View Compilation Error

0_0_39389789_28677.cpp:3:1: error: '::main' must return 'int'
    3 | void main()
      | ^~~~
0_0_39389789_28677.cpp: In function 'int main()':
0_0_39389789_28677.cpp:14:25: error: 'sn' was not declared in this scope; did you mean 'sm'?
   14 |                         sn = sm = 1;
      |                         ^~
      |                         sm