Combinatorics

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Solve 5 problems on Combinatorics topic.

# User Unlock date Country XP
3270 zackpeacock July 2, 2021, 8:08 p.m.   30
3269 Krishnendu Sinha July 2, 2021, 6:50 p.m. 49
3268 GlebDi July 2, 2021, 4:57 p.m.   33
3267 Kosta June 30, 2021, 9:15 p.m. 28
3266 Guilherme Trevisan Linhares June 28, 2021, 7:41 p.m. 82
3265 j_xia June 25, 2021, 4:14 p.m.   24
3264 donny June 25, 2021, 10:25 a.m.   16
3263 etake June 25, 2021, 4:46 a.m.   30
3262 freezghost June 24, 2021, 11:41 a.m.   21
3261 Jamesb8 June 24, 2021, 4:14 a.m.   17
3260 rjb67 June 23, 2021, 2:25 p.m.   31
3259 ja3539 June 22, 2021, 7:55 p.m.   32
3258 Oleg Zakharov June 22, 2021, 8:24 a.m. 21
3257 alexisedozie June 21, 2021, 10:20 p.m.   34
3256 Josselin Tobelem June 21, 2021, 12:29 p.m. 19
3255 rosalinddd June 18, 2021, 5:17 a.m.   22
3254 Saulo Alves June 15, 2021, 9:15 p.m. 23
3253 Marmzy June 15, 2021, 2:26 p.m. 31
3252 hunter13fitzpatrick June 15, 2021, 1:24 p.m.   25
3251 Arif June 11, 2021, 7:33 a.m. 21
3250 Довгуша Александр June 10, 2021, 6:55 p.m. 35
3249 oliverdddd June 10, 2021, 6:34 p.m.   35
3248 Martin Eastwood June 9, 2021, 7:43 p.m. 29
3247 katia19 June 9, 2021, 11:04 a.m.   35
3246 metalcyanide June 7, 2021, 9:25 p.m.   17
3245 MichalRyszardWojcik June 7, 2021, 10:47 a.m. 44
3244 uselessbeaver June 6, 2021, 6:58 p.m.   26
3243 Kartikey1809 June 6, 2021, 4:56 p.m.   37
3242 Fariha Tasnim June 6, 2021, 4:18 p.m. 47
3241 MSethi June 5, 2021, 4:31 a.m. 27
3240 Natalia Gromova June 5, 2021, 1:28 a.m. 25
3239 Drew Beamer June 4, 2021, 7:41 p.m. 24
3238 Parsa.ghadermazi May 31, 2021, 3:42 a.m.   27
3237 bstacy98405 May 29, 2021, 7:51 p.m. 25
3236 Tomazz_2 May 29, 2021, 6:26 p.m.   27
3235 pastellie May 29, 2021, 4:35 a.m.   20
3234 JapaChin May 28, 2021, 9:59 p.m.   21
3233 danybany99 May 22, 2021, 3:08 p.m.   20
3232 HealerDe May 18, 2021, 2:25 p.m.   29
3231 Tuan.Nguyen May 18, 2021, 12:31 p.m. 37
3230 Jeroen van der Meer May 18, 2021, 10:39 a.m. 19
3229 wgreena1 May 17, 2021, 11:36 a.m.   31
3228 stephaaaaan May 16, 2021, 6:41 a.m.   19
3227 Rafael Yakupov May 14, 2021, 11:29 a.m. 25
3226 jamescaf3 May 14, 2021, 1:53 a.m.   34
3225 drk_dotson May 13, 2021, 5:25 a.m.   36
3224 Leslie May 11, 2021, 11:50 p.m. 26
3223 dert May 10, 2021, 11:21 a.m.   30
3222 amahaja5 May 8, 2021, 9:03 p.m.   29
3221 sooryasadayam May 7, 2021, 11:20 a.m.   25
3220 feridnassor May 5, 2021, 9:49 a.m.   26
3219 DaniAkemi May 4, 2021, 10:54 p.m.   23
3218 akunihiro May 4, 2021, 7:28 p.m.   30
3217 ivenw May 3, 2021, 2:38 p.m.   19
3216 Han Seungbeom May 2, 2021, 3:07 p.m. 33
3215 TheWeirdChemist May 2, 2021, 10:59 a.m.   33
3214 Mikko Muilu April 30, 2021, 9:38 a.m. 26
3213 puupaikka April 29, 2021, 9:28 p.m. 35
3212 Logan won April 27, 2021, 6:43 a.m. 32
3211 Jonathan Vollmert April 26, 2021, 4:19 p.m. 29
3210 Edward Apostol April 24, 2021, 1:41 p.m. 30
3209 lsmandy0310 April 24, 2021, 1:16 p.m.   23
3208 Wladimir Araujo Tavares April 23, 2021, 7:44 p.m. 26
3207 David Guo April 23, 2021, 6:29 a.m. 31
3206 Gayatri Iyer April 22, 2021, 7:56 p.m. 32
3205 Plamen April 22, 2021, 2:10 p.m.   20
3204 Thiago Bérgamo Cardoso April 21, 2021, 2:44 p.m. 79
3203 ob94 April 20, 2021, 10:33 p.m.   32
3202 pavel.voronin April 20, 2021, 4:26 p.m.   32
3201 lifecoder_07 April 18, 2021, 5:42 p.m.   28
3200 akhildsnakhilesh April 18, 2021, 12:20 p.m.   22
3199 fymak April 17, 2021, 10:08 p.m.   25
3198 Ringsi April 17, 2021, 8:42 p.m. 26
3197 mutatedribosome April 17, 2021, 2:13 p.m.   17
3196 t.mu3ll3r April 15, 2021, 9:02 p.m.   40
