grep+ found these files to match your search:
p10511.cpp:
p753.cpp:
p11506.cpp:
p563.cpp:
p11752.cpp:
p10806.cpp:
p10480.cpp:
p11594.cpp:
p10594.cpp:
p369.cpp:
p10845.cpp:
p10746.cpp:
p11082.cpp:
p10330.cpp:
p820.cpp:
p10779.cpp:
p544.cpp:
p10092.cpp:
p10080.cpp:
p10735.cpp:
p11603.cpp:
grep+ searches the database of Valladolid problems that I solved (or tried to). You can give it keywords like "dp", "graphs", "math", "brute force", etc. and it will give you a list of problem numbers that (in my opinion) match the keywords. The database contains 1408 problems.
Please ignore anything that appears after "UNSOLVED:". As you probably know, not being able to solve a problem after many attempts can be very frustrating.