Submission #548302

#	Time	Username	Problem	Language	Result	Execution time	Memory
548302		Killer2501	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#define fi first
#define se second
#define pb push_back
#include "combo.h"
using namespace std;
using ll = long long;
using ld = long double;

const int N = 3e5 +2;
const int base = 31;
const int mod = 1e9 +7;
int a[4], k;
int press(string s)
{
    cout << s << endl;
    cin >> k;
    return k;
}
string guess_sequence(int n)
{
    string res;
    memset(a, 1, sizeof(a));
    for(int i = 1; i <= n; i ++)
    {
        string s;
        if(a[0])
        {
            k = press(res+"A");
            if(k == i)
            {
                res += "A";
                if(i == 1)a[0] = 0;
                continue;
            }

        }
        if(a[1])
        {
            k = press(res+"B");
            if(k == i)
            {
                res += "B";
                if(i == 1)a[1] = 0;
                continue;
            }

        }
        if(a[2])
        {
            k = press(res+"X");
            if(k == i)
            res += "Y";
            if(i == 1)a[3] = 0;
        }
    }
    return res;
}

Compilation message (stderr)

combo.cpp: In function 'int press(std::string)':
combo.cpp:15:5: error: 'cout' was not declared in this scope
   15 |     cout << s << endl;
      |     ^~~~
combo.cpp:5:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    4 | #include "combo.h"
  +++ |+#include <iostream>
    5 | using namespace std;
combo.cpp:15:18: error: 'endl' was not declared in this scope
   15 |     cout << s << endl;
      |                  ^~~~
combo.cpp:5:1: note: 'std::endl' is defined in header '<ostream>'; did you forget to '#include <ostream>'?
    4 | #include "combo.h"
  +++ |+#include <ostream>
    5 | using namespace std;
combo.cpp:16:5: error: 'cin' was not declared in this scope
   16 |     cin >> k;
      |     ^~~
combo.cpp:16:5: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:22:5: error: 'memset' was not declared in this scope
   22 |     memset(a, 1, sizeof(a));
      |     ^~~~~~
combo.cpp:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include "combo.h"
  +++ |+#include <cstring>
    5 | using namespace std;