/in/foo.cc: In function 'int main()':
/in/foo.cc:17:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = t + 1, j = 0; i <= strlen(s); i++, j++)
                                ~~^~~~~~~~~~~~
/in/foo.cc:13:9: warning: unused variable 'm' [-Wunused-variable]
     int m = t + k;
         ^