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| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
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| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
| ID | Title | Ratio(AC/submit) | Date |
| 1138 | Ships | 13%(151/1098) | Jul 19, 2026 |
| 1133 | Stars | 17%(200/1135) | Jul 19, 2026 |
| 1136 | Pendulum | 19%(99/504) | Jul 19, 2026 |
| 1193 | 内存分配 | 20%(1178/5837) | Jul 19, 2026 |
| 1199 | Left labyrinths | 20%(138/675) | Jul 19, 2026 |
| 1100 | Dreisam Equations | 20%(778/3794) | Jul 18, 2026 |
| 1194 | HIDDEN CODES | 20%(144/698) | Jul 19, 2026 |
| 1115 | Statistical Trouble | 22%(104/467) | Jul 18, 2026 |
| 1184 | 聪明的打字员 | 22%(2156/9524) | Jul 19, 2026 |
| 1172 | Street Race | 23%(309/1338) | Jul 19, 2026 |
| 1153 | SAFE | 24%(281/1148) | May 14, 2026 |
| 1119 | Start Up the Startup | 24%(615/2483) | Jul 18, 2026 |
| 1135 | Domino Effect | 24%(3393/13574) | Jul 18, 2026 |
| 1145 | Tree Summing | 25%(2340/9097) | Jul 18, 2026 |
| 1117 | Pairs of Integers | 25%(1158/4484) | Jul 18, 2026 |
| 1197 | Depot | 25%(152/586) | Jul 19, 2026 |
| 1152 | An Easy Problem! | 26%(2505/9611) | Jul 18, 2026 |
| 1109 | Index Generation | 26%(129/482) | Jul 20, 2026 |
| 1112 | Team Them Up! | 27%(2539/9359) | Jul 18, 2026 |
| 1124 | Oh, Those Achin' Feet | 27%(159/586) | Jul 18, 2026 |
| 1162 | Building with Blocks | 27%(163/600) | May 26, 2026 |
| 1171 | Letter Game | 27%(3423/12514) | Jul 19, 2026 |
| 1167 | The Buses | 27%(2240/8178) | Jul 19, 2026 |
| 1168 | The Circle | 27%(293/1050) | Jul 19, 2026 |
| 1174 | Contact | 27%(824/2948) | Jul 19, 2026 |
| 1141 | Brackets Sequence | 28%(11752/41030) | Jul 18, 2026 |
| 1181 | Bus Terminals | 29%(232/777) | Jun 9, 2026 |
| 1137 | The New Villa | 29%(607/2031) | Jul 19, 2026 |
| 1156 | A STRIP OF LAND | 30%(2115/7038) | Jul 19, 2026 |
| 1182 | 食物链 | 30%(45172/149640) | Jul 19, 2026 |
| 1150 | The Last Non-zero Digit | 31%(1928/6208) | Jul 19, 2026 |
| 1118 | Lining Up | 31%(8718/27991) | Jul 20, 2026 |
| 1123 | For the Porsche | 31%(172/549) | Jul 19, 2026 |
| 1122 | FDNY to the Rescue! | 31%(1137/3619) | Jul 19, 2026 |
| 1189 | 钉子和小球 | 31%(3001/9485) | Jul 22, 2026 |
| 1196 | Twofive | 31%(184/581) | Jul 19, 2026 |
| 1139 | Cat and Mouse | 31%(390/1222) | Jul 18, 2026 |
| 1186 | 方程的解数 | 32%(3035/9263) | Jul 19, 2026 |
| 1101 | The Game | 32%(5274/15994) | Jul 18, 2026 |
| 1198 | Solitaire | 32%(1715/5200) | Jul 19, 2026 |
| 1142 | Smith Numbers | 33%(5470/16477) | Jul 18, 2026 |
| 1176 | Party Lamps | 33%(1748/5246) | Jul 20, 2026 |
| 1151 | Atlantis | 33%(12717/38043) | Jul 19, 2026 |
| 1121 | Algernon's Noxious Emissions | 33%(179/535) | Jul 18, 2026 |
| 1113 | Wall | 33%(16396/48522) | Jul 21, 2026 |
| 1128 | Frame Stacking | 34%(2253/6497) | Jul 18, 2026 |
| 1159 | Palindrome | 35%(28410/81011) | Jul 20, 2026 |
| 1116 | Library | 35%(374/1063) | Jul 18, 2026 |
