结束上页 下页结束例 3? 设 1
333231
232221
131211
aaa
aaa
aaa
求
53
53
1026
333231
232221
131211
aaa
aaa
aaa

解?
53
53
1026
333231
232221
131211
aaa
aaa
aaa

53
53
53
2
333231
232221
131211
aaa
aaa
aaa

解?
解?
53
53
1026
333231
232221
131211
aaa
aaa
aa

53
53
53
2
333231
232221
131211
aaa
aaa
aaa

5)3(2
333231
232221
131211
aaa
aaa
aaa

2?(?3)?5?1?30?