add new solutions

solutions/3/q334/solution.go

@@ -0,0 +1,24 @@
+package q334
+
+import "math"
+
+func increasingTriplet(nums []int) bool {
+	if len(nums) < 3 {
+		return false
+	}
+
+	first, second := math.MaxInt, math.MaxInt
+
+	for _, x := range nums {
+		if x <= first {
+			first = x
+		} else if x <= second {
+			second = x
+		} else {
+			return true
+		}
+	}
+	return false
+}
+
+var _ = increasingTriplet