Question: Given a sequence of positive integers A and an integer T, return whether there is a continuous sequence of A that sums up to exactly T Example [23, 5, 4, 7, 2, 11], 20. Return True because 7 + 2 + 11 = 20 [1, 3, 5, 23, 2], 8. Return True because 3 + 5 = 8 [1, 3, 5, 23, 2], 7 Return False because no sequence in this array adds up to 7
Note: We are looking for an O(N) solution. There is an obvious O(N^2) solution which is a good starting point but is not the final solution we are looking for.