/in/foo.cc: In function 'int main()':
/in/foo.cc:7:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     cin>>s+1;
          ~^~
/in/foo.cc:19:27: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if(a==s[13]-'0'||a==10&&s[13]=='X')
                      ~~~~~^~~~~~~~~~~~