View Compilation Error

0_0_36632539_16234.cpp:1:1: error: 'Avin' does not name a type
 Avin is studying series. A series is called "wave" if the following conditions are satisfied:
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0_0_36632539_16234.cpp:3:1: error: expected unqualified-id before numeric constant
 2) All elements at odd positions are the same;
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0_0_36632539_16234.cpp:4:1: error: expected unqualified-id before numeric constant
 3) All elements at even positions are the same;
 ^
0_0_36632539_16234.cpp:5:1: error: expected unqualified-id before numeric constant
 4) Elements at odd positions are NOT the same as the elements at even positions.
 ^