View Compilation Error

0_0_19830750_4045.cpp:38:9: error: stray '#' in program
         int all = (1<<m)-1;
         ^
0_0_19830750_4045.cpp: In function 'int main()':
0_0_19830750_4045.cpp:38:10: error: lvalue required as unary '&' operand
         int all = (1<<m)-1;
          ^