View Compilation Error

0_0_38947112_2415.cpp: In function 'int main()':
0_0_38947112_2415.cpp:11:20: error: 'n' was not declared in this scope
   11 |                 if(n != m){
      |                    ^
0_0_38947112_2415.cpp:11:25: error: 'm' was not declared in this scope
   11 |                 if(n != m){
      |                         ^