2020-03-13

Author: JiayangWu

0169.多数元素/0169-多数元素.py

@@ -4,5 +4,16 @@ def majorityElement(self, nums):
         :type nums: List[int]
         :rtype: int
         """
-        nums.sort()
-        return nums[len(nums) // 2]
+        vote = None
+        vote_cnt = 0
+        
+        for num in nums:
+            if not vote or num == vote:
+                vote = num
+                vote_cnt += 1
+            else:
+                vote_cnt -= 1
+                if vote_cnt == 0:
+                    vote = num
+                    vote_cnt = 1
+        return vote

0300.最长上升子序列/0300-最长上升子序列.py

@@ -4,22 +4,11 @@ def lengthOfLIS(self, nums):
         :type nums: List[int]
         :rtype: int
         """
-        l = len(nums)
-        if not l:
-            return 0
-        dp = [1 for _ in range(l)]
+        dp = [1 for _ in nums]
 
-        for index, item in enumerate(nums):
-            dp[index] = self.find(nums[:index + 1], dp) + 1
-        # print dp       
-        return max(dp)
-            
-    
-    def find(self, nums, dp):
-        max_element = -1 * 2 << 31
-        
-        for i in range(len(nums) - 2, -1, -1):
-            if nums[i] < nums[-1]:
-                max_element = max(max_element, dp[i]) 
-
-        return max_element if max_element != -1 * 2 << 31 else 0
+        for i in range(len(nums)):
+            for j in range(i):
+                if nums[i] > nums[j]:
+                    dp[i] = max(dp[i], dp[j] + 1)
+                    
+        return max(dp) if dp else 0