I am a solver of ACM problems. I have solved 38 problems. Now I'm trying the base conversion problems. Can anybody give me some problem numbers
of base conversion.
Plz give me some problems
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This is not a topic of Volume I. So you should submit this type of topics in Algorithm section.
...and if you want classified problems list, then go to: ShyGypsy / Igor’s Tools and use "Search query:" text box at topleft of the page.
This is a rich site for ACM solver. you can use other useful features of this page like: next2solve, problemStats, and diff  text box.
By searching with keyword "base" i found the problems below
...and if you want classified problems list, then go to: ShyGypsy / Igor’s Tools and use "Search query:" text box at topleft of the page.
This is a rich site for ACM solver. you can use other useful features of this page like: next2solve, problemStats, and diff  text box.
By searching with keyword "base" i found the problems below
grep+: UVA problems keyword search (v1.1)
grep+ found these files to match your search:
p11180.cpp: //easy, base conversion, complex numbers
p575.cpp: //easy, math, number theory, skew binary, base conversion, horner, short, good, excellent, tiny
p10677.cpp: //medium, math, number theory, horner's rule, base conversion, good, excellent
p636.cpp: //easy, good, short, math, number theory, horner, bases, squares, sqrt
p10019.cpp: //easy, trivial, math, horner, bases, bit counting, good
p10764.cpp: //medium, math, bases, signed digit number system, good, educational, gotcha
p10093.cpp: //easy, math, number theory, horner's rule, modular arithmetic, bases, divisibility, good
p173.cpp: //easy, parsing, graphs, simulation, bad, UNSOLVED: another fucked up graphbased simulation
p377.cpp: //easy, calculations in base 4, math
p10442.cpp: //medium, parsing, math, bases, horner, tricky
p10473.cpp: //easy, io, base conversion, scanf, trivial
p11121.cpp: //easy, trivial, math, base conversion

12 results match.
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 1227 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.
[ Common thing of every man is that, everyone thinks that he is uncommon ]