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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 |
| 1108 | Split Windows | 49%(208/417) | Oct 13, 2025 |
| 1115 | Statistical Trouble | 24%(102/419) | Oct 13, 2025 |
| 1109 | Index Generation | 27%(122/443) | Oct 13, 2025 |
| 1136 | Pendulum | 19%(96/497) | Dec 9, 2025 |
| 1134 | Hexagon | 43%(220/502) | Dec 9, 2025 |
| 1121 | Algernon's Noxious Emissions | 33%(176/530) | Nov 20, 2025 |
| 1123 | For the Porsche | 30%(165/540) | Jan 8, 2026 |
| 1196 | Twofive | 31%(182/573) | Dec 13, 2025 |
| 1197 | Depot | 24%(142/574) | Jan 8, 2026 |
| 1124 | Oh, Those Achin' Feet | 26%(155/577) | Dec 9, 2025 |
| 1162 | Building with Blocks | 27%(162/598) | Dec 1, 2025 |
| 1110 | Double Vision | 40%(254/629) | Jan 8, 2026 |
| 1199 | Left labyrinths | 20%(135/651) | Jan 8, 2026 |
| 1194 | HIDDEN CODES | 20%(139/687) | Jan 7, 2026 |
| 1181 | Bus Terminals | 29%(229/765) | Jan 8, 2026 |
| 1114 | Chemical Reactions | 40%(421/1029) | Oct 13, 2025 |
| 1168 | The Circle | 28%(292/1035) | Jan 8, 2026 |
| 1116 | Library | 35%(372/1059) | Oct 13, 2025 |
| 1138 | Ships | 13%(147/1087) | Dec 9, 2025 |
| 1133 | Stars | 17%(196/1123) | Dec 9, 2025 |
| 1153 | SAFE | 24%(271/1126) | Nov 21, 2025 |
| 1148 | Utopia Divided | 36%(448/1215) | Dec 9, 2025 |
| 1139 | Cat and Mouse | 31%(387/1218) | Nov 21, 2025 |
| 1172 | Street Race | 22%(305/1331) | Dec 9, 2025 |
| 1104 | Robbery | 40%(545/1354) | Jan 7, 2026 |
| 1173 | Bar Codes | 36%(505/1371) | Dec 9, 2025 |
| 1169 | Packing Rectangles | 48%(690/1418) | Dec 9, 2025 |
| 1188 | Gleaming the Cubes | 52%(834/1583) | Jan 8, 2026 |
| 1103 | Maze | 42%(837/1966) | Oct 13, 2025 |
| 1137 | The New Villa | 29%(604/2024) | Jan 8, 2026 |
| 1165 | The Primes | 39%(895/2275) | Jan 8, 2026 |
| 1175 | Starry Night | 37%(877/2322) | Nov 21, 2025 |
| 1119 | Start Up the Startup | 24%(611/2479) | Oct 14, 2025 |
| 1120 | A New Growth Industry | 47%(1359/2877) | Oct 13, 2025 |
| 1174 | Contact | 27%(815/2933) | Jan 10, 2026 |
| 1187 | 陨石的秘密 | 39%(1200/3046) | Dec 9, 2025 |
| 1105 | S-Trees | 50%(1576/3148) | Oct 13, 2025 |
| 1130 | Alien Security | 36%(1197/3237) | Dec 9, 2025 |
| 1122 | FDNY to the Rescue! | 31%(1133/3614) | Dec 9, 2025 |
| 1192 | 最优连通子集 | 52%(1918/3637) | Nov 21, 2025 |
| 1100 | Dreisam Equations | 20%(768/3756) | Jan 8, 2026 |
| 1140 | Expanding Fractions | 37%(1485/3909) | Jan 8, 2026 |
| 1178 | Camelot | 44%(1884/4213) | Dec 9, 2025 |
| 1132 | Border | 47%(2063/4307) | Nov 21, 2025 |
| 1143 | Number Game | 41%(1782/4321) | Jan 8, 2026 |
| 1117 | Pairs of Integers | 25%(1149/4454) | Oct 14, 2025 |
| 1198 | Solitaire | 32%(1711/5191) | Dec 9, 2025 |
| 1176 | Party Lamps | 33%(1735/5225) | Nov 20, 2025 |
| 1193 | 内存分配 | 20%(1175/5827) | Jan 7, 2026 |
| 1126 | Simply Syntax | 44%(2675/6000) | Jan 8, 2026 |
