Submission #414072

#	Time	Username	Problem	Language	Result	Execution time	Memory
414072		arneves	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define pb push_back
#define f first
#define s second
#define all(x) x.begin(), x.end()

const int MOD = 1'000'000'007;
const int MX = 400'005;
//long double PI = 3.14159265358979323846264338327950;

const string k="ABXY";

int pergunta(string s){
    int ans=0;
    int r=press(s+k[0]+s+k[1]);
    if(r==s.length())ans+=2;
    r=press(s+k[0]+s+k[2]);
    if(r==s.length())ans+=1;
    return ans;
}

string guess_sequence(int N) {
    int id[4];
    string ans;
    for(int i=0; i<4; i++) id[i]=i;
    int y=pergunta("");
    ans+=k[y];
    swap(id[y],id[3]);
    for(int i=1; i<N-1; i++){
        string perg;
        perg+=ans+k[id[1]];
        perg+=ans+k[id[2]]+k[id[0]];
        perg+=ans+k[id[2]]+k[id[1]];
        perg+=ans+k[id[2]]+k[id[2]];
        y=press(perg);
        if(y==ans.length()){
            ans+=k[id[0]];
        }else if(y==ans.length()+1){
            ans+=k[id[1]];
        }else{
            ans+=k[id[2]];
        }
    }
    y=pergunta(ans);
    ans+=k[y];
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'int pergunta(std::string)':
combo.cpp:20:11: error: 'press' was not declared in this scope
   20 |     int r=press(s+k[0]+s+k[1]);
      |           ^~~~~
combo.cpp:21:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     if(r==s.length())ans+=2;
      |        ~^~~~~~~~~~~~
combo.cpp:23:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     if(r==s.length())ans+=1;
      |        ~^~~~~~~~~~~~
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:40:11: error: 'press' was not declared in this scope
   40 |         y=press(perg);
      |           ^~~~~
combo.cpp:41:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         if(y==ans.length()){
      |            ~^~~~~~~~~~~~~~
combo.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |         }else if(y==ans.length()+1){
      |                  ~^~~~~~~~~~~~~~~~