Login english/ français















Please select a problem.

Welcome contest 2009
Problem AMultilingual Switzerland3 users
Problem BSwiss Travel Agency1 user
Problem CThe Country of the Banks5 users
Problem DClocks made in Switzerland2 users
Problem EChâteau-d'Oex Balloon Festival2 users
Problem FFrom Schaffhausen to Geneva by Boat2 users
Yet another Bangladeshi Contest (external, TEST)
Problem HKnight Tour1 user
Regional Warmup 1 (external, TEST)
Problem ALogarithms2 users
Problem BIncome Tax Hazard (II)0 users
Problem CHow Many Teams?1 user
Problem DNon-Decreasing Prime Sequence0 users
Problem EPhysics Experiment0 users
Problem FSign of a Matrix0 users
Problem GDynamic Summation0 users
Problem HEnemy at the Gateway0 users
Problem IIn-Ellipse0 users
Problem JHappy Friends0 users
Brazilian National Contest (external)
Problem ADeadly Attack0 users
Problem BAlarm clock3 users
Problem CCards' Exchange2 users
Problem DSub-prime2 users
Problem EDragster1 user
Problem FTower for Cellular Telephony2 users
Problem GShift Register0 users
Problem HLaser Sculpture2 users
Warm-up contest
Problem APirates of the Caribbean5 users
Problem BRatatouille2 users
Problem CHarry Potter3 users
Problem DThe Matrix3 users
Problem EIce Age5 users
Problem FThe Rock3 users
Nordic Collegiate Programming Contest
Problem ASoda Surpler4 users
Problem BMoney Matters4 users
Problem CAllergy Test3 users
Problem DRain Fall3 users
Problem ESpeedy Escape2 users
Problem FGokigen Naname2 users
Problem GFlight Planning1 user
Problem HBeacons1 user
Problem IPlayfair cipher3 users
Problem JCode permutations0 users
1st Team Contest
Problem 0Chest of Drawers5 users
Problem 1Clever Naming Patterns4 users
Problem 2Flying to Fredericton4 users
Problem 3Enumerating Rational Numbers3 users
Problem 4Bey Battle3 users
Problem 5Seven Seas2 users
Problem 6Another Lottery4 users
Problem 7Andy's Shoes6 users
Problem 8Cool Points4 users
Problem 9Tautology4 users
Selection Contest 2009
Problem AGoal for Raúl2 users
Problem BMadrids One Way Streets2 users
Problem CLost in Madrid2 users
Problem DLibrary for Madrid0 users
Problem ESpanish Conjugation4 users
Problem FContest Dinner2 users
Problem GCrazy Receptionist1 user
Problem HDecode the Castanets1 user
Problem IGuernica3 users
Problem JStreet Gambler1 user
World Finals - Stockholm - 2008/2009
Problem AA Careful Approach2 users
Problem BMy Bad2 users
Problem CThe Return of Carl0 users
Problem DConduit Packing1 user
Problem EFare and Balanced1 user
Problem FDeer-Proof Fence2 users
Problem GHouse of Cards0 users
Problem HThe Ministers' Major Mess0 users
Problem IStruts and Springs0 users
Problem JSubway Timing0 users
Problem KSuffix-Replacement Grammars1 user
SWERC 2009
Problem ATrick or Treat1 user
Problem BWorking at the Restaurant1 user
Problem CLights0 users
Problem DDarts0 users
Problem EGenetics0 users
Problem FHaunted Graveyard0 users
Problem GSlalom0 users
Problem HRouting0 users
Problem IHappy Telephones1 user
Problem JStammering Aliens0 users
Pancakes
Problem 1Pancake Tower1 user
HC2 - 2010
Problem AAlways there for you3 users
Problem BBook of secret stories1 user
Problem CCarving around the marmots2 users
Problem DDelivery2 users
Problem EExploring Switzerland2 users
Problem FFinest Selection2 users
Problem GGood pictures2 users
Problem HHeidi @ HC22 users
Problem IIce pyramids2 users
Welcome contest 2010
Problem AMessy Administration1 user
Problem BJust on time2 users
Problem CDelicious Pancakes3 users
Selection Contest 2010
Problem AElectrical Engineering1 user
Problem BBiology1 user
Problem CEnvironmental Engineering1 user
Problem DTelecommunications1 user
Problem EMathematics1 user
Problem FArchitecture1 user
Problem GChemistry2 users
Problem HCivil Engineering1 user
HC2 - 2011
Problem AInto the blue0 users
Problem BTerra Icognita0 users
Problem CCow-otic Drive through Manhattan0 users
Problem DMismanaged secrets0 users
Problem EMassively Multiplayer Shoot-em-up0 users
Problem FBoomerang0 users
Problem GThe souvenir0 users
Problem HHome again0 users