Solve 20 problems on Combinatorics topic.
# | User | Unlock date | Country | XP |
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177 | XJW | Jan. 9, 2021, 2:50 p.m. |
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87 |
176 | Heonjong Han | Dec. 30, 2020, 11:57 a.m. |
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91 |
175 | Manas Mahale | Dec. 27, 2020, 6:16 a.m. |
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192 |
174 | @ZevCheng | Dec. 22, 2020, 9:54 a.m. |
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126 |
173 | blowkj | Nov. 25, 2020, 4 p.m. |
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108 |
172 | Simon Crase | Nov. 23, 2020, 3:40 a.m. |
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256 |
171 | Chuhao Li | Oct. 28, 2020, 1:58 a.m. |
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164 |
170 | Niihashi | Oct. 14, 2020, 10:05 a.m. |
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92 |
169 | CAI | Sept. 4, 2020, 4:13 a.m. |
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105 |
168 | dnciric | July 31, 2020, 11:27 a.m. | 122 | |
167 | Yang Zhang | July 3, 2020, 7:31 a.m. |
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246 |
166 | Raul O. Osorio Candelario | June 23, 2020, 9:08 p.m. |
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121 |
165 | KappaPapa | June 18, 2020, 4:18 p.m. |
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85 |
164 | akqe | April 29, 2020, 3:20 a.m. |
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81 |
163 | Ege Ulgen | April 24, 2020, 12:02 p.m. |
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283 |
162 | Kit Burschka | April 23, 2020, 11:14 p.m. |
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154 |
161 | mrueda | April 7, 2020, 9:26 a.m. |
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287 |
160 | arada24 | March 18, 2020, 8:57 a.m. | 143 | |
159 | novulo | Dec. 20, 2019, 3:23 p.m. | 62 | |
158 | zzxzzx | Dec. 16, 2019, 1:19 p.m. | 90 | |
157 | yds88228 | Sept. 17, 2019, 8:02 p.m. | 110 | |
156 | Oren Milman | Sept. 16, 2019, 12:33 p.m. |
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285 |
155 | mchap3 | Sept. 13, 2019, 3:46 p.m. | 111 | |
154 | death | July 26, 2019, 12:34 a.m. |
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105 |
153 | Leo Mazaev | July 19, 2019, 8:43 p.m. |
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285 |
152 | IgorKozlovskii | May 20, 2019, 9:31 p.m. |
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94 |
151 | DW Daniel Kim | April 16, 2019, 7:51 a.m. |
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285 |
150 | Kuang Chuan Lo | March 19, 2019, 11:45 a.m. |
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88 |
149 | András Szilágyi | Feb. 15, 2019, 6:20 p.m. |
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223 |
148 | Ivan Appel | Nov. 6, 2018, 9:23 p.m. |
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87 |
147 | Shumin Li | Nov. 3, 2018, 7:30 a.m. |
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108 |
146 | 匡盟盟 | Nov. 1, 2018, 7:16 a.m. |
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109 |
145 | Jasper Hu | Oct. 24, 2018, 4:56 a.m. |
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281 |
144 | LiQiuhui | Sept. 29, 2018, 5:35 p.m. | 110 | |
143 | cxrjj | Sept. 20, 2018, 10:02 a.m. |
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153 |
142 | gautrang | Sept. 10, 2018, 6:22 a.m. |
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285 |
141 | Arnaud Liehrmann | Aug. 9, 2018, 7:14 p.m. |
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196 |
140 | Frederick | June 22, 2018, 7:15 p.m. |
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160 |
139 | zhengt | June 11, 2018, 9:21 a.m. |
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80 |
138 | gilgamec | May 15, 2018, 1:39 p.m. |
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160 |
137 | Haibao Tang | April 29, 2018, 9:39 p.m. |
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285 |
136 | dscsamson | April 4, 2018, 12:08 p.m. |
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91 |
135 | malipivo | March 22, 2018, 12:30 p.m. |
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192 |
134 | Emiliamw | Feb. 6, 2018, 3:02 a.m. | 98 | |
133 | ZhenHu | Feb. 3, 2018, 12:38 a.m. | 207 | |
132 | Ann Caplin | Jan. 31, 2018, 1:39 a.m. |
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153 |
131 | Jonathan Dursi | Jan. 6, 2018, 4:14 a.m. |
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102 |
130 | Tamas Kurics | Sept. 30, 2017, 1:53 p.m. |
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280 |
129 | winterriver | Sept. 9, 2017, 8:54 p.m. | 109 | |
128 | NiakTheWizard | Aug. 27, 2017, 5:23 p.m. |
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161 |
127 | Elmar Hinz | Aug. 4, 2017, 10:38 a.m. |
