package main
import (
"fmt"
)
func groupElements(arr []int) []int {
frequency := make(map[int]int)
order := []int{}
result := []int{}
// Count frequencies and track first occurrences
for _, num := range arr {
if _, exists := frequency[num]; !exists {
order = append(order, num)
}
frequency[num]++
}
// Group elements based on first occurrence
for _, num := range order {
for i := 0; i < frequency[num]; i++ {
result = append(result, num)
}
}
return result
}
func main() {
vec := []int{88, 33, 77, 88, 22, 55, 88, 55, 11, 99, 88, 11, 77}
grouped := groupElements(vec)
fmt.Print("Grouped vector: ")
for _, num := range grouped {
fmt.Printf("%d ", num)
}
fmt.Println()
}
/*
run:
Grouped vector: 88 88 88 88 33 77 77 22 55 55 11 11 99
*/
