cf/mirror

Virtual contest · solo

Codeforces Round 640 (Div. 4)

7 problems · duration 2:00:00

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Hit Start contest to begin the countdown. Problems below open in a new tab when you click them — close the tab when you're finished with a problem. Click next to a problem when you AC'd it on cf-mirror or CF.

IdxNameRatingStatus
ASum of Round Numbers800
BSame Parity Summands1200
CK-th Not Divisible by n1200
DAlice, Bob and Candies1300
ESpecial Elements1500
FBinary String Reconstruction1500
GSpecial Permutation1600