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309 |
126 | Matt Person | July 7, 2017, 8:05 a.m. |
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92 |
125 | Huaiyu Sun | May 16, 2017, 6:57 p.m. |
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287 |
124 | bspitzerR | March 15, 2017, 4:47 a.m. | 97 | |
123 | Dohoon Lee | March 9, 2017, 11:27 a.m. |
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268 |
122 | skafdasschaf | Jan. 24, 2017, 1:21 p.m. |
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148 |
121 | Adam Knapp | Jan. 6, 2017, 5:29 p.m. |
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96 |
120 | Byoungnam Min | Jan. 6, 2017, 1:44 a.m. |
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274 |
119 | cescgina | Jan. 2, 2017, 6:34 p.m. |
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285 |
118 | SaraS | Dec. 12, 2016, 9:30 a.m. | 77 | |
117 | dcyoo | Dec. 2, 2016, 4:57 a.m. | 108 | |
116 | Strahil Ivanov Pastuhov | Aug. 26, 2016, 8:18 a.m. |
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258 |
115 | Evgeny Polevikov | Aug. 12, 2016, 4 p.m. |
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158 |
114 | Błażej Kramarski | Aug. 8, 2016, 12:11 a.m. |
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139 |
113 | lding | July 15, 2016, 1:24 a.m. | 139 | |
112 | bspitzer | July 4, 2016, 6:16 p.m. | 108 | |
111 | ray_chenrf | June 19, 2016, 10:57 a.m. |
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146 |
110 | Oguz Hidir | May 27, 2016, 1:08 a.m. |
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285 |
109 | yx749 | May 22, 2016, 10:45 a.m. |
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319 |
108 | Ming Jie Wong | May 18, 2016, 1:22 p.m. |
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141 |
107 | holomorph__ | May 13, 2016, 7:30 p.m. |
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74 |
106 | Hélio Wang | April 22, 2016, 2:07 p.m. |
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245 |
105 | Dmitry Ischenko | March 16, 2016, 6:23 p.m. |
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106 |
104 | Saddam Hossain | Feb. 24, 2016, 6:26 p.m. |
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189 |
103 | Naveen kumar Meena | Feb. 20, 2016, 8:16 p.m. |
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214 |
102 | Tomáš Hromada | Feb. 2, 2016, 9:45 p.m. |
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111 |
101 | alexpm100 | Jan. 20, 2016, 1:11 a.m. | 194 | |
100 | xiaodili | Jan. 12, 2016, 11:58 p.m. |
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319 |
99 | simra73 | Jan. 9, 2016, 7:05 a.m. | 99 | |
98 | kapoozy | Nov. 27, 2015, 8:39 p.m. |
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114 |
97 | Peter Groenhout | Oct. 27, 2015, 5:45 a.m. |
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100 |
96 | IIMOG | Oct. 2, 2015, 11:04 a.m. |
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319 |
95 | Anngaocui | Sept. 29, 2015, 2:34 a.m. | 97 | |
94 | Jesper Blynel | Sept. 26, 2015, 11:47 p.m. |
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86 |
93 | nathankitchen | Sept. 23, 2015, 10:11 p.m. | 86 | |
92 | gustav | Sept. 13, 2015, 2:12 p.m. |
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85 |
91 | Alexey Dobronadezhdin | Sept. 4, 2015, 9:06 p.m. |
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313 |
90 | Filip Hrenić | Aug. 17, 2015, 5:46 a.m. |
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126 |
89 | Fan Zhang | Aug. 14, 2015, 8:31 a.m. |
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207 |
88 | Enes Poyraz | July 31, 2015, 12:11 a.m. |
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237 |
87 | LisperWhisper | July 28, 2015, 11:51 a.m. |
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165 |
86 | Edgar Martínez Encarnación | July 25, 2015, 5:53 p.m. |
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290 |
85 | Alexander Pfundner | July 2, 2015, 1:06 p.m. |
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117 |
84 | Eugene Baulin | June 29, 2015, 6:09 p.m. |
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198 |
83 | Quan Wei | June 26, 2015, 1:24 p.m. |
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268 |
82 | Bo Chen | June 8, 2015, 8:57 p.m. |
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227 |
81 | Alex Ostrovski | June 7, 2015, 2:43 p.m. |
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105 |
80 | Erika Álvarez | May 25, 2015, 1:07 a.m. |
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309 |
79 | RandyWaterhouse | May 21, 2015, 6:35 a.m. |
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311 |
78 | svengato | May 6, 2015, 5:04 a.m. | 319 | |
77 | Jerry Kiely | April 7, 2015, 7:04 a.m. |
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279 |
76 | kingofthepark | March 13, 2015, 11:29 p.m. |
