The IOI 2023 Competition

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All IOI2023 tasks are published under the Creative Commons Attribution (CC-BY) License.

Day 0 - Practice Session

Day 1

Implementation Notice
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | bs_BA | cnr_ME | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_DO | es_EC | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | id_ID | 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 | IOI1 | IOI2 | si_LK | sk_SK | sl_SI | sr_RS | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_Hans_CN | zh_MO | zh_TW
Closing Time
- Authors: Hirotaka Yoneda , Masataka Yoneda (Japan)
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | bs_BA | cnr_ME | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_DO | es_EC | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | id_ID | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mk_MK | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | IOI1 | IOI2 | si_LK | sk_SK | sl_SI | sr_RS | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_Hans_CN | zh_MO | zh_TW
- Test data and supplementary materials
Longest Trip
- Author: Hazem Issa (Egypt)
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | bs_BA | cnr_ME | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_DO | es_EC | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | id_ID | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mk_MK | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | IOI1 | IOI2 | si_LK | sk_SK | sl_SI | sr_RS | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_Hans_CN | zh_MO | zh_TW
- Test data and supplementary materials
Soccer
- Authors: Hirotaka Yoneda , Masataka Yoneda (Japan)
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | bs_BA | cnr_ME | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | es_AR | es_BO | es_CL | es_CO | es_CU | es_DO | es_EC | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | id_ID | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mk_MK | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | IOI1 | IOI2 | si_LK | sk_SK | sl_SI | sr_RS | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_Hans_CN | zh_MO | zh_TW
- Test data and supplementary materials

Day 2

Implementation Notice
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | bs_BA | cnr_ME | de_AT | de_CH | de_DE | el_CY | el_GR | en | en_PS | en_TN |es_AR | es_BO | es_CL | es_CO | es_CU | es_DO | es_EC | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | id_ID | 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 | IOI1 | IOI2 | sk_SK | sl_SI | sr_RS | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_Hans_CN | zh_MO | zh_TW
Beech Tree
- Authors: Alireza Keshavarz , Seyed Amir Mohammad Shahrezaei (Iran)
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | bs_BA | cnr_ME | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | en | en_PS | en_TN | es_AR | es_BO | es_CL | es_CO | es_CU | es_DO | es_EC | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | id_ID | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mk_MK | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | IOI1 | IOI2 | sk_SK | sl_SI | sr_RS | sv_SE | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_Hans_CN | zh_MO | zh_TW
- Test data and supplementary materials
Overtaking
- Author: Bernard Teo (Singapore)
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | bs_BA | cnr_ME | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | en | en_PS | en_TN | es_AR | es_BO | es_CL | es_CO | es_CU | es_DO | es_EC | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | id_ID | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mk_MK | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | IOI1 | IOI2 | sk_SK | sl_SI | sr_RS | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_Hans_CN | zh_MO | zh_TW
- Test data and supplementary materials
Robot Contest
- Authors: Hirotaka Yoneda , Masataka Yoneda (Japan)
- Official English
- Translations:
  ar_SY | az_AZ | bg_BG | bs_BA | cnr_ME | cs_CZ | de_AT | de_CH | de_DE | el_CY | el_GR | en | en_PS | en_TN | es_AR | es_BO | es_CL | es_CO | es_CU | es_DO | es_EC | es_ES | es_MX | es_PE | es_SV | es_VE | et_EE | fa_IR | fr_FR | he_IL | hr_HR | hu_HU | hy_AM | id_ID | is_IS | it_IT | ja_JP | ka_GE | kk_KZ | ko_KR | ky_KG | lt_LT | lv_LV | mk_MK | mn_MN | nl_NL | pl_PL | pt_BR | pt_PT | ro_MD | ro_RO | IOI1 | IOI2 | si_LK | sk_SK | sl_SI | sr_RS | th_TH | tr_TR | uk_UA | uz_UZ | vi_VN | zh_Hans_CN | zh_MO | zh_TW
- Test data and supplementary materials