169. Majority Element
1. 问题描述
Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times.
You may assume that the array is non-empty and the majority element always exist in the array.
Tags: Array Divide and Conquer Bit Manipulation
Similar Problems: (M) Majority Element II
2. 解题思路
- 详见《剑指offer》
3. 代码
1 class Solution { 2 public: 3 int majorityElement(vector<int>& nums) 4 { 5 int lastNum = nums[0]; 6 int count = 0; 7 for (int i=0; i<nums.size(); i++) 8 { 9 if (lastNum == nums[i]) 10 { 11 count++; 12 } 13 else 14 { 15 count--; 16 if (0 == count) 17 { 18 lastNum = nums[i]; 19 count++; 20 } 21 } 22 } 23 return lastNum; 24 } 25 };