}
			return a
		}
		lsum = func(s []int64) int64 {
			sum := int64(0)
			for _, i := range s {
				if i < 0 {
					return -1
				}
				sum += i
			}
			return sum
		}
		esum = func(oi ObjectInfo) int64 {
			sum := int64(0)
			for _, i := range oi.Parts {
				sum += i.Size
			}
			return sum
		}
	)

	s1 := []int64{5487701, 5487799, 3}
	s2 := repeat(5487701, 5)