/in/foo.cc: In function 'int main()':
/in/foo.cc:13:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=1;i<=n;i++)
  ^~~
/in/foo.cc:19:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   cout<<ans;
   ^~~~
/in/foo.cc:8:10: warning: unused variable 'x' [-Wunused-variable]
  int n,m,x,ans=0;
          ^