3195 omegatro April 14, 2021, 4:35 p.m. 54
3194 jpaul.ohare April 14, 2021, 12:36 a.m.   20
3193 elsku.magga April 13, 2021, 2:56 p.m. 31
3192 jeff_parker@harvard.edu April 12, 2021, 10:49 p.m.   62
3191 Nolan Shaffer April 12, 2021, 2:40 a.m. 39
3190 Rusiek April 11, 2021, 9:50 p.m. 19
3189 charlieBrown April 11, 2021, 7:46 a.m.   22
3188 zeroth April 5, 2021, 10:39 p.m. 50
3187 marioisbeck April 5, 2021, 3:58 p.m. 46
3186 draidgen April 3, 2021, 1:37 a.m.   26
3185 alexd6631 April 2, 2021, 5:05 p.m.   25
3184 Drazyll April 2, 2021, 11:19 a.m.   26
3183 unkosan April 2, 2021, 8:38 a.m.   24
3182 ob40 April 2, 2021, 12:13 a.m.   25
3181 risg99 April 1, 2021, 5 p.m.   44
3180 hesham March 31, 2021, 9:06 a.m.   28
3179 luckeymackey777 March 29, 2021, 1:37 a.m.   22
3178 jeetm March 27, 2021, 2 p.m.   18
3177 alirezatnr March 26, 2021, 6:35 p.m.   23
3176 Pirinac March 25, 2021, 1:55 p.m. 33
3175 ilyes0 March 24, 2021, 6:19 a.m. 29
3174 Milos March 21, 2021, 2:45 p.m. 20
3173 jamespadler March 20, 2021, 11:23 p.m.   39
3172 Sebastian_S March 20, 2021, 7:15 p.m. 27
3171 VeniaminV March 20, 2021, 7:54 a.m.   30
3170 zzddsgnsdl March 20, 2021, 7:24 a.m.   23
3169 Leucopsar March 19, 2021, 1:34 p.m. 43
3168 ZhangYi19991015 March 19, 2021, 11:48 a.m.   33
3167 danielaperry March 17, 2021, 8:26 p.m.   69
3166 DianaICD March 15, 2021, 10:51 p.m.   49
3165 Zach Obront March 13, 2021, 3:56 a.m. 40
3164 cs-ucb March 12, 2021, 10:23 p.m.   20
3163 yapox March 12, 2021, 9:16 p.m. 30
3162 Andy Kershaw March 11, 2021, 11:39 p.m. 29
3161 abondrn March 11, 2021, 11:03 p.m.   27
3160 rickyw1994 March 11, 2021, 10:50 p.m.   29
3159 Martin March 11, 2021, 7:12 p.m. 32
3158 Butilov Mattew March 10, 2021, 10:42 a.m. 15
3157 ivlekatya March 9, 2021, 9:35 p.m.   27
3156 smart_cookie March 9, 2021, 4:34 p.m.   15
3155 teodore02ru March 9, 2021, 2:24 p.m.   18
3154 ilyabeletsky March 8, 2021, 4:54 p.m.   15
3153 ZobkovaG March 8, 2021, 6:33 a.m. 16
3152 d3scmps March 7, 2021, 4:31 p.m.   31
3151 Elizaveta Artser March 6, 2021, 1:17 p.m. 24
3150 Maqar March 6, 2021, 7:31 a.m.   19
3149 J.Fry March 6, 2021, 2:53 a.m.   23
3148 Vikesh Ajith March 6, 2021, 2:14 a.m. 42
3147 Polina March 5, 2021, 10:12 p.m. 24
3146 Hamish McLean March 5, 2021, 2:27 p.m. 32
3145 osintseva.ed March 4, 2021, 2 p.m.   25
3144 agkuznetsov March 2, 2021, 8:50 p.m.   15
3143 ekrez March 1, 2021, 7:13 p.m.   18
3142 itallo.rodrigues March 1, 2021, 4:29 p.m.   21
3141 Viktor Panasyuk Feb. 28, 2021, 5:40 p.m. 27
3140 denis.rezni Feb. 28, 2021, 10:36 a.m.   20
3139 albynotar Feb. 27, 2021, 10:25 p.m. 28
3138 azqpeng Feb. 27, 2021, 3:50 a.m.   38
3137 trex7g2 Feb. 26, 2021, 5:36 p.m.   26
3136 Ethan Sim Feb. 25, 2021, 5:38 p.m. 23
3135 niveditaghule Feb. 25, 2021, 4:54 p.m.   38
3134 ruchprat Feb. 25, 2021, 3:12 p.m.   23
3133 Eugene Feb. 25, 2021, 10:39 a.m. 27
3132 juno Feb. 25, 2021, 6:53 a.m.   38
3131 rodfig Feb. 23, 2021, 10:10 p.m.   65
3130 kirk.hansen.227 Feb. 23, 2021, 4:45 a.m.   23
3129 KasincevD Feb. 22, 2021, 10:09 p.m.   29
3128 slotim Feb. 22, 2021, 11:08 a.m.   21
3127 alexcpan Feb. 22, 2021, 9:59 a.m.   49
3126 chenyul Feb. 21, 2021, 12:39 p.m.   22
3125 NewYorker2021 Feb. 21, 2021, 12:18 p.m. 21
3124 Noah Syrkis Feb. 20, 2021, 1:30 p.m. 32
3123 dcourtine Feb. 19, 2021, 5:38 p.m.   47
3122 ilan.braj Feb. 18, 2021, 8:02 p.m.   24
3121 Mathoux Feb. 16, 2021, 2:41 p.m.   37

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Combinatorics

The mathematics of counting objects.

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