Submission #685550

#	Time	Username	Problem	Language	Result	Execution time	Memory
685550		Bliznetc	Combo (IOI18_combo)	C++17	100 / 100	42 ms	544 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

using namespace std;


string guess_sequence (int N) {
    int n = N;
    vector<string> a = {"A", "B", "X", "Y"};
    string ans = "";

    int cur = press(a[0] + a[1]);
    if (cur) {
        cur = press(a[0]);
        if (cur) {
            ans += a[0];
            swap(a[0], a[3]);
        }
        else {
            ans += a[1];
            swap(a[1], a[3]);
        }
    }
    else {
        cur = press(a[2]);
        if (cur) {
            ans += a[2];
            swap(a[2], a[3]);
        }
        else {
            ans += a[3];
        }
    }

    for (int i = 2; i < n; i++) {
        cur = press(ans + a[0] + ans + a[1] + a[0] + ans + a[1] + a[1] + ans + a[1] + a[2]);
        if (cur == i) {
            ans += a[0];
        } else {
            if (cur == i + 1) {
                ans += a[1];
            }
            else {
                ans += a[2];
            }
        }
    }

    if (n == 1) {
        return ans;
    }
    
    cur = press(ans + a[0] + ans + a[1]);
    if (cur == n) {
        cur = press(ans + a[0]);
        if (cur == n) {
            ans += a[0];
        }
        else {
            ans += a[1];
        }
    }
    else {
        ans += a[2];
    }
    return ans;
}

//void solve(){
//
//}
//
//signed main() {
//    ios_base::sync_with_stdio(false);
//    cin.tie(0); cout.tie(0);
//    int t = 1;
//    cin >> t;
//    while (t--) {
//        solve();
//        cout << "\n";
//    }
//}

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95