cpp/1_Guess_the_Number.cpp at main · Sayemahamed/cpp · GitHub

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#include <bits/stdc++.h>
using namespace std;
//----------------------------------------------------------------//
// definitions //
#define all(x)  x.begin(), x.end()
#define rall(x)  x.rbegin(), x.rend()
// #define endl '\n'
//----------------------------------------------------------------//
// preDefined functions//

//----------------------------------------------------------------//
//data types//

//----------------------------------------------------------------//
// helper functions //


//----------------------------------------------------------------//
// solve function//
void solve() {
    unsigned long long high = 1000000, low = 0, mid;
    while (high - low > 0) {
        mid = (high + low + 1) >> 1;
        cout << mid << endl;
        string str;
        cin >> str;
        if (str == ">=")low = mid;
        else high = mid-1;
    }
    cout << "! " << low << endl;
}

//----------------------------------------------------------------//
// main function//
int main() {
    ios_base::sync_with_stdio( false );
    cin.tie( NULL );
    cout.tie( NULL );
    long long test = 1;
    // cin >> test;
    while (test--) {
        solve();
    }
}