AC君的PYTHON代码

n=int(input())
vis=[-1 for i in range(510000)]
t_=list(map(int,input().split()))
it=1
for i in range(1,n+1):
    vis[t_[i-1]]=i
    if it==t_[i-1]:
        print(it,end='')
        it+=1
        while vis[it]!=-1 and it<=n:
            print(',',end='')
            print(it,end='')
            it+=1
        print()