The IOI 2022 Competition

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All IOI2021 tasks are published under the Creative Commons Attribution (CC-BY) License.

Day 0 - Practice Session

Connected Towns
- Official English
- Test data and supplementary materials
Magic Cards
- Official English
- Test data and supplementary materials
Hoax Spreading
- Official English
- Test data and supplementary materials
Team Contests
- Official English
- Test data and supplementary materials

Day 1

Implementation Notice
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | it_IT | ja_JP | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | ru | sk_SK | sl_SI | th_TH | tr_TR | uk_UA | vi_VN | zh_CN | zh_MO | zh_TW
Catfish Farm
- Author: Lim Rui Yuan (Singapore), NUS High School
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | ru | sk_SK | sl_SI | sv_SE | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_CN | zh_MO | zh_TW
- Test data and supplementary materials
Prisoner Challenge
- Authors: Masataka Yoneda & Hirotaka Yoneda (Japan), The University of Tokyo
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | ru | sk_SK | sl_SI | sv_SE | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_CN | zh_MO | zh_TW
- Test data and supplementary materials
Radio Towers
- Author: Kevin Luiz Ponte Pucci (Portugal), Oporto University
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | ru | sk_SK | sl_SI | sv_SE | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_CN | zh_MO | zh_TW
- Test data and supplementary materials

Day 2

Implementation Notice
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | en_ISC | es_AR | es_BO | es_CL | es_CO | es_CU | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | it_IT | ja_JP | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | ru | sk_SK | sl_SI | th_TH | tr_TR | uk_UA | vi_VN | zh_CN | zh_MO | zh_TW
Digital Circuit
- Author: Prabowo Djonatan (Indonesia), Garena Singapore
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | ru | sk_SK | sl_SI | sv_SE | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_CN | zh_MO | zh_TW
- Test data and supplementary materials
Rarest Insects
- Author: Hazem Issa (Egypt), Egyptian Olympiad in Informatics (EOI)
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | ru | sk_SK | sl_SI | sv_SE | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_CN | zh_MO | zh_TW
- Test data and supplementary materials
Thousands Islands
- Author: Félix Moreno Peñarrubia (Spain), Universitat Polit`ecnica de Catalunya – BarcelonaTech
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | cs_CZ | de_AT | de_CH | de_DE | de_LU | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | ru | sk_SK | sl_SI | sv_SE | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_CN | zh_MO | zh_TW
- Test data and supplementary materials

IOI 2022 Problems Discussion