#include <bits/stdc++.h>
using namespace std;

#define ll long long int
#define pb push_back
#define mp make_pair
#define F first
#define S second

int main()
{
    //ios_base::sync_with_stdio(0); cin.tie(0);

    int L=0,R=1000000,ans;
    while(L<=R){
        int m=(L+R)/2;
        cout<<m<<endl;

        string resp; cin>>resp;
        if(resp=="<")   R=m-1;
        else{
            ans=m;
            L=m+1;
        }
    }
    cout<<"! "<<ans<<endl;
    return 0;
}