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102 |
75 | photonic | Feb. 15, 2015, 8:16 a.m. |
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85 |
74 | Fredrik Bergroth | Feb. 12, 2015, 1:17 p.m. |
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194 |
73 | Kuan-Yi Li | Feb. 2, 2015, 3:53 p.m. | 152 | |
72 | Nikita Shpilevoy | Jan. 25, 2015, 8:45 p.m. |
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121 |
71 | Evgeny Karpov | Jan. 16, 2015, 4:28 p.m. |
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125 |
70 | spalac24 | Jan. 16, 2015, 9:38 a.m. |
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87 |
69 | Tarjei Mikkelsen | Jan. 1, 2015, 8:39 p.m. |
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174 |
68 | Peter Georgeson | Nov. 30, 2014, 10:13 a.m. |
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173 |
67 | max | Nov. 29, 2014, 11:45 p.m. |
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117 |
66 | Rok Kralj | Nov. 29, 2014, 4:15 p.m. |
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145 |
65 | Andy Bowes | Oct. 12, 2014, 1:38 p.m. |
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281 |
64 | Nikita Alexeev | Oct. 9, 2014, 5:37 a.m. |
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246 |
63 | Jeremy Teitelbaum | Aug. 24, 2014, 2:11 p.m. |
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96 |
62 | laurent.mazare | Aug. 16, 2014, 3:48 p.m. |
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211 |
61 | Oleg Martynov | Aug. 3, 2014, 10:08 a.m. |
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127 |
60 | Joel Southgate | Aug. 2, 2014, 12:42 a.m. | 100 | |
59 | inamori | July 30, 2014, 2:17 p.m. |
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305 |
58 | Yuanchao Zhang | May 16, 2014, 4:20 p.m. |
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111 |
57 | Zoya | May 16, 2014, midnight |
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105 |
56 | root | Feb. 7, 2014, 1:32 a.m. |
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228 |
55 | Rodrigo Marcuschi | Jan. 21, 2014, 2:11 p.m. |
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240 |
54 | Oren Livne | Jan. 6, 2014, 4:11 a.m. |
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144 |
53 | Tsai, Meng-Gen | Dec. 29, 2013, 12:11 p.m. |
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184 |
52 | Thad Edens | Dec. 11, 2013, 8:24 p.m. |
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104 |
51 | Ivan Komarov | Dec. 10, 2013, 9:26 p.m. |
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153 |
50 | Fernando Ferreira | Dec. 5, 2013, 10:42 p.m. |
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148 |
49 | Victor Frankenstein | Nov. 27, 2013, 12:09 p.m. |
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109 |
48 | smallfry | Oct. 30, 2013, 1:37 p.m. | 319 | |
47 | Alexander Nilov | Oct. 26, 2013, 3:32 p.m. |
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157 |
46 | Dmitry Bychenko | Oct. 21, 2013, 11:19 a.m. |
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250 |
45 | fsipiere | Oct. 17, 2013, 3:03 p.m. |
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99 |
44 | Pavel Kuznetsov | Oct. 13, 2013, 9:48 a.m. |
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107 |
43 | retunsky | Sept. 28, 2013, 4:32 a.m. | 77 | |
42 | oleglyamin | Sept. 21, 2013, 10:55 a.m. |
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113 |
41 | Andrey Popov | Sept. 21, 2013, 3:09 a.m. |
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319 |
40 | sk27 | Sept. 5, 2013, 1:06 a.m. |
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235 |
39 | Yury Grushetsky | Aug. 27, 2013, 9:35 p.m. |
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319 |
38 | Karlik | Aug. 13, 2013, 8:44 p.m. |
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77 |
37 | Russell (Noorista) Myers | Aug. 4, 2013, 1:57 a.m. |
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218 |
36 | Walter Vannini | Aug. 2, 2013, 4:52 a.m. |
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207 |
35 | David Eccles (gringer) | July 23, 2013, 5:48 a.m. |
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290 |
34 | HansWurst | July 17, 2013, 8:46 a.m. |
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101 |
33 | Tomaž Hočevar | June 22, 2013, 9:32 a.m. |
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206 |
32 | plainman | June 3, 2013, 2:39 p.m. |
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98 |
31 | Matthew Fahrbach | June 2, 2013, 6:13 p.m. |
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95 |
30 | Peter de Rivaz | June 1, 2013, 12:29 p.m. |
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157 |
29 | Kevin OConnor | May 17, 2013, 11:04 p.m. |
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112 |
28 | Chunxiao Song | May 16, 2013, 6:05 p.m. | 115 |