package main

// removeDuplicates 去除数组重复数据
func removeDuplicates(bondIds []int) []int {
	unique := make(map[int]struct{}) // 使用 struct{} 作为值，占用内存小
	result := []int{}

	for _, id := range bondIds {
		if _, exists := unique[id]; !exists {
			unique[id] = struct{}{}
			result = append(result, id)
		}
	}
	return result
}