这个是哪里错了呢，return outside function

n = int(input())
s = list(map(int,input().split()))
d = {}
for c in s:
    d[c] = d.get(c,0) + 1
    if d[c] > (len(s) / 2):
        print(c)
        break
else:
    print("no")

return 改成print(c) break , 然后就是如果不存在用else来输出,或者你封装成函数,才会用到return