View Compilation Error

0_0_21095758_26569.cpp:5:6: error: expected nested-name-specifier before '?' token
 using?namespace?std;??
      ^
0_0_21095758_26569.cpp:5:21: error: expected unqualified-id before '?' token
 using?namespace?std;??
                     ^
0_0_21095758_26569.cpp:7:17: error: expected unqualified-id before '?' token
 int?a[105][105];??
                 ^