Wednesday, February 3, 2016

Second Max of Array

Second Max of Array

Find the second max number in a given array.


Example
Given [1, 3, 2, 4], return 3.
Given [1, 2], return 1.
Note
You can assume the array contains at least two numbers.



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public class Solution {
    /**
     * @param nums: An integer array.
     * @return: The second max number in the array.
     */
    public int secondMax(int[] nums) {
        /* your code */
        int max = Math.max(nums[0], nums[1]);
        int secondMax = Math.min(nums[0], nums[1]);
        
        for (int i = 2; i < nums.length; i++) {
            if (nums[i] > max) {
                secondMax = max;
                max = nums[i];
            }
            else {
                if (nums[i] > secondMax) {
                    secondMax = nums[i];
                }
            }
        }
        
        return secondMax;
    }
}