Submission #713060

#	Time	Username	Problem	Language	Result	Execution time	Memory
713060		tht2005	Combo (IOI18_combo)	C++17	30 / 100	89 ms	552 KiB

combo

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

using namespace std;

const string BUTTONS = "ABXY";

string tmp[4];
int solve(int l, int r) {
    if(l == r) {
        return l;
    }
    int m = (l + r) >> 1;
    string combo;
    for(int i = l; i <= m; ++i) {
        for(char ch : tmp[i]) {
            combo.push_back(ch);
        }
    }
    if(press(combo) >= (int)tmp[0].size()) {
        return solve(l, m);
    }
    return solve(m + 1, r);
}

string guess_sequence(int N) {
    string res;
    for(int i = 1; i <= N; ++i) {
        for(int j = 0; j < 4; ++j) {
            tmp[j] = res;
            tmp[j].push_back(BUTTONS[j]);
        }
        res.push_back(BUTTONS[solve(0, 3)]);
    }
    return res;
}

• Subtask 1: 5 / 5
• Subtask 2: 25 / 95