/in/foo.cc: In function 'int main()':
/in/foo.cc:12:76: error: expected ';' before ')' token
    cout<<(s[0]+s[2]*2+s[3]*3+s[4]*4+s[6]*5+s[7]*6+s[8]*7+s[9]*8+s[10]*9)%11);
                                                                            ^