| 2100 | Lovekey | 32.38%(4057/12529) |
| 2101 | A + B Problem Too | 72.81%(18786/25803) |
| 2102 | A计划 | 24.77%(11800/47636) |
| 2103 | Family planning | 25.81%(4448/17236) |
| 2104 | hide handkerchief | 41.15%(7451/18109) |
| 2105 | The Center of Gravity | 57.24%(4873/8513) |
| 2106 | decimal system | 57.98%(4134/7130) |
| 2107 | Founding of HDU | 64.55%(10024/15529) |
| 2108 | Shape of HDU | 46.21%(5853/12665) |
| 2109 | Fighting for HDU | 50.65%(9322/18405) |
| 2110 | Crisis of HDU | 31.25%(2663/8521) |
| 2111 | Saving HDU | 42.79%(9853/23029) |
| 2112 | HDU Today | 23.72%(12729/53660) |
| 2113 | Secret Number | 41.49%(6609/15930) |
| 2114 | Calculate S(n) | 35.16%(5737/16316) |
| 2115 | I Love This Game | 34.14%(3493/10231) |
| 2116 | Has the sum exceeded | 23.06%(1275/5530) |
| 2117 | Just a Numble | 50.97%(2387/4683) |
| 2118 | Mouse | 30.30%(333/1099) |
| 2119 | Matrix | 47.19%(2057/4359) |
| 2120 | Ice_cream's world I | 56.04%(1671/2982) |
| 2121 | Ice_cream’s world II | 26.49%(2665/10060) |
| 2122 | Ice_cream’s world III | 35.48%(1126/3174) |
| 2123 | An easy problem | 68.22%(7445/10913) |
| 2124 | Repair the Wall | 46.42%(4299/9262) |
| 2125 | Local area network | 33.44%(421/1259) |
| 2126 | Buy the souvenirs | 39.10%(1686/4312) |
| 2127 | Polish notation | 16.79%(301/1793) |
| 2128 | Tempter of the Bone II | 29.54%(921/3118) |
| 2129 | Give the rank | 13.60%(91/669) |
| 2130 | Count the cuboids | 41.52%(240/578) |
| 2131 | Probability | 48.42%(5239/10820) |
| 2132 | An easy problem | 28.05%(4967/17708) |
| 2133 | What day is it | 27.78%(2874/10347) |
| 2134 | Cuts the cake | 64.89%(3022/4657) |
| 2135 | Rolling table | 48.23%(2156/4470) |
| 2136 | Largest prime factor | 33.44%(8365/25014) |
| 2137 | circumgyrate the string | 25.09%(2003/7984) |
| 2138 | How many prime numbers | 31.15%(12177/39091) |
| 2139 | Calculate the formula | 30.80%(4014/13031) |
| 2140 | Michael Scofield's letter | 57.73%(3206/5553) |
| 2141 | Can you find it? | 23.83%(15501/65040) |
| 2142 | disney | 28.94%(362/1251) |
| 2143 | box | 22.62%(2786/12315) |
| 2144 | Evolution | 29.62%(348/1175) |
| 2145 | zz's Mysterious Present | 24.32%(567/2331) |
| 2146 | The most binary substring | 21.68%(345/1591) |
| 2147 | kiki's game | 60.76%(11469/18877) |
| 2148 | Score | 61.51%(5888/9573) |
| 2149 | Public Sale | 56.47%(9421/16684) |
| 2150 | Pipe | 41.39%(1229/2969) |
| 2151 | Worm | 62.91%(3535/5619) |
| 2152 | Fruit | 58.76%(4357/7415) |
| 2153 | 仙人球的残影 | 47.84%(6048/12643) |
| 2154 | 跳舞毯 | 44.20%(4344/9829) |
| 2155 | 小黑的镇魂曲 | 21.99%(404/1837) |
| 2156 | 分数矩阵 | 55.63%(6814/12248) |
| 2157 | How many ways?? | 38.09%(2719/7139) |
| 2158 | 最短区间版大家来找碴 | 38.48%(755/1962) |
| 2159 | FATE | 46.11%(13880/30105) |
| 2160 | 母猪的故事 | 59.59%(10790/18106) |
| 2161 | Primes | 38.34%(10818/28215) |
| 2162 | Add ‘em | 70.00%(3874/5534) |
| 2163 | Palindromes | 52.52%(3529/6719) |
| 2164 | Rock, Paper, or Scissors? | 64.04%(2634/4113) |
| 2165 | Missile Command | 3.51%(8/228) |
| 2166 | Palindromic Primes Category in Jeopardy! | 12.99%(46/354) |
| 2167 | Pebbles | 56.02%(1424/2542) |
| 2168 | Rubik's Cube | 12.01%(40/333) |
| 2169 | Geek Challenge [SKRZAT] (Base Minus Two) | 36.20%(219/605) |
| 2170 | Frogger | 12.01%(49/408) |
| 2171 | “Bubble Gum, Bubble Gum, in the dish, how many pieces do you wish?” | 36.77%(214/582) |
| 2172 | Games R Us | 16.46%(26/158) |
| 2173 | Cover Up | 21.98%(51/232) |
| 2174 | Bridged Marble Rings | 31.42%(142/452) |
| 2175 | 汉诺塔IX | 56.70%(2120/3739) |
| 2176 | 取(m堆)石子游戏 | 61.55%(4118/6690) |
| 2177 | 取(2堆)石子游戏 | 60.91%(3517/5774) |
| 2178 | 猜数字 | 67.53%(7141/10575) |
| 2179 | pi | 45.87%(660/1439) |
| 2180 | 时钟 | 31.21%(787/2522) |
| 2181 | 哈密顿绕行世界问题 | 56.98%(8056/14138) |
| 2182 | Frog | 44.54%(1574/3534) |
| 2183 | 奇数阶魔方(II) | 64.16%(589/918) |
| 2184 | 汉诺塔VIII | 52.95%(628/1186) |
| 2185 | Chess | 36.99%(199/538) |
| 2186 | 悼念512汶川大地震遇难同胞——一定要记住我爱你 | 58.48%(10444/17860) |
| 2187 | 悼念512汶川大地震遇难同胞——老人是真饿了 | 40.54%(10173/25095) |
| 2188 | 悼念512汶川大地震遇难同胞——选拔志愿者 | 66.32%(10920/16465) |
| 2189 | 悼念512汶川大地震遇难同胞——来生一起走 | 51.63%(2509/4860) |
| 2190 | 悼念512汶川大地震遇难同胞——重建希望小学 | 66.21%(7430/11222) |
| 2191 | 悼念512汶川大地震遇难同胞——珍惜现在，感恩生活 | 42.63%(23216/54465) |
| 2192 | MagicBuilding | 46.22%(1590/3440) |
| 2193 | AVL Tree | 44.20%(640/1448) |
| 2194 | Help the vendor and get some M ^_^ | 39.06%(225/576) |
| 2195 | Monotone SE Min | 31.51%(144/457) |
| 2196 | Computer | 21.30%(10780/50605) |
| 2197 | 本原串 | 33.31%(893/2681) |
| 2198 | How many elements you must throw out? | 36.95%(262/709) |
| 2199 | Can you solve this equation? | 40.93%(17654/43137) |
