Number of segments in a string.

Author: recherst

Easy/434.Number of Segments in a String.playground/Contents.swift

@@ -0,0 +1,49 @@
+/**
+ Given a string s, return the number of segments in the string.
+
+ A segment is defined to be a contiguous sequence of non-space characters.
+
+  
+
+ Example 1:
+ Input: s = "Hello, my name is John"
+ Output: 5
+ Explanation: The five segments are ["Hello,", "my", "name", "is", "John"]
+ 
+ Example 2:
+ Input: s = "Hello"
+ Output: 1
+  
+
+ Constraints:
+ - 0 <= s.length <= 300
+ - s consists of lowercase and uppercase English letters, digits, or one of the following characters "!@#$%^&*()_+-=',.:".
+ - The only space character in s is ' '.
+ */
+class Solution {
+    func countSegments(_ s: String) -> Int {
+        guard !s.isEmpty else { return 0 }
+        var start = 0
+        var end = 0
+        var count = 0
+        for c in s {
+            if c != " " {
+                end += 1
+            } else {
+                if end > start {
+                    count += 1
+                    start = 0
+                    end = 0
+                }
+            }
+        }
+        if end > start {
+            count += 1
+        }
+        return count
+    }
+}
+
+let s = Solution()
+let r = s.countSegments("                     ")
+print(r)

Easy/434.Number of Segments in a String.playground/contents.xcplayground

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='ios' buildActiveScheme='true' importAppTypes='true'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

Easy/434.Number of Segments in a String.playground/playground.xcworkspace/contents.xcworkspacedata

@@ -87,6 +87,7 @@
 83. [Fizz Buzz](https://github.com/recherst/leetcode-algtorithm/blob/main/Easy/409.Fizz%20Buzz.playground/Contents.swift)
 84. [Third Maximum Number](https://github.com/recherst/leetcode-algtorithm/blob/main/Easy/414.Third%20Maximum%20Number.playground/Contents.swift)
 85. [Add Strings](https://github.com/recherst/leetcode-algtorithm/blob/main/Easy/415.Add%20Strings.playground/Contents.swift)
+86. [Number of Segments in a String](https://github.com/recherst/leetcode-algtorithm/blob/main/Easy/434.Number%20of%20Segments%20in%20a%20String.playground/Contents.swift)
 
 #### Medium