Student have assigned a series of maths problems that have points associated with them given a sorted points are minimise the number of problems as student needs to be these criteria criteria one they must always follow the first problem index I is equal to $0$ criteria two after following the eye problem they choose to solve the next problem I plus one or skip hide and Saudi I $+2$ problem criteria three students must keep following problems until the difference between the maximum and minimum points questions so so far meets or exceeds a specified threshold if students cannot meet or exceeded the threshold they must follow all the problems written the minimum number of problems a student needs to Salu example points is equal to one, two, three, five, eight, threshold is equal to $4$