The task statements of IOI 2018 are available in this page.

Practice Session

• Implementation Notice
  • Official English
• Bubble Sort 2
  • Official English
  • Review
  • Test data and supplementary materials (124 MB)
• Road Service (Output-only Task)
  • Official English
  • Input data and sample outputs
• Timecard
  • Official English
  • Test data and supplementary materials
• Xylophone
  • Official English
  • Review
  • Test data and supplementary materials

Contest 1

• Implementation Notice
  • Official English
  • Translations:
    ARG, ARM, AUT, BEL, BGD, BGR, BIH, BOL, BRA, CHE, CHL, CHN, COL, CUB, CYP, CZE, DEU, DOM, EST, FIN, FRA, GEO, GRC, HRV, HUN, IDN, IRN, ITA, JPN, KGZ, KOR, LTU, LUX, LVA, MAC, MAR, MDA, MEX, MKD, MNE, MNG, NLD, NOR, POL, PRT, ROU, RUS, SLV, SRB, SVK, SVN, SYR, THA, TKM, TUN, TUR, TWN, UKR, UZB, VEN, VNM, ZAF
• Combo
  • Author: Ammar Fathin Sabili (Indonesia)
  • Official English
  • Translations:
    ARG, ARM, AUT, AZE, BEL, BGD, BGR, BIH, BOL, BRA, CAN, CHE, CHL, CHN, COL, CUB, CYP, CZE, DEU, DNK, DOM, EGY, EST, FRA, GEO, GRC, HRV, HUN, IDN, IND, IRN, ISR, ITA, JPN, KAZ, KGZ, KOR, LTU, LUX, LVA, MAC, MAR, MDA, MEX, MKD, MNE, MNG, NLD, NOR, POL, PRT, ROU, RUS, SLV, SRB, SVK, SVN, SYR, THA, TKM, TUN, TUR, TWN, UKR, UZB, VEN, VNM, ZAF
  • Review
  • Test data and supplementary materials
• Seats
  • Author: Mikhail Pyaderkin (Russia)
  • Official English
  • Translations:
    ARG, ARM, AUT, AZE, BEL, BGR, BIH, BOL, BRA, CHE, CHL, CHN, COL, CUB, CYP, CZE, DEU, DOM, EGY, EST, FRA, GEO, GRC, HRV, HUN, IDN, IRN, ISR, ITA, JPN, KGZ, KOR, LTU, LUX, LVA, MAC, MAR, MDA, MEX, MKD, MNE, MNG, NLD, NOR, POL, PRT, ROU, RUS, SLV, SRB, SVK, SVN, SYR, THA, TKM, TUN, TUR, TWN, UKR, UZB, VEN, VNM, ZAF,
  • Review
  • Test data and supplementary materials (93 MB)
• Werewolf
  • Author: Mohammad Roghani (Iran), Helia Ziaei (Iran)
  • Official English
  • Translations:
    ARG, ARM, AUT, BGD, BGR, BIH, BOL, BRA, CHE, CHL, CHN, COL, CUB, CYP, CZE, DEU, DNK, DOM, EST, FIN, FRA, GEO, GRC, HRV, HUN, IDN, IRN, ISR, ITA, JPN, KGZ, KOR, LTU, LUX, LVA, MAC, MAR, MDA, MEX, MKD, MNE, MNG, NLD, POL, PRT, ROU, RUS, SLV, SRB, SVK, SVN, SYR, THA, TUN, TUR, TWN, UKR, UZB, VEN, VNM, ZAF
  • Review
  • Test data and supplementary materials (124 MB)

All tasks for Contest 1 are published under the Creative Commons Attribution (CC-BY) License.

Contest 2

• Implementation Notice
  • Official English
  • Translations:
    ARG, ARM, AUT, AZE, BGR, BIH, BOL, BRA, CHE, CHL, CHN, COL, CUB, CYP, CZE, DEU, DOM, EST, FRA, GEO, GRC, HRV, IDN, IRL, IRN, ITA, JPN, KOR, LTU, LUX, LVA, MAC, MAR, MDA, MEX, MKD, MNE, MNG, MYS, NLD, NZL, POL, PRT, ROU, RUS, SLV, SRB, SVK, SVN, THA, TUN, TUR, TWN, UKR, UZB, VEN, VNM
• Mechanical Doll
  • Author: Tomasz Idziaszek (Poland)
  • Official English
  • Translations:
    ARG, ARM, AUT, AZE, BGR, BIH, BOL, BRA, CHE, CHL, CHN, COL, CUB, CYP, CZE, DEU, DNK, DOM, EST, FRA, GEO, GRC, HRV, HUN, IDN, IRL, IRN, ISR, ITA, JPN, KGZ, KOR, LTU, LUX, LVA, MAC, MAR, MDA, MEX, MKD, MNE, MNG, MYS, NLD, NZL, POL, PRT, ROU, RUS, SLV, SRB, SVK, SVN, SYR, THA, TUN, TUR, TWN, UKR, UZB, VEN, VNM, ZAF
  • Review
  • Test data and supplementary materials
• Highway Tolls
  • Author: Shogo Murai (Japan)
  • Official English
  • Translations:
    ARG, ARM, AUT, AZE, BGR, BIH, BOL, BRA, CHE, CHL, CHN, COL, CUB, CYP, CZE, DEU, DOM, EST, FRA, GEO, GRC, HKG, HRV, HUN, IDN, IRN, ISR, ITA, JPN, KGZ, KOR, LTU, LUX, LVA, MAC, MAR, MDA, MEX, MKD, MNE, MNG, NLD, NZL, POL, PRT, ROU, RUS, SLV, SRB, SVK, SVN, SYR, THA, TUN, TUR, TWN, UKR, UZB, VEN, VNM
  • Review
  • Test data and supplementary materials (53 MB)
• Meetings
  • Author: Riku Kawasaki (Japan)
  • Official English
  • Translations:
    ARG, ARM, AUT, AZE, BGR, BIH, BOL, BRA, CHE, CHL, CHN, COL, CUB, CYP, CZE, DEU, DOM, EST, FRA, GEO, GRC, HRV, HUN, IDN, IRN, ISR, ITA, JPN, KGZ, KOR, LTU, LUX, LVA, MAC, MAR, MDA, MEX, MKD, MNE, MNG, NLD, NZL, POL, PRT, ROU, RUS, SLV, SRB, SVK, SVN, SYR, THA, TUN, TUR, TWN, UKR, UZB, VEN, VNM
  • Review
  • Test data and supplementary materials (163 MB)

All tasks for Contest 2 are published under the Creative Commons Attribution (CC-BY) License.

List of Authors

The list of authors who have submitted tasks to IOI 2018:

Victor Ciuntu
Posdarascu Eugenie Daniel
Mircea Dima
Michal Forišek
Agustín Santiago Gutiérrez
Ta-Jui Ho
Yi Feng Huang
Mohammad Ishraq Huda
Tomasz Idziaszek
Aleksandar Ilic
Javier Eduardo Ojeda Jorge
Riku Kawasaki
Katarzyna Kowalska
Soh Kumabe
Antti Laaksonen
Jakub Łącki
Victor Lecomte
Yi Kuan Li
Krzysztof Maziarz
Shogo Murai
Danylo Mysak
Oleg Oshmyan
Karol Pokorski
Mikhail Pyaderkin
Mohammad Roghani
Ammar Fathin Sabili
Jakub Safin
Saeed Seddighin
Mohammad Mahdi Shokri
Monika Steinova
Michal Svagerka
Kevin Tran
Shi-Chun Tsai
David Venhoek
Bang Ye Wu