/in/foo.cc: In function 'int LCA(int, int)':
/in/foo.cc:53:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=20;i>=0;i--)
  ^~~
/in/foo.cc:58:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   if(x==y) return x;
   ^~