The task statements of IOI 2021 are available on this page.
All tasks are published under the Creative Commons Attribution (CC-BY) License.

Practice Contest

• Notice (Official English)
• Gift (Official English)
  • Test data and supplementary materials
• Jelly (Official English)
  • Test data and supplementary materials
• Routers (Official English)
  • Test data and supplementary materials
• Robot (Official English)
  • Test data and supplementary materials

The ranking for the Practice Contest can be found at https://practice.ranking.ioi2021.sg.

 

Contest Day 1

• Notice (Official English)
  • Translated notice statements
• Candies (Official English)
  • Author: Nguyen Vu Hoang Vuong
  • Translated task statements
  • Test data and supplementary materials
• Keys (Official English)
  • Author: Tadija Šebez
  • Translated task statements
  • Test data and supplementary materials
• Parks (Official English)
  • Author: Pavle Martinović
  • Translated task statements
  • Test data and supplementary materials

 

Contest Day 2

• Notice (Official English)
  • Translated notice statements
• DNA (Official English)
  • Author: Agustín Santiago Gutiérrez,
  • Translated task statements
  • Test data and supplementary materials
• Dungeons (Official English)
  • Author: Ta-Jui Ho (Darryl)
  • Translated task statements
  • Test data and supplementary materials
• Registers (Official English)
  • Author: Maxim Akhmedov
  • Translated task statements
  • Test data and supplementary materials

 

The official ranking for IOI 2021 can be found at https://ranking.ioi2021.sg/.