Combinatorics

Badge Level 1 × 1978

Solve 5 problems on Combinatorics topic.

# User Unlock date Country XP
1978 Doug Swisher Aug. 18, 2017, 2:40 a.m. 21
1977 cooknas Aug. 15, 2017, 8:16 a.m. 22
1976 Manik Sharma Aug. 11, 2017, 7:17 p.m. 32
1975 conorclerkinoliver Aug. 11, 2017, 10:54 a.m.   33
1974 raksha28 Aug. 11, 2017, 6:43 a.m.   24
1973 A Choe Aug. 10, 2017, 3:27 p.m. 33
1972 dunja_petrovic Aug. 10, 2017, 9:09 a.m. 26
1971 moon.starsky377 Aug. 10, 2017, 5:23 a.m.   19
1970 Alessandro12036 Aug. 9, 2017, 10:10 p.m.   27
1969 hwinters Aug. 9, 2017, 3:33 p.m.   22
1968 ilightning Aug. 9, 2017, 2:34 p.m.   19
1967 Matthew Pearson Aug. 9, 2017, 11:08 a.m. 31
1966 Nguyen Anh Khoa Aug. 8, 2017, 7:45 a.m. 39
1965 quzp Aug. 8, 2017, 6:25 a.m.   24
1964 Dinelli_476167 Aug. 7, 2017, 9:29 p.m.   32
1963 ricky Aug. 7, 2017, 2:30 p.m.   20
1962 cbohn Aug. 6, 2017, 7:02 p.m.   34
1961 atav1st Aug. 6, 2017, 12:48 p.m.   28
1960 Hyeonah Lee Aug. 4, 2017, 3:32 a.m.   29
1959 JamesBoudouris Aug. 3, 2017, 7:27 p.m.   32
1958 pizzaboy911 Aug. 3, 2017, 1:52 a.m.   29
1957 zsteier Aug. 3, 2017, 12:13 a.m.   20
1956 Konstantin78 Aug. 2, 2017, 11:19 p.m.   30
1955 hkhaled Aug. 1, 2017, 11:18 p.m.   39
1954 mpauper Aug. 1, 2017, 10:14 a.m.   25
1953 Quang-Thang, Tran July 31, 2017, 2:41 p.m. 45
1952 liam.paul July 31, 2017, 12:49 p.m.   29
1951 NgocLe-Nguyen July 30, 2017, 3:30 a.m.   33
1950 nsarsour July 28, 2017, 3 p.m.   20
1949 Alicia_VC July 27, 2017, 10:30 a.m. 36
1948 Stepan Pachganov July 26, 2017, 7:06 a.m. 49
1947 Agnieszka Rumińska July 25, 2017, 10:04 a.m. 29
1946 scottpearson1224 July 24, 2017, 11:28 p.m.   28
1945 Valery Anor July 24, 2017, 12:47 p.m. 23
1944 peterchristofferholm July 23, 2017, 6:34 p.m. 27
1943 Thijs July 23, 2017, 10:17 a.m.   23
1942 Gsquzared July 21, 2017, 1:25 p.m.   33
1941 onk2onk July 20, 2017, 7:58 p.m. 30
1940 jmb503 July 19, 2017, 1:19 p.m.   33
1939 Wannisa Ritmahan July 18, 2017, 3 p.m. 35
1938 sib0 July 17, 2017, 7:47 p.m.   25
1937 leanna July 16, 2017, 7:18 p.m.   25
1936 tanweicher July 16, 2017, 8:09 a.m.   29
1935 koun July 12, 2017, 7:54 p.m. 61
1934 Valeriiya July 10, 2017, 3:17 p.m.   36
1933 dandanli0365 July 10, 2017, 1:47 a.m.   30
1932 Flavien Foussat July 9, 2017, 12:02 p.m. 36
1931 alexnikleo July 8, 2017, 5:01 a.m.   30
1930 Ann Caplin July 8, 2017, 1:07 a.m. 32
1929 Jong Hwan Yoon July 7, 2017, 1:11 p.m. 48
1928 Tanzira Najnin July 5, 2017, 3:57 p.m. 91
1927 Ólavur Mortensen July 5, 2017, 1:30 p.m. 20
1926 charpy July 4, 2017, 2:15 p.m. 124
1925 radamthompson June 30, 2017, 5:44 p.m.   28
1924 jonathan_chapel June 30, 2017, 1:06 p.m. 19
1923 richard90stewart June 29, 2017, 4:29 p.m. 27
1922 dnj01208 June 28, 2017, 5:11 p.m.   26
1921 Timofey Skvortsov June 28, 2017, 3:42 p.m. 37
1920 jfw June 28, 2017, 2:45 p.m.   27
1919 Changhan June 28, 2017, 6:31 a.m. 67
1918 KiwiP June 27, 2017, 7:06 a.m.   38
1917 schoelzj June 26, 2017, 8:59 p.m.   23
1916 Jane June 26, 2017, 4:53 p.m. 23
1915 Trương Minh Thanh Bửu June 24, 2017, 6:45 p.m. 27
1914 Francesco Ferrari June 24, 2017, 3:34 p.m. 45
1913 dev0112 June 23, 2017, 2:18 p.m. 29
1912 Кузиванов Николай Сергеевич June 22, 2017, 2:52 a.m. 30
1911 chabbi June 21, 2017, 7:39 p.m.   28
1910 quocviet0908 June 21, 2017, 5:32 p.m.   27
1909 namit316 June 21, 2017, 4:08 p.m. 36
1908 zhangtong516 June 20, 2017, 10:39 a.m. 25
1907 Orson MM June 20, 2017, 1:20 a.m. 23
1906 JNT June 18, 2017, 3:28 p.m. 28
1905 Yubi June 17, 2017, 3:25 p.m.   18
