in python

You are given a maze with N cells. Each cell may have multiple entry points but not more than one exit (ie. entry/exit points are unidirectional doors like valves). The cells are named with an integer value from 0 to N1. Function Description: The sum of the largest sum cycle in the maze. Return - 1 if there are no cycles. Sum of a cycle is the sum of node number of all nodes in that cycle. INPUT FORMAT 1. An integer T, denoting the number of testcases, followed by 2T lines, as each testcase will contain 2 lines. 2. The first line of each testcase has the number of cells N. 3. The second line of each testcase has a list of N values of the edge[] array. edge[i] contains the cell number that can be reached from cell 'i' in one step. edge[i] is 1 if the 'i'th cell doesn't have an exit. OUTPUT FORMAT For each testcase given, output a single line that denotes the sum of the largest sum cycle. Converging Maze: Largest Sum Cycle 1.0