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Problems

Implementation
Difficulty
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1427
Calculator
1428
Students
Very easy
1429
Comparison of Numbers
Very easy
1430
Dad is strong...
Very easy
1437
The code of the lock
Very easy
1438
Upside Down Clock
1443
Snake
Easy
1449
Sawtooth approximation
Very easy
1458
Football
Very easy
1459
Revision
1460
Double reverse
1463
At the intersection
Very easy
1465
Navid The Judge
Very hard
1472
Dungeon Master II
Easy
1473
Store
Very easy
1474
Broken Clock
Very easy
1475
Unbirthdays
Very easy
1490
Moon
Easy
1493
Robot
Medium
1496
Water
Hard
1512
Farey sequences
1545
Can You Solve It?
Very easy
1546
Ants
Very easy
1548
Diagonal
Very easy
1562
Modular Equations
Very easy
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