#include <iostream>

using namespace std;

int ls,ld,cs,cd,val,c,l,nrm,nrM;
int main()
{
        ls=1;ld=200;
        cs=1;cd=200;
        while(ls<=ld)
        {
            int l=(ls+ld)/2;
            nrm=0;
            nrM=0;
            while(cs<=cd)
            {
                int c=(cs+cd)/2;
                cout<<l<<" "<<c;
                cout.flush();
                cin>>val;
                if(val == 0) {return 0;}
                if(val > 0) {cd=c-1;++nrM;}
                    else {cs = c+1;++nrm;}
            }
            if(nrM > nrm) ld=l-1;
                else ls=l+1;
        }
    return 0;
}