Submission #86931

#	Time	Username	Problem	Language	Result	Execution time	Memory
86931		tjdgus4384	Combo (IOI18_combo)	C++14	10 / 100	102 ms	432 KiB

combo

#include<cstdio>
#include "combo.h"
#include<string>
using namespace std;
string x[4] = {"A", "B", "X", "Y"};
 
string guess_sequence(int n)
{
    string p;
    int f, a;
    for(int i = 0;i < 4;i++)
    {
        a = press(x[i]);
        if(a == 1) f = i;
    }
    p = x[f];
    for(int i = 1;i < n;i++)
    {
        for(int j = 0;j < 4;j++)
        {
            if(j == f) continue;
            string q = p + x[j];
            a = press(q);
            if(a == i + 1)
            {
                p += x[j];
                break;
            }
        }
    }
    return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:21:13: warning: 'f' may be used uninitialized in this function [-Wmaybe-uninitialized]
   21 |             if(j == f) continue;
      |             ^~

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