Submission #1315808

#	Time	Username	Problem	Language	Result	Execution time	Memory
1315808		phamducluong	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
//#include "combo.h"
//#include <ext/pb_ds/assoc_container.hpp>

//using namespace __gnu_pbds;
using namespace std;
using ll=long long;
//typedef tree<int,null_type,less_equal<int>,rb_tree_tag, tree_order_statistics_node_update> ordered_set;
#define mem(a,x)       memset(a,x,sizeof(a))
#define fast(s)        s.reserve(2000); s.max_load_factor(0.5);
#define F              first
#define S              second
#define pii            pair <int,int>
#define iii            tuple<int,int,int>
#define all(p)         p.begin(), p.end()
template<typename T> bool maximum(T &A, const T &B) {return A<B? A=B, true: false;}
template<typename T> bool minimum(T &A, const T &B) {return A>B? A=B, true: false;}
template<typename T> T gcd(T t) {return t;}
template<typename T, typename... Args> T gcd(T t, Args... args) {return __gcd(t,args...);};
void print(bool condition=1) {cout<<(condition? "YES\n": "NO\n");}
const int mod=1e9+7;
const int INF=1e9;
const int N=5e5+5, LOG=20;
const string s="ABXY";
//const string base="ABXYY";
//int press(string p)
//{
//    cout<<"ask "<<p<<"\n";
//    int cnt; cin>>cnt;
//    return cnt;
//}
string guess_sequence(int n)
{
    string res, cand, t;
    int cnt=press("AB");
    if(cnt)
    {
        cnt=press("A");
        if(cnt) res+='A';
        else res+='B';
    }
    else
    {
        cnt=press("X");
        if(cnt) res+='X';
        else res+='Y';
    }
    for(int i=0; i<4; ++i)
        if(s[i]!=res.front()) cand+=s[i];
    for(int i=1; i<n-1; ++i)
    {
        t=(res+cand[0]+cand[0]+res+cand[0]+cand[1]+res+cand[0]+cand[2]+res+cand[1]);
        cnt=press(t);
        if(cnt==(int)res.size()) res+=cand[2];
        else if(cnt==(int)res.size()+1) res+=cand[1];
        else res+=cand[0];
    }
    t=s+cand[0];
    cnt=press(t);
    if(cnt>(int)res.size()) res+=cand[0];
    else
    {
        t=s+cand[1];
        cnt=press(t);
        if(cnt>(int)res.size()) res+=cand[1];
        else res+=cand[2];
    }
    return res;
}
//signed main()
//{
//    cout<<guess_sequence(5);
//    return 0;
//}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:35:13: error: 'press' was not declared in this scope; did you mean 'res'?
   35 |     int cnt=press("AB");
      |             ^~~~~
      |             res