cf/mirror

Short Task

CF
1512G1700· expert2s512 MB⌨ stdin/stdout
#brute force#dp#math#number theory

Examples

Sample 1of 1
Input
12
1
2
3
4
5
6
7
8
9
10
39
691
Output
1
-1
2
3
-1
5
4
7
-1
-1
18
-1
1512G.cpp
loading editor…
Ln 11·137 BGNU C++20 (64)