9
1001
P1234
B2027
U76533
T512682
CF10A
AT_abc114_d
SP11470
UVA13277

https://www.luogu.com.cn/problem/P1001
https://www.luogu.com.cn/problem/P1234
https://www.luogu.com.cn/problem/B2027
https://www.luogu.com.cn/problem/U76533
https://www.luogu.com.cn/problem/T512682
https://www.luogu.com.cn/problem/CF10A
https://www.luogu.com.cn/problem/AT_abc114_d
https://www.luogu.com.cn/problem/SP11470
https://www.luogu.com.cn/problem/UVA13277