{
    int @a,@b,@c;
    int m=min(a,b)*2,x=a-c/2,y=b-c/2;
    if(m<c||(m==c&&a==b)||(!c&&m))wt(-1);
    else if(!m){
        rep(a)wtN(0);
        rep(b)wtN(1);
    }else if(m==c){
        rep(i,c)wtN((i+(b>a))%2);
        rep(max(x,y))wtN(b>a);
    }else{
        rep(x)wtN(0);
        rep(i,1,c)wtN(i%2);
        rep(y)wtN(1);
        if(!(c%2))wtN(0);
    }
}