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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 |
| 1100 | Dreisam Equations | 20%(769/3770) | May 14, 2026 |
| 1101 | The Game | 32%(5272/15992) | May 8, 2026 |
| 1102 | LC-Display | 40%(6962/17395) | May 10, 2026 |
| 1103 | Maze | 42%(839/1969) | Apr 11, 2026 |
| 1104 | Robbery | 40%(548/1360) | Jun 3, 2026 |
| 1105 | S-Trees | 50%(1577/3149) | Apr 11, 2026 |
| 1106 | Transmitters | 48%(3687/7664) | May 14, 2026 |
| 1107 | W's Cipher | 49%(3022/6138) | Apr 11, 2026 |
| 1108 | Split Windows | 49%(209/419) | Apr 11, 2026 |
| 1109 | Index Generation | 26%(124/471) | May 14, 2026 |
| 1110 | Double Vision | 40%(257/635) | Apr 12, 2026 |
| 1111 | Image Perimeters | 57%(6137/10665) | Apr 12, 2026 |
| 1112 | Team Them Up! | 27%(2539/9355) | Jun 3, 2026 |
| 1113 | Wall | 33%(16382/48502) | May 9, 2026 |
| 1114 | Chemical Reactions | 41%(423/1031) | May 9, 2026 |
| 1115 | Statistical Trouble | 22%(103/466) | Jun 3, 2026 |
| 1116 | Library | 35%(373/1061) | May 9, 2026 |
| 1117 | Pairs of Integers | 25%(1157/4483) | May 14, 2026 |
| 1118 | Lining Up | 31%(8715/27981) | May 14, 2026 |
| 1119 | Start Up the Startup | 24%(614/2482) | May 7, 2026 |
| 1120 | A New Growth Industry | 47%(1359/2877) | Oct 13, 2025 |
| 1121 | Algernon's Noxious Emissions | 33%(178/534) | Apr 12, 2026 |
| 1122 | FDNY to the Rescue! | 31%(1135/3616) | Apr 12, 2026 |
| 1123 | For the Porsche | 31%(171/548) | May 6, 2026 |
| 1124 | Oh, Those Achin' Feet | 27%(158/585) | May 7, 2026 |
| 1125 | Stockbroker Grapevine | 56%(25737/45840) | Jun 4, 2026 |
| 1126 | Simply Syntax | 44%(2678/6003) | Mar 25, 2026 |
| 1127 | Jack Straws | 44%(3101/6925) | Apr 12, 2026 |
| 1128 | Frame Stacking | 34%(2249/6479) | May 26, 2026 |
| 1129 | Channel Allocation | 50%(11449/22806) | Jun 4, 2026 |
| 1130 | Alien Security | 37%(1199/3239) | Apr 12, 2026 |
| 1131 | Octal Fractions | 53%(4552/8566) | Mar 21, 2026 |
| 1132 | Border | 47%(2066/4310) | May 14, 2026 |
| 1133 | Stars | 17%(199/1134) | May 7, 2026 |
| 1134 | Hexagon | 44%(222/504) | Apr 12, 2026 |
| 1135 | Domino Effect | 24%(3389/13567) | Jun 3, 2026 |
| 1136 | Pendulum | 19%(98/503) | May 20, 2026 |
| 1137 | The New Villa | 29%(606/2029) | Apr 12, 2026 |
| 1138 | Ships | 13%(150/1097) | May 7, 2026 |
| 1139 | Cat and Mouse | 31%(389/1221) | Apr 12, 2026 |
| 1140 | Expanding Fractions | 38%(1494/3921) | May 9, 2026 |
| 1141 | Brackets Sequence | 28%(11746/41018) | May 25, 2026 |
| 1142 | Smith Numbers | 33%(5469/16476) | Jun 3, 2026 |
| 1143 | Number Game | 41%(1782/4330) | Mar 26, 2026 |
| 1144 | Network | 42%(10704/25306) | Jun 3, 2026 |
| 1145 | Tree Summing | 25%(2338/9095) | May 20, 2026 |
| 1146 | ID Codes | 58%(5304/9113) | Jun 3, 2026 |
| 1147 | Binary codes | 39%(2603/6549) | Apr 12, 2026 |
