Submission #173378

#	Time	Username	Problem	Language	Result	Execution time	Memory
173378		FieryPhoenix	Combo (IOI18_combo)	C++11	Compilation error	0 ms	0 KiB

combo

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstdio>
#include <map>
#include <queue>
#include <set>
#include <iomanip>
#include <deque>
#include <cassert>
#include <ctime>
#include <cstring>
#include <cstdlib>
#include <chrono>
#include <ctime>
#include <random>
#include <stack>
#include <unordered_set>
#include <unordered_map>
#include <iterator>
#include <climits>
using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef long long ll;
typedef long double ld;
#define INF 2001001001
#define MOD 1000000007

string guess_sequence(int N){
  string ans="";
  vector<char>v;
  v.push_back('A');
  v.push_back('B');
  v.push_back('X');
  v.push_back('Y');
  int AB=press("AB");
  if (AB>0){
    int A=press("A");
    if (A==1){
      ans+='A';
      v.erase(v.begin());
    }
    else{
      ans+='B';
      v.erase(v.begin()+1);
    }
  }
  else{
    int X=press("X");
    if (X==1){
      ans+='X';
      v.erase(v.begin()+2);
    }
    else{
      ans+='Y';
      v.erase(v.begin()+3);
    }
  }
  if (N==1)
    return ans;
  while ((int)ans.size()+2<=N){
   int res=press(ans+v[0]+v[0]+ans+v[0]+v[1]+ans+v[0]+v[2]+ans+v[1]);
   if (res==(int)ans.size()+2)
     ans+=v[0];
   else if (res==(int)ans.size()+1)
     ans+=v[1];
   else
     ans+=v[2];
  }
  int res=press(ans+v[0]+ans+v[1]);
  if (res==(int)ans.size())
    return ans+v[2];
  else{
    int res2=press(ans+v[0]);
    if (res2==res)
      return ans+v[0];
    else
      return ans+v[1];
  }
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:38:10: error: 'press' was not declared in this scope
   38 |   int AB=press("AB");
      |          ^~~~~