#include 
#include 
using namespace std;

//DON'T EDIT THIS FUNCTION, AS IT'S HERE TO SUPPORT
//THE COMMUNICATION WITH THE INTERACTIVE GRADER
int count(string expression) {
    cout << expression << endl;
    
    int matchingRecords;
    cin >> matchingRecords;
    return matchingRecords;
}


//YOUR SOLUTION STARTS HERE
string my_to_string(long long x) {
    string res = "";
    while(x > 0) {
        res += ((x % 10) + '0');
        x /= 10;
    }
    reverse(res.begin(), res.end());
    return res;
}
int findMoney(int N) {
    long long L = 0;
    long long R = 2000000000;
    
    while(L <= R) {
        long long middle = (L + R) / 2;
        string is_less = "name != bidik || name == bidik && money < ";
        is_less += my_to_string(middle);
        
        string is_equal = "name != bidik || name == bidik && money == ";
        is_equal += my_to_string(middle);
        
        int less = count(is_less);
        int equal = count(is_equal);
        
        if(equal == N) {
            return middle;
        }
        if(less == N) {
            R = middle;
        }
        else {
            L = middle + 1;
        }
        
    }
    //make sure this function returns the money donated
    return 0;
}

int main(){
    int n;
    cin >> n;
    
    cout << findMoney(n) << endl;
    return 0;
}