20201226

20201226/main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"math"
+	"sort"
+)
+
+func main() {
+
+}
+
+func findThirdMax(nums []int) int {
+	if len(nums) == 0 {
+		return 0
+	}
+	sort.Sort(sort.Reverse(sort.IntSlice(nums)))
+	if len(nums) < 3 {
+		return nums[0]
+	}
+	v := nums[0]
+	count := 0
+	for _, n := range nums {
+		v = n
+		if count == 3 {
+			break
+		}
+		if v > n {
+			count++
+		}
+	}
+	return v
+}
+
+func findThirdMax2(nums []int) int {
+	vs := [3]int{math.MinInt64, math.MinInt64, math.MinInt64}
+	found := false
+	for _, n := range nums {
+		if n == vs[0] || n == vs[1] || n == vs[2] {
+			continue
+		}
+		if n > vs[0] {
+			vs[0], vs[1], vs[2] = n, vs[0], vs[1]
+		} else if n > vs[1] {
+			vs[1], vs[2] = n, vs[1]
+		} else if n > vs[2] {
+			found = true
+			vs[2] = n
+		}
+	}
+	if found {
+		return vs[2]
+	}
+	return vs[0]
+}