/in/foo.cc: In function 'int main()':
/in/foo.cc:71:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0, j = 0; i < s.length(); i++) {
                            ~~^~~~~~~~~~~~
/in/foo.cc:95:22: warning: right operand of comma operator has no effect [-Wunused-value]
     delete[] h0, m0, h1, m1;
                      ^~
/in/foo.cc:95:26: warning: right operand of comma operator has no effect [-Wunused-value]
     delete[] h0, m0, h1, m1;
                          ^~
/in/foo.cc:95:28: warning: right operand of comma operator has no effect [-Wunused-value]
     delete[] h0, m0, h1, m1;
                            ^