View Compilation Error

0_0_19395472_3689.cpp:8:8: error: macro names must be identifiers
 #define?maxn?2000??
        ^
0_0_19395472_3689.cpp:9:8: error: macro names must be identifiers
 #define?INF?0xfffffff??
        ^
0_0_19395472_3689.cpp:10:8: error: macro names must be identifiers
 #define?MS(a,b)?memset(a,b,sizeof(a));??
        ^
0_0_19395472_3689.cpp:120:1: error: stray '\' in program
 ?????return?0;??////
 ^
0_0_19395472_3689.cpp:5:6: error: expected nested-name-specifier before '?' token
 using?namespace?std;??
      ^
0_0_19395472_3689.cpp:5:21: error: expected unqualified-id before '?' token
 using?namespace?std;??
                     ^