View Compilation Error

0_0_32027684_1967.cpp: In function 'int main()':
0_0_32027684_1967.cpp:27:54: error: expected ')' at end of input
  while (scanf ("%d %d", &n, &m) != EOF && n != -1 && m
                                                      ^
0_0_32027684_1967.cpp:27:54: error: expected statement at end of input
0_0_32027684_1967.cpp:27:54: error: expected '}' at end of input