| 1107 | W's Cipher | 49%(3021/6137) | Oct 13, 2025 |
| 1150 | The Last Non-zero Digit | 31%(1915/6166) | Jan 8, 2026 |
| 1180 | Batch Scheduling | 46%(2852/6196) | Dec 21, 2025 |
| 1170 | Shopping Offers | 42%(2655/6280) | Nov 20, 2025 |
| 1128 | Frame Stacking | 34%(2235/6453) | Jan 8, 2026 |
| 1147 | Binary codes | 39%(2601/6546) | Dec 9, 2025 |
| 1127 | Jack Straws | 44%(3092/6912) | Jan 8, 2026 |
| 1156 | A STRIP OF LAND | 29%(2107/7025) | Jan 8, 2026 |
| 1155 | TELE | 55%(3987/7195) | Jan 8, 2026 |
| 1158 | TRAFFIC LIGHTS | 41%(3146/7533) | Jan 7, 2026 |
| 1106 | Transmitters | 47%(3662/7635) | Jan 6, 2026 |
| 1167 | The Buses | 27%(2238/8164) | Jan 7, 2026 |
| 1161 | Walls | 47%(3960/8401) | Dec 16, 2025 |
| 1131 | Octal Fractions | 53%(4551/8563) | Jan 7, 2026 |
| 1179 | Polygon | 42%(3702/8679) | Dec 22, 2025 |
| 1146 | ID Codes | 58%(5275/9081) | Jan 7, 2026 |
| 1145 | Tree Summing | 25%(2336/9091) | Dec 16, 2025 |
| 1186 | 方程的解数 | 32%(3034/9262) | Dec 9, 2025 |
| 1112 | Team Them Up! | 27%(2539/9322) | Nov 23, 2025 |
| 1184 | 聪明的打字员 | 22%(2154/9470) | Dec 15, 2025 |
| 1189 | 钉子和小球 | 31%(2997/9478) | Dec 9, 2025 |
| 1152 | An Easy Problem! | 26%(2496/9595) | Jan 7, 2026 |
| 1154 | LETTERS | 44%(4460/10050) | Jan 7, 2026 |
| 1164 | The Castle | 55%(5796/10490) | Jan 8, 2026 |
| 1111 | Image Perimeters | 57%(6135/10663) | Nov 17, 2025 |
| 1171 | Letter Game | 27%(3420/12511) | Dec 9, 2025 |
| 1135 | Domino Effect | 24%(3377/13536) | Jan 8, 2026 |
| 1101 | The Game | 32%(5271/15986) | Nov 16, 2025 |
| 1142 | Smith Numbers | 33%(5459/16460) | Jan 7, 2026 |
| 1183 | 反正切函数的应用 | 35%(5946/16560) | Nov 20, 2025 |
| 1102 | LC-Display | 40%(6956/17384) | Oct 18, 2025 |
| 1177 | Picture | 50%(9063/17988) | Dec 9, 2025 |
| 1191 | 棋盘分割 | 35%(6488/18211) | Dec 9, 2025 |
| 1166 | The Clocks | 41%(8605/20771) | Jan 8, 2026 |
| 1129 | Channel Allocation | 50%(11405/22745) | Dec 25, 2025 |
| 1157 | LITTLE SHOP OF FLOWERS | 45%(11498/25234) | Jan 7, 2026 |
| 1144 | Network | 42%(10679/25238) | Jan 9, 2026 |
| 1160 | Post Office | 53%(13524/25417) | Nov 20, 2025 |
| 1149 | PIGS | 44%(11978/26701) | Jan 8, 2026 |
| 1118 | Lining Up | 31%(8695/27943) | Jan 8, 2026 |
| 1195 | Mobile phones | 44%(12820/28551) | Dec 25, 2025 |
| 1190 | 生日蛋糕 | 35%(13169/36993) | Jan 8, 2026 |
| 1151 | Atlantis | 33%(12598/37793) | Jan 8, 2026 |
| 1141 | Brackets Sequence | 28%(11731/40988) | Jan 8, 2026 |
| 1185 | 炮兵阵地 | 38%(17024/44412) | Jan 8, 2026 |
| 1125 | Stockbroker Grapevine | 56%(25696/45767) | Dec 21, 2025 |
| 1113 | Wall | 33%(16362/48474) | Dec 23, 2025 |
| 1163 | The Triangle | 59%(46537/78242) | Jan 9, 2026 |
| 1159 | Palindrome | 35%(28327/80779) | Dec 9, 2025 |
| 1182 | 食物链 | 30%(45107/149496) | Jan 7, 2026 |
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