of odd number of players by adding a bye
      if n%2 == 1 {
          lst = append(lst, 0) // 0 denotes a bye
          n++
      }
   
      // Simulate round-robin tournament
      for r := 1; r < n; r++ {
          fmt.Printf("Round %2d", r)
          // Rotate the list to simulate next round
          lst2 := append([]int{1}, lst...)
          // Print matchups for the round
          for i := 0; i < n/2; i++ {
              fmt.Printf(" (%2d vs %-2d)", lst2[i], lst2[n-1-i])
          }
          fmt.Println()
          rotate(lst)
      }
   }

   This function simulates a round-robin tournament with n players. It initializes a list of player numbers (excluding player 1) and handles the case of an odd number of players by adding a bye (represented by 0).

   The function then iterates through the rounds of the tournament, printing the matchups for each round. It uses the rotate function to simulate the next round by rotating the list of players.

4. Main Function:

   func main() {
      fmt.Println("Round robin for 12 players:\n")
      roundRobin(12)
      fmt.Println("\n\nRound robin for 5 players (0 denotes a bye) :\n")
      roundRobin(5)
   }

   The main function is the entry point of the program. It prints the results of two round-robin tournaments, one with 12 players and the other with 5 players (with a bye).

In summary, this program simulates a round-robin tournament for a specified number of players. It rotates the player list to simulate the next round and prints the matchups for each round. The program demonstrates how to rotate a list of integers and use it to simulate a round-robin tournament.

package main

import "fmt"

func rotate(lst []int) {
    len := len(lst)
    last := lst[len-1]
    for i := len - 1; i >= 1; i-- {
        lst[i] = lst[i-1]
    }
    lst[0] = last
}

func roundRobin(n int) {
    lst := make([]int, n-1)
    for i := 0; i < len(lst); i++ {
        lst[i] = i + 2
    }
    if n%2 == 1 {
        lst = append(lst, 0) // 0 denotes a bye
        n++
    }
    for r := 1; r < n; r++ {
        fmt.Printf("Round %2d", r)
        lst2 := append([]int{1}, lst...)
        for i := 0; i < n/2; i++ {
            fmt.Printf(" (%2d vs %-2d)", lst2[i], lst2[n-1-i])
        }
        fmt.Println()
        rotate(lst)
    }
}

func main() {
    fmt.Println("Round robin for 12 players:\n")
    roundRobin(12)
    fmt.Println("\n\nRound robin for 5 players (0 denotes a bye) :\n")
    roundRobin(5)
}