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Problems

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Difficulty
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1619
House Robber
Very easy
1620
Monk the Charles Greats
Easy
1621
The sum from 1 to n
Medium
1622
Orange barrels
Very easy
1623
Even and odd numbers
Very easy
1624
Day after tomorrow
Easy
1625
Judging Olympia
Easy
1626
Hide That Number
Very easy
1627
Rotating Rings
1628
A Tale from the Dark Side of the Moon
Easy
1629
Fermat`s Christmas Theorem
Very easy
1630
Incidental Points
Very easy
1631
Let`s Go to the Movies
1632
The Writer`s Club
Easy
1633
Moving Sticks
Very hard
1634
Johnny Hates Math
Easy
1635
Alien Visit
Very easy
1636
Big Number
Very hard
1638
Distance
Easy
1641
Golden Spire
Easy
1642
Hometask
Easy
1644
Joke
Medium
1645
Binary number
Easy
1647
Reset bits
Easy
1648
Fenwick Function
Easy
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