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1995 Polish MO Finals
1
subsets with sum 2n+1
subsets with sum 2n+1
Source: Problem 1, Polish NO 1995
October 21, 2005
inequalities
combinatorics unsolved
combinatorics
Problem Statement
How many subsets of
{
1
,
2
,
.
.
.
,
2
n
}
\{1, 2, ... , 2n\}
{
1
,
2
,
...
,
2
n
}
do not contain two numbers with sum
2
n
+
1
2n+1
2
n
+
1
?
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