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Problems
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Difficulty
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5989
Hippodrome
Very hard
5992
The Riemann Hypothesis
Easy
6004
Symbolic Mathematics
Medium
6005
Gray Code
Very easy
6008
Inverse triangular numbers
Easy
6012
Time Limit Exceeded
Easy
6034
No Trees But Flowers
Very easy
6039
Timing
Very hard
6040
Triangles
Hard
6050
Laser Shot
Hard
6059
Sum of Odd Sequence
Very easy
6067
Sum of Powers Version I
Very easy
6081
"Metro"
Easy
6088
Sum
Very easy
6100
Control Block
Very easy
6138
Square root
Easy
6149
Casino
Medium
6155
Wrong monks
Very easy
6156
Hanoi Towers - Reloaded
Very easy
6158
The Major-Domo's Brain-Buster
Hard
6162
Fox Observation
Hard
6174
A+B
Medium
6179
An Idea of Mr. A
Very easy
6190
Number Game
Very easy
6191
Evil & Odious
Very easy
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