题解 | MP3光标位置

n = int(input())
op = input()
cur, screen = 0, 0#当前在窗口中的光标，窗口开始下标
for o in op:
    if o=='U':#往上
        cur = (cur-1)%n
        if cur==n-1:#跳转
            screen = n-4
        elif cur<screen:
            screen = cur
    elif o=='D':#往下
        cur = (cur+1)%n
        if cur==0:#跳转
            screen = 0
        elif cur>screen+3:
            screen = cur-3
res = list(range(screen+1,screen+5) if n>4 else range(1,n+1))#窗口
print(*res)
print(cur+1)