tsanmmmm2000's Tech Blog

Question

You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping you from robbing each of them is that adjacent houses have security system connected and it will automatically contact the police if two adjacent houses were broken into on the same night.

Given a list of non-negative integers representing the amount of money of each house, determine the maximum amount of money you can rob tonight without alerting the police.

Thinking

此題也是參考討論區的解法，關鍵在於控制好「搶」與「不搶」兩種情況，就能用DP解掉

My C# Solution

public class Solution {
    public int Rob(int[] nums) {
        var includedPrevious = 0;
        var excludedPrevious = 0;
        foreach(int num in nums)
        {
            var temp = includedPrevious;
            includedPrevious = num + excludedPrevious;
            excludedPrevious = (temp > excludedPrevious) 
                ? temp 
                : excludedPrevious;
        }
        return (includedPrevious > excludedPrevious) 
            ? includedPrevious 
            : excludedPrevious;
    }
}