add new solutions

solutions/17/q1784/solution.go

@@ -0,0 +1,25 @@
+// Package q1784 implements a solution for https://leetcode.com/problems/check-if-binary-string-has-at-most-one-segment-of-ones/
+package q1784
+
+func checkOnesSegment(s string) bool {
+	last := 0
+	segments := 0
+	for i := range len(s) {
+		switch s[i] {
+		case '0':
+			last = 0
+		case '1':
+			if last == 0 {
+				if segments > 0 {
+					return false
+				}
+				segments++
+			}
+			last = 1
+		}
+	}
+
+	return segments == 1
+}
+
+var _ = checkOnesSegment