HHappy回复import collections v=int(input()) l=list(map(int,input().split())) d=collections.defaultdict(int) for k,v in enumerate(l): if v!=-1: d[v]+=k req=max(d.values()) for k,v in d.items(): if v==req: print(k) breakMaximum weight Node, #python #Juspay 1.1K · 06:38