View Compilation Error

0_0_21618562_12265.cpp:23:9: error: stray '\243' in program
         b>>=1；
         ^
0_0_21618562_12265.cpp:23:9: error: stray '\273' in program
0_0_21618562_12265.cpp: In function 'long long int q_pow(long long int, long long int, long long int)':
0_0_21618562_12265.cpp:24:9: error: expected ';' before 'a'
         a = (a*a)%m;
         ^