Problems from VNSC 2nd National Science Festival Programming Contest

These problems are from a contest hosted on February 24, 2018 at 1:00 PM UTC. See details...

Standings
A. Rock,Paper, Scissor
Gon and Killua is playing rock,paper,scissor game. Now they are bored with the traditional rules. So...
B. Gintama again!
There are N+1 cities in the GINLAND country. Each city is numbered 0 to N. One day Gintoki have lost...
C. Sheldon's Spot
We all know Sheldon doesn't like other people to touch his Special seat. He calls it his "spot". One...
D. Farhan's Law
One day Farhan was playing with numbers. He discovered that multiplication of G.C.D(Greatest Common ...
E. Arnab in the Triangle Land
Arnab, the genius CR of BUET CSE-14, has decided to visit the mysterious land of triangles. But to e...
F. Give Me A O(1) Solution !!!
Meem is given an array of N integers and an integer k. She has to tell the number of both distinct a...
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