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Problems

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Difficulty
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409
Game
Medium
456
Game
Very hard
528
Space Telescope
Very easy
700
Exam
Hard
748
Ice Skating
Very hard
1195
Bicycle Puzzle
Easy
1197
Box Betting
Very easy
1202
Marble Madness
Easy
1203
Treasure in the Caves
Medium
1224
Cover Up
Hard
1316
Equal balls
Very easy
1317
Birthdays
Very easy
1318
Thick Coin
Very easy
1319
Duelists
1320
Forest
1321
Lucky Five
Very easy
1322
Matrix product
Medium
1323
Triangles in the polygon
Very easy
1432
Asteroid Field
Hard
1571
What is the probability?
Medium
1572
Coupons
1573
Cows and Cars
1574
Dice Throwing
Very easy
1575
God! Save me
Easy
1576
The Lost Gift
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