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Problems

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Difficulty
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11532
Awkward situation
11533
Keech, Poch and the barn
11534
I'll never leave you
11535
Presents
11536
Conveyer
11537
Investigation
11538
Arithmetic progression
11539
Name generator
Medium
11540
Story
11541
Contest preparation
11542
Game of Thrones
11543
Competitive Programmers
11544
Boring tree queries
11545
Another easy string problem
11546
From XOR with love
11547
Hard choice
11548
Determinant of boolean matrix
11549
Trapping Rain Water
11550
x1+...+xk = n
11551
x1+...+xk = n (2)
11552
Arrange
11553
Binary Deque
11554
Catch the Plane
11563
Uncrossed Knight’s Tour
11566
The Cost of Speed Limits
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