0_0_29476022_6804.cpp:1:1: error: expected unqualified-id before 'or' token
or(int i = 2;i <= 500001/2;i++)//因子范围从2到250000
^
0_0_29476022_6804.cpp:1:14: error: 'i' does not name a type
or(int i = 2;i <= 500001/2;i++)//因子范围从2到250000
^
0_0_29476022_6804.cpp:1:28: error: 'i' does not name a type
or(int i = 2;i <= 500001/2;i++)//因子范围从2到250000
^
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