View Compilation Error

0_0_28586388_21489.cpp: In function 'int Nim_Multi_Power(int, int)':
0_0_28586388_21489.cpp:8:28: error: expected primary-expression before ')' token
       if(x<(1<<(1<<(a+1)))))
                            ^
0_0_28586388_21489.cpp: In function 'int Nim_Multi(int, int)':
0_0_28586388_21489.cpp:20:28: error: expected primary-expression before ')' token
       if(x<(1<<(1<<(a+1)))))
                            ^