View Compilation Error

0_0_20800002_29091.cpp:53:5: error: stray '\243' in program
     while (scanf("%d%d", &n, &m) ！= EOF) {
     ^
0_0_20800002_29091.cpp:53:5: error: stray '\241' in program
0_0_20800002_29091.cpp: In function 'int main()':
0_0_20800002_29091.cpp:53:36: error: lvalue required as left operand of assignment
     while (scanf("%d%d", &n, &m) ！= EOF) {
                                    ^