| ANARC09C | number theory easy |
| CPRIME | number theory |
| DIV2 | number theory |
| DIV | number theory |
| DIVSUM | number theory precomputation |
| ETF | number theory |
| FACT0 | number theory sieve |
| FINDPRM | number theory sieve dp binary search adhoc |
| FNRANK | number theory inclusion exclusion |
| FRQPRIME | number theory binary search math |
| GCDEX | number theory |
| HS08PAUL | number theory easy |
| INCPOWK | number theory adhoc easy |
| LCMSUM | number theory |
| MB1 | adhoc number theory |
| MCIRGAME | big int dp catalan numbers google it |
| MSKYCODE | squarefree numbers inclusion-exclusion |
| NDIVPHI | math number theory |
| NGM2 | number theory inclusion exclusion |
| ODDDIV | number theory precomputation fast IO |
| PHONY | number theory |
| PRIME1 | number theory |
| SQFREE | number theory sieve hard inclusion exclusion |
| TUTMRBL | easy number theory |
| UCI2009B | number theory easy |
| MATGAME | Grundy numbers |
| KFSTB | dfs, finding number of paths |