1904 bjameshunter June 17, 2017, 3:18 p.m.   24
1903 Matera_477430 June 17, 2017, 2:16 p.m.   17
1902 Nemanja Vucic June 17, 2017, 2:06 p.m. 21
1901 Ali Ezzat Helmy Ezzat June 17, 2017, 10:59 a.m. 26
1900 tsur June 14, 2017, 11:39 a.m.   30
1899 sti_zna June 13, 2017, 5:41 p.m.   30
1898 ftt June 12, 2017, 9:46 p.m.   21
1897 ludo09 June 12, 2017, 1:50 p.m.   23
1896 egeulgen June 12, 2017, 8:54 a.m.   37
1895 datakid June 7, 2017, 3:54 a.m. 24
1894 wlokhorst June 6, 2017, 8:38 p.m. 27
1893 Eugen Wybitul June 3, 2017, 4:27 a.m. 19
1892 samy441 June 3, 2017, 2:38 a.m.   37
1891 bob June 3, 2017, 12:52 a.m.   23
1890 bzorn June 2, 2017, 8:43 p.m. 32
1889 oystewh June 1, 2017, 12:52 p.m.   27
1888 Mertain May 31, 2017, 9:19 p.m.   43
1887 Vasilisa May 31, 2017, 8:50 p.m.   36
1886 kamilla.1201 May 31, 2017, 5:31 a.m.   30
1885 tim_smd May 30, 2017, 6:55 p.m.   30
1884 lade May 29, 2017, 9:27 p.m.   26
1883 Дыйканов Данияр May 29, 2017, 11:33 a.m. 41
1882 Jon Kiparsky May 29, 2017, 6:53 a.m. 51
1881 Bruno Lisak May 29, 2017, 3:38 a.m. 21
1880 SatchmoSpeaks May 23, 2017, 4:55 p.m.   32
1879 Oxana May 23, 2017, 11:33 a.m.   30
1878 bayah May 23, 2017, 11:06 a.m.   30
1877 edubkova99 May 22, 2017, 1:03 p.m.   30
1876 andrew.t.sterrett May 20, 2017, 11:33 p.m.   22
1875 biodatafarm May 17, 2017, 8:17 p.m.   31
1874 Ganugapati Sai Alekhya May 15, 2017, 9:52 a.m. 29
1873 gregadoff May 14, 2017, 4:59 a.m.   22
1872 keerthi May 11, 2017, 7:54 a.m.   31
1871 m.j.lbach May 9, 2017, 10:14 p.m.   37
1870 sammak May 5, 2017, 10:16 a.m. 85
1869 jonvnguyen May 4, 2017, 11:49 p.m.   25
1868 hhabra1 May 4, 2017, 4:26 a.m.   22
1867 wdafuc May 3, 2017, 2:11 p.m.   23
1866 Techin Supapol May 2, 2017, 8:07 a.m. 25
1865 Ju-Yeol Jung May 1, 2017, 1:15 p.m. 66
1864 lhcywww May 1, 2017, 4:18 a.m. 22
1863 Sumomo April 30, 2017, 5:05 p.m.   30
1862 dk1287 April 30, 2017, 4:40 p.m.   28
1861 Akagre April 30, 2017, 7:30 a.m.   30
1860 Herman Boonstra April 29, 2017, 9:56 p.m. 46
1859 Vladimir_Sukhov April 27, 2017, 9:23 p.m.   35
1858 José Gabriel Niño Barreat April 25, 2017, 2:50 p.m. 47
1857 Romain Feron April 24, 2017, 3:32 p.m. 23
1856 polentozer April 23, 2017, 5:15 p.m.   30
1855 Nunkyl April 20, 2017, 3:27 p.m. 30
1854 bbudge April 20, 2017, 12:33 a.m.   39
1853 GoodGenes April 19, 2017, 3:54 p.m.   25
1852 Mark P Harmon April 19, 2017, 2:21 a.m. 18
1851 olintsmith April 17, 2017, 10:02 p.m.   23
1850 Malthe April 17, 2017, 11:43 a.m. 31
1849 KDees2 April 16, 2017, 5:25 a.m.   26
1848 mperkett April 14, 2017, 8:46 p.m.   32
1847 mrmille6 April 14, 2017, 2:20 p.m.   31
1846 rosty.hustik April 14, 2017, 12:42 p.m.   30
1845 brenger April 14, 2017, 12:04 p.m.   30
1844 rgurden April 14, 2017, 10:07 a.m. 33
1843 AlenaT April 13, 2017, 7:57 p.m. 32
1842 ErwinRaySparks April 13, 2017, 6:43 p.m.   53
1841 Ilja Pavlov April 8, 2017, 9:10 p.m. 30
1840 Luke Thistlethwaite April 8, 2017, 7:30 p.m. 24
1839 xaph April 8, 2017, 5:53 p.m.   36
1838 Coaxecva April 8, 2017, 6:37 a.m. 29
1837 Ehsan Yakhshi-Tafti April 6, 2017, 5:03 a.m. 29
1836 brianlee99 April 6, 2017, 4:08 a.m.   27
1835 JacobU April 5, 2017, 11:14 p.m.   22
1834 fie11 April 5, 2017, 9:43 p.m.   20
1833 newuser1234 April 4, 2017, 1:39 a.m.   29
1832 Enes Çankırı April 1, 2017, 12:53 p.m. 21
1831 Kristina_Krv March 30, 2017, 9:21 a.m.   33
1830 Tholtus March 29, 2017, 11:26 p.m.   47
1829 IgorKozlovskii March 29, 2017, 2:56 p.m. 30

Combinatorics

The mathematics of counting objects.

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