View Compilation Error

0_0_39722691_2320.cpp:18:11: error: redefinition of 'long long int n'
   18 | long long n,m;
      |           ^
0_0_39722691_2320.cpp:4:11: note: 'long long int n' previously declared here
    4 | long long n,m;
      |           ^
0_0_39722691_2320.cpp:18:13: error: redefinition of 'long long int m'
   18 | long long n,m;
      |             ^
0_0_39722691_2320.cpp:4:13: note: 'long long int m' previously declared here
    4 | long long n,m;
      |             ^
0_0_39722691_2320.cpp:20:5: error: redefinition of 'int main()'
   20 | int main()
      |     ^~~~
0_0_39722691_2320.cpp:6:5: note: 'int main()' previously defined here
    6 | int main()
      |     ^~~~