adj_list=[[1,2],[2,3],[4],[4],[]]
inv_adj_list=[[],[0],[0,1],[1],[2,3]]
start=0
a=[start]
ts=[]
v = [0 for i in range(len(adj_list))]

def traverse(node,v,inv):
    for adj in inv[node]:
        if(v[adj]==0):
            traverse(adj,v,inv)
    v[node]=1
    ts.append(node)


for i in range(len(adj_list)):
    if(v[i]==0):
        traverse(i,v,inv_adj_list)


print(ts)