| 1148 | Utopia Divided | 36%(448/1218) | May 26, 2026 |
| 1149 | PIGS | 44%(12005/26740) | May 28, 2026 |
| 1150 | The Last Non-zero Digit | 31%(1927/6207) | May 7, 2026 |
| 1151 | Atlantis | 33%(12664/37974) | Jun 4, 2026 |
| 1152 | An Easy Problem! | 26%(2504/9605) | May 7, 2026 |
| 1153 | SAFE | 24%(281/1148) | May 14, 2026 |
| 1154 | LETTERS | 44%(4470/10063) | Apr 13, 2026 |
| 1155 | TELE | 55%(3999/7215) | May 7, 2026 |
| 1156 | A STRIP OF LAND | 30%(2114/7037) | May 26, 2026 |
| 1157 | LITTLE SHOP OF FLOWERS | 45%(11505/25248) | May 26, 2026 |
| 1158 | TRAFFIC LIGHTS | 41%(3150/7544) | May 26, 2026 |
| 1159 | Palindrome | 35%(28406/81004) | Jun 3, 2026 |
| 1160 | Post Office | 53%(13549/25456) | Jun 3, 2026 |
| 1161 | Walls | 47%(3961/8403) | May 26, 2026 |
| 1162 | Building with Blocks | 27%(163/600) | May 26, 2026 |
| 1163 | The Triangle | 59%(46708/78491) | Jun 4, 2026 |
| 1164 | The Castle | 55%(5831/10539) | May 31, 2026 |
| 1165 | The Primes | 39%(897/2285) | May 26, 2026 |
| 1166 | The Clocks | 41%(8617/20788) | May 26, 2026 |
| 1167 | The Buses | 27%(2239/8177) | May 26, 2026 |
| 1168 | The Circle | 27%(293/1049) | May 27, 2026 |
| 1169 | Packing Rectangles | 48%(695/1423) | May 26, 2026 |
| 1170 | Shopping Offers | 42%(2656/6281) | May 26, 2026 |
| 1171 | Letter Game | 27%(3421/12512) | May 26, 2026 |
| 1172 | Street Race | 22%(307/1336) | May 26, 2026 |
| 1173 | Bar Codes | 36%(506/1380) | May 26, 2026 |
| 1174 | Contact | 27%(822/2946) | May 26, 2026 |
| 1175 | Starry Night | 37%(878/2323) | May 26, 2026 |
| 1176 | Party Lamps | 33%(1744/5239) | May 26, 2026 |
| 1177 | Picture | 50%(9074/18011) | May 18, 2026 |
| 1178 | Camelot | 44%(1885/4214) | May 26, 2026 |
| 1179 | Polygon | 42%(3704/8682) | May 26, 2026 |
| 1180 | Batch Scheduling | 46%(2862/6210) | May 26, 2026 |
| 1181 | Bus Terminals | 29%(232/774) | May 27, 2026 |
| 1182 | 食物链 | 30%(45158/149616) | Jun 3, 2026 |
| 1183 | 反正切函数的应用 | 35%(5950/16566) | May 26, 2026 |
| 1184 | 聪明的打字员 | 22%(2156/9520) | May 26, 2026 |
| 1185 | 炮兵阵地 | 38%(17032/44422) | May 26, 2026 |
| 1186 | 方程的解数 | 32%(3034/9262) | Dec 9, 2025 |
| 1187 | 陨石的秘密 | 39%(1201/3047) | May 26, 2026 |
| 1188 | Gleaming the Cubes | 52%(845/1596) | May 27, 2026 |
| 1189 | 钉子和小球 | 31%(2998/9482) | May 26, 2026 |
| 1190 | 生日蛋糕 | 35%(13315/37286) | Jun 3, 2026 |
| 1191 | 棋盘分割 | 35%(6492/18220) | May 26, 2026 |
| 1192 | 最优连通子集 | 52%(1919/3641) | May 26, 2026 |
| 1193 | 内存分配 | 20%(1177/5836) | May 26, 2026 |
| 1194 | HIDDEN CODES | 20%(144/697) | May 27, 2026 |
| 1195 | Mobile phones | 44%(12841/28584) | May 31, 2026 |
| 1196 | Twofive | 31%(183/580) | May 27, 2026 |
| 1197 | Depot | 25%(151/585) | May 14, 2026 |
| 1198 | Solitaire | 32%(1714/5199) | May 9, 2026 |
| 1199 | Left labyrinths | 20%(137/674) | May 14, 2026 |
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