/in/foo.cc: In function 'std::__cxx11::string solve()':
/in/foo.cc:38:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (jm2(s) == s2 && jm3(s) == s3 || jm2(s) == s3 && jm3(s) == s2) return s;
       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~
/in/foo.cc:40:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (jm2(s) == s1 && jm3(s) == s3 || jm2(s) == s3 && jm3(s) == s1) return s;
       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~
/in/foo.cc:42:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (jm2(s) == s1 && jm3(s) == s2 || jm2(s) == s2 && jm3(s) == s1) return s;
       ~~~~~~~~~~~~~^~~~~~~~~~~~~~~
/in/foo.cc:44:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^