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Problems

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Difficulty
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1963
Theater
Very easy
1964
What is left?
Medium
1965
Line
Very easy
1966
A big plus
1967
Winnie the Pooh
Easy
1968
Balls
Easy
1969
Sphere
Very hard
1970
David Copperfield is resting
Very easy
1971
Fateful Chess Puzzle
Very easy
1972
Splitting
Medium
1973
Rollback
Very easy
1974
Random Acts of Kindness Day
Very easy
1975
The tightly bound son of the mountains
Hard
1976
Programming is an art!
Very hard
1977
Well, a very common method for graphs...
Easy
1978
Organizational Problems: A Topic for a Dissertation?
Easy
1979
Railroad
1980
Eustace-Alex
Very easy
1981
Mushroom
Very easy
1982
Highways
Medium
1983
Ricefield
Very easy
1984
Fractions
Easy
1985
Primes Masha
Medium
1986
Masha and the palindrome
Medium
1987
The Next Permutation
Very easy
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