You are given an array that contains **marks** of  ```N``` students in a class. Now the each student ```i``` has the choice to give exam in a group of atmost ```K``` continous students. In that group each student scores the same marks as the **topper** of the group. Find the total **maximum score** of all the students that can be acheived.\n\nInput -\n```\nN = 5\nMARKS = 8 2 7 6 1\nK = 2\n```\nOutput -\n```\n35\n```\nExplanation -\n```\nThe students can form groups of size atmost 2 in the following way\n8, 8, 7, 6, 6 which maximises our answer as 8 and 2 form a group and 6 and 1 form a group and 7 alone forms another group.\n```\nInitially I thought of DP but wasen\'t able to come up with a solution. Any help with explanation will be appreciated...

You are given an array that contains marks of  N students in a class. Now the each student i has the choice to give exam in a group of atmost K continous studen