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198.cpp

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class Solution {
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public:
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int rob(vector<int>& nums) {
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int n=nums.size();
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if(n==0)
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{
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return 0;
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}
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else if(n==1){
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return nums[0];
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}
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else if(n==2){
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return max(nums[1],nums[0]);
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}
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else if(n==3){
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return max( (nums[0]+nums[2]) , nums[1]);
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}
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else
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{
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int A[n+1];
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A[0]=0;
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A[1]=nums[0];
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A[2]=max(nums[1],nums[0]);
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A[3]=max( (nums[0]+nums[2]) , nums[1]);
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A[4]=max( max ( (nums[3]+nums[0]),(nums[1]+nums[3]) ), (nums[0]+nums[2]) );
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for(int i=5;i<=n;i++){
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A[i]= max ( A[i-1] , max ( (A[i-3] + nums[i-1] ) , ( A[i-2] + nums[i-1] ) ) );
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}
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return A[n];
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}
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}
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};

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