Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
IOI '94 P1 - The Triangle IOI 7p 56.5% 1480
IOI '04 P4 - Phidias IOI 10p 53.5% 885
IOI '00 P1 - Palindrome IOI 10p 18.5% 829
IOI '01 P1 - Mobile Phones IOI 15p 27.5% 703
IOI '09 P4 - Raisins IOI 10p 55.4% 543
IOI '09 P5 - Garage IOI 7 46.4% 532
IOI '13 P1 - Dreaming (Standard I/O) IOI 15p 18.4% 531
IOI '11 P2 - Race (Standard I/O) IOI 17p 15.2% 530
IOI '09 P3 - POI IOI 7 28.8% 528
IOI '11 P3 - Rice Hub (Standard I/O) IOI 15p 19.5% 496
IOI '07 P4 - Miners IOI 15p 21.3% 444
IOI '06 P1 - Deciphering the Mayan Writing IOI 7p 39.5% 433
IOI '10 P6 - Traffic Congestion (Standard I/O) IOI 10p 33.0% 416
IOI '08 P1 - Type Printer IOI 12p 20.0% 409
IOI '11 P4 - Crocodile's Underground City (Standard I/O) IOI 17p 19.1% 374
IOI '10 P3 - Quality of Living (Standard I/O) IOI 15p 28.0% 337
IOI '09 P6 - Mecho IOI 15 14.8% 324
IOI '02 P4 - Batch Scheduling IOI 20p 37.6% 320
IOI '13 P4 - Cave IOI 10p 18.6% 311
IOI '05 P3 - Mountain IOI 20p 13.4% 297
IOI '14 P2 - Wall (Standard I/O) IOI 20p 15.9% 286
IOI '05 P6 - Rivers IOI 20p 29.9% 283
IOI '13 P5 - Robots (Standard I/O) IOI 20p 15.0% 278
IOI '12 P3 - Crayfish Scrivener (Standard I/O) IOI 15p 16.8% 276
IOI '05 P2 - Mean Sequence IOI 12p 20.8% 270
IOI '96 P1 - A Game IOI 10 39.3% 268
IOI '05 P1 - Garden IOI 20p 21.7% 252
IOI '09 P2 - Hiring IOI 12p 32.3% 251
IOI '16 P1 - Detecting Molecules (Standard I/O) IOI 12p 14.1% 230
IOI '13 P1 - Dreaming IOI 15p 22.9% 227
IOI '98 P4 - Picture IOI 15p 31.0% 224
IOI '00 P4 - Walls IOI 12 35.9% 224
IOI '14 P4 - Gondola (Standard I/O) IOI 15 8.5% 222
IOI '14 P3 - Game IOI 20p 27.8% 217
IOI '06 P2 - Pyramid IOI 17p 22.5% 217
IOI '06 P4 - The Valley of Mexico IOI 15p 22.0% 214
IOI '14 P2 - Wall IOI 20p 24.7% 211
IOI '04 P5 - Farmer IOI 15p 13.3% 210
IOI '07 P3 - Sails IOI 25p 21.5% 210
IOI '11 P2 - Race IOI 17p 18.5% 207
IOI '99 P1 - Little Shop of Flowers IOI 10 30.6% 204
IOI '14 P5 - Friend (Standard I/O) IOI 30p 18.2% 189
IOI '04 P2 - Hermes IOI 15p 23.5% 188
IOI '15 P1 - Boxes with Souvenirs (Standard I/O) IOI 15p 8.3% 188
IOI '15 P5 - Sorting (Standard I/O) IOI 25p 18.6% 186
IOI '00 P5 - Post Office IOI 15p 40.6% 183
IOI '18 P1 - Combo IOI 15p 15.0% 179
IOI '14 Practice Task 1 - Square IOI 10p 44.3% 179
IOI '98 P3 - Party Lamps IOI 12p 34.0% 168
IOI '11 P1 - Tropical Garden (Standard I/O) IOI 25p 11.8% 166