IOI 2025 [Discussion Thread]

Блог пользователя wasif2397

Автор wasif2397, история, 9 месяцев назад, По-английски

IOI 2025 is just around the corner. This year it'll be held in Sucre, Bolivia. Discuss things here including predictions, links for live scoreboards/streams, and solution for the tasks too maybe after they come out.

Here is the schedule for the main contest:

Contest Day 1 — Wednesday, 30th July, 10:00-15:00 GMT-4
Contest Day 2 — Friday, 1st August, 10:00-15:00 GMT-4
Closing Ceremony — Saturday, 2nd August, 16:30-19:30 GMT-4

Below are some important links:

IOI 2025 Website

Schedule

Errichto's Live Stream Day 1

Practice session problems

Leaderboard Day 1

Errichto's Live Stream Day 2

Congratulations to the Top 3

ioi, discussion

wasif2397
9 месяцев назад
33

Комментарии (33)

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Lever

9 месяцев назад, скрыть # |

+33

least blatant contrib farming fr

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zhlzt

9 месяцев назад, скрыть # |

+74

BreakPlay will win IOI 2025!

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Ashar-Usmani

9 месяцев назад, скрыть # |

-6

I believe orz vali will win IOI 2025

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vali

9 месяцев назад, скрыть # ^ |

+17

I am not participating and giving everyone else a chance.

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Maliza1388

9 месяцев назад, скрыть # |

+19

Hamed_Ghaffari will win IOI 2025!

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beaaaan

9 месяцев назад, скрыть # |

alexonsteve will AK IOI 2025!

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Abdalrhman

9 месяцев назад, скрыть # |

edogawa_something and Abito will win IOI 2025

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wasif2397

9 месяцев назад, скрыть # |

Auto comment: topic has been updated by wasif2397 (previous revision, new revision, compare).

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israel_orz

9 месяцев назад, скрыть # |

LGM of cheating trying hard to farm

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PengDoubleQLzn

9 месяцев назад, скрыть # |

BreakPlay will win IOI 2025! China Team Rp++!!

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YassirSalama4

9 месяцев назад, скрыть # |

Good luck to you guys in day 1 !

Have fun solving challenging problems. :-)

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iyedoo

9 месяцев назад, скрыть # ^ |

-7

Shut up and go to contest hall :)

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JanBobi

9 месяцев назад, скрыть # |

Where to watch on youtube?

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wasif2397

9 месяцев назад, скрыть # ^ |

I think Errichto's stream page on codeforces will get updated

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Errichto

9 месяцев назад, скрыть # ^ |

Just to clarify: it isn't an official stream from IOI. I hope that there will be a public leaderboard and problem statements. If so, I will have stuff to talk about.

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Enchom

9 месяцев назад, скрыть # ^ |

-8

There's usually a public leaderboard but I don't think I've seen the problems ever being published before the end.

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Pacybwoah

9 месяцев назад, скрыть # |

+23

Wei Wei will win IOI 2025!

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entropy07

9 месяцев назад, скрыть # |

Where is the leaderboard?

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Errichto

9 месяцев назад, скрыть # ^ |

https://ranking.ioi2025.bo/

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Kevin114514

9 месяцев назад, скрыть # |

practice session problems are here: https://qoj.ac/contest/2415 since Errichto asked

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wasif2397

9 месяцев назад, скрыть # |

Auto comment: topic has been updated by wasif2397 (previous revision, new revision, compare).

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al95ireyiz

9 месяцев назад, скрыть # |

-6

Nxxlt will win IOI !

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alagorithmet

9 месяцев назад, скрыть # |

← Rev. 3 →

+53

I ranked the countries by their average score on the number of students.

Day 1

China: 293.99 [4]
Republic of Korea: 254.56 [4]
Romania: 238.74 [4]
Poland: 237.06 [4]
Singapore: 224.50 [4]
Bulgaria: 224.14 [4]
Russia: 217.46 [4]
Australia: 210.07 [4]
Japan: 208.11 [4]
Kazakhstan: 197.99 [4]
Hungary: 194.67 [4]
Iran: 191.15 [4]
United States of America: 186.54 [4]
Vietnam: 185.75 [4]
Belarus: 185.52 [4]
United Kingdom: 184.65 [4]
Thailand: 176.97 [4]
Croatia: 176.10 [4]
Canada: 174.84 [4]
Türkiye: 174.22 [4]
Hong Kong — China: 171.43 [4]
Indonesia: 170.13 [4]
Taiwan: 169.41 [4]
Ukraine: 168.39 [4]
Egypt: 164.73 [4]
North Macedonia: 164.64 [4]
Brazil: 162.88 [4]
Switzerland: 162.82 [4]
Malaysia: 162.61 [4]
Italy: 160.48 [4]
France: 156.28 [4]
Serbia: 154.85 [4]
Spain: 154.50 [4]
India: 149.19 [4]
Kyrgyzstan: 148.64 [3]
Slovakia: 148.08 [4]
Uzbekistan: 147.38 [4]
Armenia: 146.61 [4]
Pakistan: 142.65 [4]
Cyprus: 139.42 [4]
Finland: 139.07 [3]
Azerbaijan: 138.60 [4]
Saudi Arabia: 137.11 [4]
Sweden: 136.70 [4]
New Zealand: 136.36 [4]
Germany: 135.72 [4]
Mexico: 133.84 [4]
Czech Republic: 129.92 [4]
Lithuania: 128.97 [4]
Netherlands: 127.20 [4]
Georgia: 126.75 [4]
Philippines: 125.15 [4]
Belgium: 124.47 [4]
Bosnia and Herzegovina: 122.33 [4]
Bangladesh: 120.86 [4]
Macao — China: 120.11 [4]
Cuba: 119.59 [4]
Austria: 116.40 [4]
Greece: 115.28 [4]
Mongolia: 110.44 [4]
Moldova: 109.62 [4]
Latvia: 105.70 [4]
South Africa: 103.68 [4]
Tunisia: 102.31 [2]
Argentina: 88.25 [4]
Morocco: 87.36 [4]
Libya: 85.09 [2]
Bolivia: 84.70 [4]
Iceland: 81.79 [3]
Norway: 81.41 [4]
Slovenia: 81.39 [4]
Chile: 78.98 [2]
Estonia: 77.41 [4]
Peru: 76.44 [4]
Denmark: 73.16 [4]
Portugal: 69.41 [4]
Bolivia 2: 68.16 [4]
Colombia: 60.41 [4]
Nigeria: 57.64 [3]
Ireland: 55.40 [4]
Luxembourg: 54.63 [4]
Dominican Republic: 51.63 [4]
El Salvador: 48.01 [3]
Algeria: 48.01 [4]
Rwanda: 27.76 [1]
Ecuador: 25.96 [4]
Ghana: 0.95 [4]

