update

medium/228.summary-ranges.go

@@ -0,0 +1,17 @@
+import (
+	"fmt"
+)
+
+func summaryRanges(nums []int) (ranges []string) {
+	for beg, end := 0, 0; beg < len(nums); beg = end {
+		for end = beg + 1; end < len(nums) && nums[end]-nums[end-1] == 1; end++ {
+		}
+		if beg+1 == end {
+			ranges = append(ranges, fmt.Sprintf("%d", nums[beg]))
+		} else {
+			ranges = append(ranges, fmt.Sprintf("%d->%d", nums[beg], nums[end-1]))
+		}
+	}
+	return
+}
+