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· inv-3
Invariants & Monovariants · Parity
Olympiad classic
●●●●○ 7/10
~5 min
⏱ 0:00
Signs
+
+
+
or
−
-
−
are placed between the numbers
1
,
2
,
…
,
10
1, 2, \ldots, 10
1
,
2
,
…
,
10
. What is the smallest nonnegative value the resulting expression can take?
parity
signed-sums
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Hint 1 of 3
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