Overall average score: 137.00

Last year there were 94 countries, this year 86 :(

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alagorithmet

9 месяцев назад, скрыть # ^ |

+48

Day1+2

China: 547.45 [4]
Republic of Korea: 487.25 [4]
Romania: 476.28 [4]
Russia: 449.61 [4]
Bulgaria: 440.00 [4]
Singapore: 421.62 [4]
Japan: 414.80 [4]
Iran: 394.60 [4]
Poland: 390.25 [4]
Hungary: 388.21 [4]
Canada: 385.18 [4]
Vietnam: 384.70 [4]
United States of America: 382.49 [4]
Kazakhstan: 371.74 [4]
Australia: 361.64 [4]
Belarus: 353.98 [4]
Malaysia: 331.20 [4]
Indonesia: 327.57 [4]
Hong Kong — China: 327.45 [4]
United Kingdom: 320.15 [4]
Thailand: 318.50 [4]
Brazil: 317.89 [4]
Taiwan: 316.90 [4]
Serbia: 314.22 [4]
Croatia: 314.10 [4]
Ukraine: 305.37 [4]
Switzerland: 304.42 [4]
Egypt: 302.45 [4]
Azerbaijan: 293.29 [4]
North Macedonia: 290.76 [4]
India: 284.41 [4]
Pakistan: 282.76 [4]
Kyrgyzstan: 280.01 [3]
Armenia: 278.03 [4]
Türkiye: 274.64 [4]
France: 273.37 [4]
Slovakia: 271.86 [4]
Uzbekistan: 269.24 [4]
Italy: 267.69 [4]
New Zealand: 262.98 [4]
Spain: 260.95 [4]
Bangladesh: 238.24 [4]
Georgia: 233.32 [4]
Czech Republic: 231.39 [4]
Sweden: 228.70 [4]
Greece: 228.17 [4]
Saudi Arabia: 227.11 [4]
Cyprus: 225.67 [4]
Finland: 225.08 [3]
Germany: 224.72 [4]
Lithuania: 224.72 [4]
Mexico: 222.72 [4]
Philippines: 220.40 [4]
Netherlands: 219.72 [4]
Belgium: 209.54 [4]
Austria: 207.68 [4]
Mongolia: 205.91 [4]
Macao — China: 205.85 [4]
Cuba: 196.59 [4]
Moldova: 195.65 [4]
Bosnia and Herzegovina: 192.57 [4]
South Africa: 182.44 [4]
Latvia: 181.96 [4]
Argentina: 170.50 [4]
Tunisia: 167.81 [2]
Libya: 165.10 [2]
Iceland: 162.79 [3]
Morocco: 160.11 [4]
Norway: 157.16 [4]
Chile: 153.49 [2]
Bolivia: 149.20 [4]
Estonia: 147.41 [4]
Slovenia: 133.13 [4]
Peru: 126.69 [4]
Denmark: 125.91 [4]
Colombia: 116.66 [4]
Bolivia 2: 110.66 [4]
Portugal: 105.64 [4]
Ireland: 98.64 [4]
Nigeria: 90.97 [3]
El Salvador: 90.68 [3]
Algeria: 89.75 [4]
Luxembourg: 74.66 [4]
Dominican Republic: 66.39 [4]
Ecuador: 36.71 [4]
Rwanda: 32.76 [1]
Ghana: 2.20 [4]

Overall average score: 251.77

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alagorithmet

9 месяцев назад, скрыть # ^ |

+24

more details -- i hope i am not spamming :|

10 countries that competed in 2024 but did not compete in 2025: Israel, Syria, Sri Lanka,Tajikistan, Palestine, Turkmenistan, Jordan, Montenegro, Venezuela, Albania.

This year Rwanda competed for the first time in the history and Ghana competed for the first time after 2011.

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