LeetCode 198. House Robber [Easy]

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LeetCode 198. House Robber.

题目来源：https://leetcode.com/problems/house-robber

题目难度：Easy

解答1[Java]：

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class Solution {
    public int rob(int[] nums) {
        if (nums.length == 0)
            return 0;
        int prev1 = 0;
        int prev2 = 0;
        for (int num : nums) {
            int tmp = prev1;
            prev1 = Math.max(prev2 + num, prev1);
            prev2 = tmp;
        }
        return prev1;
    }
}