Submission #1283891

#	Time	Username	Problem	Language	Result	Execution time	Memory
1283891		hoangnoobpro	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include<bits/stdc++.h>
using namespace std;
#define mod 1000000007
#define nmax 1000007
#define fi first
#define se second
#define ll int
ll t=1,n,m,i,j,d=0,x=0,k=0,y,z,a[nmax],f[nmax];
string S,s1;
vector<char>v;
char t1,t2,t3,t4;
string guess_sequence(int N)
{
    S="AB";
    x=press(S);
    if(x==1)
    {
        S="A";
        y=press(S);
        if(y==1)t1='A';
        else t1='B';
    }
    else
    {
        S="X";
        y=press(S);
        if(y==1)t1='X';
        else t1='Y';
    }
    S="";
    S+=t1;
    for(i='A';i<='Z';++i)
    {
        if(i=='A'||i=='B'||i=='X'||i=='Y')
        {
            if(i!=t1)
            {
                v.push_back(char(i));
            }
        }
    }
    for(i=2;i<=N;++i)
    {
        s1=S;
        s1+=v[0];
        s1+=S;s1+=v[1];s1+=v[0];
        s1+=S;s1+=v[1];s1+=v[1];
        s1+=S;s1+=v[1];s1+=v[2];
        x=press(s1);
        if(x==S.size()+1)
        {
            S+=v[0];
            continue;
        }
        if(x==S.size())
        {
            S+=v[2];
            continue;
        }
        S+=v[1];
        continue;
    }
    return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:15:7: error: 'press' was not declared in this scope
   15 |     x=press(S);
      |       ^~~~~