/in/foo.cc: In function 'int main()':
/in/foo.cc:44:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(m=1;m<=n+1;m<<=1);mx[m]=mx[m+n+1]=mx[(m+n+1)^1]-1e18;
  ^~~
/in/foo.cc:44:24: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  for(m=1;m<=n+1;m<<=1);mx[m]=mx[m+n+1]=mx[(m+n+1)^1]-1e18;
                        ^~