View Compilation Error

0_0_25391113_540.cpp:68:5: error: redefinition of 'int n'
 int n;
     ^
0_0_25391113_540.cpp:7:5: note: 'int n' previously declared here
 int n,m;
     ^
0_0_25391113_540.cpp: In function 'int main()':
0_0_25391113_540.cpp:103:5: error: redefinition of 'int main()'
 int main(){
     ^
0_0_25391113_540.cpp:40:5: note: 'int main()' previously defined here
 int main()
     ^