Submission #321031

#	Time	Username	Problem	Language	Result	Execution time	Memory
321031		gustason	Combo (IOI18_combo)	C++14	0 / 100	1 ms	200 KiB

combo

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

using namespace std;

string guess_sequence(int N) {
    string keys[] = {"A", "B", "X", "Y"};
    string S = "";
    if (press("AB") == 1) {
        if (press("A") == 1) {
            S += 'A';
        } else {
            S += 'B';
        }
    } else {
        if (press("X") == 1) {
            S += 'X';
        } else {
            S += 'Y';
        }
    }
    vector<string> add;
    if (S == "B") {
        add.push_back("X");
    } else {
        add.push_back("B");
    }

    string fr;
    if (S == "X") {
        fr += "B";
    } else {
        fr += "X";
    }

    vector<string> keys2;
    for(int i = 0; i < 4; i++) {
        if (keys[i] == S) continue;
        keys2.push_back(keys[i]);
        add.push_back(fr + keys[i]);
    }

    int sz = 1;
    for(int i = 1; i < N-1; i++, sz++) {
        int p = press(S + add[0] + S + add[1] + S + add[2] + S + add[3]);
        if (p == sz) {
            S += add[3][1];
        } else if (p == sz + 1) {
            S += add[0][0];
        } else {
            S += add[1][0];
        }
    }

    if (press(S + keys[0] + S + keys[1]) == sz) {
        S += keys[2];
    } else {
        if (press(S + keys[0]) == sz + 1) {
            S += keys[0];
        } else {
            S += keys[1];
        }
    }
    return S;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95