/in/foo.cc: In function 'int main()':
/in/foo.cc:13:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(int i=0;i<t2;i++)
   ^~~
/in/foo.cc:20:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
    s--;
    ^
/in/foo.cc:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<=n.length()-1;i++)
              ~^~~~~~~~~~~~~~