View Compilation Error

0_0_39487478_19912.cpp:24:1: error: expected unqualified-id before '=' token
   24 | =
      | ^
0_0_39487478_19912.cpp: In function 'int main()':
0_0_39487478_19912.cpp:48:17: error: 'n' was not declared in this scope
   48 |                 n=read(); m=read();
      |                 ^
0_0_39487478_19912.cpp:48:27: error: 'm' was not declared in this scope
   48 |                 n=read(); m=read();
      |                           ^