I was doing https://codeforces.com/contest/1420/problem/C1 which is a max sum alternating subsequence problem. I understand the dp solution but I fail to understand why adding the first number in the array then adding every positive arr[i] — arr[i-1] works if you have to choose ...
The maximum sum is 26 The time complexity of the above solution is O(n) and doesn’t require any extra space. Also See: Maximum Sum Increasing Subsequence Problem Longest Decreasing Subsequence Problem Longest Alternating Subsequence Problem – II Rate this post Average rating 4.65/5. Vote co...
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intfindMaxSumSubsequence(vector<int>const&nums,inti,intn,intprev) { // base case: all elements are processed if(i==n){ return0; } // recur by excluding the current element intexcl=findMaxSumSubsequence(nums,i+1,n,prev); intincl=0; ...
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