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Problems
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Problems

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Difficulty
Sort by
1397
Control Points
Very easy
1431
Train Security
Hard
1435
Matchbox
Medium
1442
One-dimensional Clickomania
Medium
1449
Sawtooth approximation
Very easy
1542
The ? 1 ? 2 ? ... ? n = k problem
Hard
1591
Shoemaker Problem
Very easy
1592
Bridge
Very easy
1594
Encoded Sum
Very easy
1596
Pancakes
Easy
1631
Let's Go to the Movies
Hard
1685
Lands of Antarctica
Medium
1697
How to become a winner
Very easy
1738
Filling with domino
Very easy
1818
Egyptian Fractions
Very easy
1825
Sensor network
Hard
1867
Cards
Easy
1873
Vertex Cover
Medium
1882
Curved Mirrors
Medium
1890
Breaking the leaderboard
Medium
1907
Trade
Hard
1911
Reform
Very hard
1918
Puzzle
Easy
1976
Programming is an art!
Very hard
2000
Minefield
Hard
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