| 2251 | Secvmax | Cosmin Gheorghe | Algoritmiada 2009, Runda 3 | N/A |
| 2252 | Secvmin | Cosmin Silvestru Negruseri, Paul-Dan Baltescu | Algoritmiada 2012, Runda 2 | N/A |
| 2253 | Secvxor | Mihai Bunget | ONI 2023, Baraj Seniori, ziua 2 | N/A |
| 2254 | Secvzerounu | Tamio-Vesa Nakajima | Romanian Collegiate Programming Contest 2019 | N/A |
| 2255 | Sediu | Mugurel Ionut Andreica | .campion 2003 |      2/5 |
| 2256 | Segmente | Andrei Paul Puni, Mihai Ciucu | All You Can Code 2008 |      3/5 |
| 2257 | Segmente | Dan Pracsiu | ONI 2011 - clasa a 10-a | N/A |
| 2258 | Segmente2 | Vlad Duta | RMI 2014 | N/A |
| 2259 | Seif | Andrei Grigorean | Stelele Informaticii 2007-2008, Clasele 11-12 | N/A |
| 2260 | Semafoare | Paul-Dan Baltescu | Algoritmiada 2010, Runda 3 | N/A |
| 2261 | Semafor2 | Andrei Constantinescu | InfoPro, Runda 1, Grupa A | N/A |
| 2262 | Semne | Mihai Ciucu | info-arena 1.0 |      3/5 |
| 2263 | Semne3 | Eugenie Daniel Posdarascu | Algoritmiada 2014, Runda 2 |      1/5 |
| 2264 | Senat | Cristian Cadar | Lista lui Francu |      3/5 |
| 2265 | Senzori | Mugurel Ionut Andreica | Lot 2008 - Piatra Neamt, Baraj2 | N/A |
| 2266 | SequenceQuery | Cosmin Silvestru Negruseri | Bursele Agora 2006 |      4/5 |
| 2267 | Seqval | Tamio-Vesa Nakajima | Science On 2021, clasa 9 | N/A |
| 2268 | Seriale | Eugenie Daniel Posdarascu | Algoritmiada 2016 Runda 1 Seniori | N/A |
| 2269 | Serviciu | Andrei Grigorean | Infoarena Monthly 2012, Runda 9 | N/A |
| 2270 | SETI | Mihai Patrascu | ONI 2002 |      3/5 |
| 2271 | Sets | Adrian Budau, Mihai Calancea | ONIS 2015, Runda Finala | N/A |
| 2272 | Sever | Piscu Stefan, Verde Cristian | Baraj Shumen Seniori ICHB-Vianu - 2022 | N/A |
| 2273 | Sezon | Andrei Constantinescu | OSEPI Baraj Seniori 1 | N/A |
| 2274 | Sg1 | Rodica Pintea | ONI 2006, clasa 10 | N/A |
| 2275 | Shgraf | Andrei Grigorean | Lot Iasi 2008, Baraj 4 | N/A |
| 2276 | Shield: Underworld Ruler | Baltatu Andrei | FMI No Stress 2017 | N/A |
| 2277 | Shift | Andrei Grigorean | Infoarena Monthly 2012, Runda 3 | N/A |
| 2278 | ShiftRight | Lucian Bicsi | FMI No Stress 8 | N/A |
| 2279 | Shiroeseq | Tamio-Vesa Nakajima | AGM 2019, runda nationala | N/A |
| 2280 | Shop | Mircea Bogdan Pasoi | preONI 2007, Runda 4 |      1/5 |
| 2281 | Shopping | Alexa Tudose | Junior Challenge 2020 | N/A |
| 2282 | Shoturi | Tinca Matei | Autumn WarmUp 2019 | N/A |
| 2283 | Showroom | Doru Popescu Anastasiu | ONI 2013, clasa a 10-a | N/A |
| 2284 | Shuffle | Tiberiu Savin | Infoarena Monthly 2012, Runda 7 | N/A |
| 2285 | Shuffle2 | Mihai Calancea | ONI 2016, Baraj | N/A |
| 2286 | Shukarime | Teodor Ionescu | Concursul National de Informatica "Adolescent Grigore Moisil" 16 |      3/5 |
| 2287 | Sieve2 | Giorgio Audrito | IIOT 2021-22 Runda 3 | N/A |
| 2288 | Siguranta Nationala | Bogdan Alexandru Stoica | Winter Challenge 2008, Runda 2 | N/A |
| 2289 | Silvania | Adrian Budau, Eugenie Daniel Posdarascu | Algoritmiada 2019 Runda Finala | N/A |
| 2290 | Simetric | Filip Cristian Buruiana | ONI 2010, clasa a 9-a | N/A |
| 2291 | Simetrii | Cosmin Gheorghe | Selectie Girls Programming Camp | N/A |
| 2292 | Similar | Stefan Ciobaca | ONIS 2014, Runda Finala | N/A |
| 2293 | Simpla | Din Folclor | Summer Challenge 2009, Runda 2 | N/A |
| 2294 | Simulare | Chichirim George | Concursul National de Informatica "Adolescent Grigore Moisil" 17 | N/A |
| 2295 | Single Instruction Multiple Data | Alexandru Petrescu | ad-hoc | N/A |
| 2296 | Sipet | Budai Istvan | ONI 2015, clasa a 9-a | N/A |
| 2297 | Sir | Alexandru Dimitriu | info-arena 1.0 |      3/5 |
| 2298 | Sir 2 | Alexandru Mosoi | Lot 2006 Ploiesti | N/A |
| 2299 | Şir de perechi | Bogdan Iordache, Denis-Gabriel Mita | InfoOltenia 2018 - Clasele 9 - 10 Echipe | N/A |
| 2300 | Sir3 | Mircea Dima | Lot Bistrita 2009, Baraj 1 | N/A |