Eng katta va eng kichikning yig'indisi

Uchta son a, b, c berilgan. Ulardan eng kattasini va eng kichigini topib, ularning yig'indisini qaytaring.

func minAndMax(a int, b int, c int) int {
    // ...
}

Misollar

Input: a=5, b=3, c=7
Output: 10

Input: a=2, b=8, c=4
Output: 10

Input: a=9, b=1, c=6
Output: 10

Input: a=-5, b=0, c=5
Output: 0

Maslahatlar

1. Avval max va min o'zgaruvchilariga a ni yozing, so'ng b va c ni if bilan solishtirib yangilang.
2. Oxirida max + min ni qaytaring.