View Compilation Error

0_0_14805405_29271.c:6:9: error: unknown type name '_int128'
 typedef _int128 lint ;
         ^
0_0_14805405_29271.c: In function 'main':
0_0_14805405_29271.c:53:1: error: expected expression before '/' token
 // freopen( "input.txt" , "r" , stdin ) ;
 ^