| 1191 | 棋盘分割 | 35%(6493/18221) | Jul 19, 2026 |
| 1190 | 生日蛋糕 | 35%(13317/37289) | Jul 19, 2026 |
| 1183 | 反正切函数的应用 | 35%(5952/16568) | Jul 19, 2026 |
| 1148 | Utopia Divided | 36%(448/1224) | Jul 19, 2026 |
| 1173 | Bar Codes | 36%(510/1384) | Jun 25, 2026 |
| 1130 | Alien Security | 37%(1200/3240) | Jul 18, 2026 |
| 1175 | Starry Night | 37%(880/2325) | Jul 19, 2026 |
| 1140 | Expanding Fractions | 38%(1495/3922) | Jul 19, 2026 |
| 1185 | 炮兵阵地 | 38%(17040/44434) | Jul 21, 2026 |
| 1165 | The Primes | 39%(898/2286) | Jul 19, 2026 |
| 1187 | 陨石的秘密 | 39%(1201/3048) | Jun 22, 2026 |
| 1147 | Binary codes | 39%(2604/6550) | Jul 19, 2026 |
| 1102 | LC-Display | 40%(6965/17399) | Jul 18, 2026 |
| 1104 | Robbery | 40%(550/1364) | Jul 18, 2026 |
| 1110 | Double Vision | 40%(260/638) | Jul 18, 2026 |
| 1114 | Chemical Reactions | 41%(424/1032) | Jul 18, 2026 |
| 1143 | Number Game | 41%(1784/4332) | Jul 19, 2026 |
| 1166 | The Clocks | 41%(8619/20790) | Jul 18, 2026 |
| 1158 | TRAFFIC LIGHTS | 41%(3150/7544) | May 26, 2026 |
| 1170 | Shopping Offers | 42%(2659/6286) | Jul 19, 2026 |
| 1144 | Network | 42%(10709/25311) | Jul 21, 2026 |
| 1179 | Polygon | 42%(3708/8689) | Jul 22, 2026 |
| 1103 | Maze | 42%(842/1973) | Jul 18, 2026 |
| 1134 | Hexagon | 44%(223/505) | Jul 19, 2026 |
| 1154 | LETTERS | 44%(4473/10071) | Jul 21, 2026 |
| 1126 | Simply Syntax | 44%(2679/6004) | Jul 18, 2026 |
| 1178 | Camelot | 44%(1887/4216) | Jul 19, 2026 |
| 1127 | Jack Straws | 44%(3102/6926) | Jul 18, 2026 |
| 1149 | PIGS | 44%(12017/26759) | Jul 22, 2026 |
| 1195 | Mobile phones | 44%(12852/28600) | Jul 21, 2026 |
| 1157 | LITTLE SHOP OF FLOWERS | 45%(11507/25250) | Jul 18, 2026 |
| 1180 | Batch Scheduling | 46%(2876/6226) | Jul 20, 2026 |
| 1161 | Walls | 47%(3965/8410) | Jul 22, 2026 |
| 1120 | A New Growth Industry | 47%(1360/2878) | Jul 18, 2026 |
| 1132 | Border | 47%(2067/4311) | Jul 18, 2026 |
| 1106 | Transmitters | 48%(3701/7683) | Jul 21, 2026 |
| 1169 | Packing Rectangles | 48%(700/1430) | Jul 19, 2026 |
| 1107 | W's Cipher | 49%(3024/6140) | Jul 18, 2026 |
| 1108 | Split Windows | 50%(211/421) | Jul 18, 2026 |
| 1105 | S-Trees | 50%(1581/3153) | Jul 18, 2026 |
| 1129 | Channel Allocation | 50%(11510/22870) | Jul 18, 2026 |
| 1177 | Picture | 50%(9080/18019) | Jul 22, 2026 |
| 1192 | 最优连通子集 | 52%(1921/3643) | Jul 19, 2026 |
| 1188 | Gleaming the Cubes | 52%(846/1597) | Jul 19, 2026 |
| 1131 | Octal Fractions | 53%(4553/8567) | Jul 18, 2026 |
| 1160 | Post Office | 53%(13555/25462) | Jul 18, 2026 |
| 1164 | The Castle | 55%(5832/10540) | Jul 18, 2026 |
| 1155 | TELE | 55%(4000/7216) | Jul 19, 2026 |
| 1125 | Stockbroker Grapevine | 56%(25804/45935) | Jul 18, 2026 |
| 1111 | Image Perimeters | 57%(6138/10666) | Jul 18, 2026 |
| 1146 | ID Codes | 58%(5311/9120) | Jul 18, 2026 |
| 1163 | The Triangle | 59%(46897/78710) | Jul 21, 2026 |
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