Submission #1071694

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071694		Rigobertus	Combo (IOI18_combo)	C++17	10 / 100	47 ms	1100 KiB

combo

#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <string>
//#define int long long
#include "combo.h"
using namespace std;

string guess_sequence(int n) {
    string c[4] = {"A", "B", "X", "Y"};
    string s = "";
    bool vis[4];
    for (int i = 0; i < 4; i++) {
        vis[i] = 0;
    }
    int j;
    for (int i = 0; i < 4; i++) {
        if (press(c[i])) {
            s = c[i];
            j = i;
            break;
        }
    }
    while (int(s.size()) < n) {
        for (int i = 0; i < 4; i++) {
            if (i == j || vis[i]) {
                vis[i] = 0;
                continue;
            }
            string p = s + c[i] + c[i];
            if (press(p) == int(p.size())) {
                s = p;
                break;
            }
            else if (press(p) == int(p.size()) - 1) {
                s += c[i];
                vis[i] = 1;
                break;
            }
        }
    }
    return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:29:13: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   29 |             if (i == j || vis[i]) {
      |             ^~

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