InterviewBit Problems   Min Sum Path in Triangle : Solved

About the Min Sum Path in Triangle : Solved category (1)
Simplest C++ Solution with Bonus Points (1)
Easy solution Without using extra space (1)
Memoization approach (1)
O(1)space solution using inspace traversal and using the array itself as dp storage (1)
Lang: C++; Complexity[Time, Space]: [O(m*n), O(n)] (1)
C++ DP no extra space bottom up easy (1)
O(n) solution using list (1)
Dp C++ solution with O(n) extra space complexity (Bonus point) (1)
Very simple constant space C++ solution (1)
Does my solution count as O(n) space or no extra space or O(n^2) space (2)
Simple solution using constant extra space (1)
Shortest solution using top down approach (3)
O(n) space and O(n^2) time solution in C++ (1)
Top down approach with linear time and constant extra space (2)
Best Python Solution (1)
Pure recursive solution with dict based caching (2)