Submission #130192

#	Time	Username	Problem	Language	Result	Execution time	Memory
130192		miguel	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include<bits/stdc++.h>
#include <combo.h>
using namespace std;
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define dbg(x) cout << #x << '=' << x << '\n';
#define ll long long
#define sz size()
#define x first
#define y second
#define pi pair <int, int>
#define pii pair <int, pi>
#define vi vector <int>
const ll mod = 1e9 + 7;

string guess_sequence(int n){
    string s="";
    char use[4];
    vector <char> ch={'A', 'B', 'X', 'Y'};
    if(press("AB")){
		if(press("A")){
			s+='A';
		}
		else{
			s+='B';
		}
	}
	else{
		if(press("X")){
			s+='X';
		}
		else{
			s+='Y';
		}
	}
   // cout<<s<<endl;
    vector <char> use;
    int q=0;
    for(int i=0; i<=3; i++){
        if(ch[i]!=s[0]) use[q]=ch[i], q++;
    }
    //for(string i: use) cout<<"x"<<i<<endl;
    string xd="";
    for(int i=1; i<n-1; i++){
        xd=(s+use[0]+s+use[1]+use[0]+s+use[1]+use[1]+s+use[1]+use[2]);
       // cout<<s<<" "<<xd;//<<endl;
        q=press(xd); //cout<<" "<<q<<endl;
        if(q==i+2) s+=use[1];
        else if(q==i+1) s+=use[0];
        else s+=use[2];
        //cout<<s<<endl;
    }//cout<<s<<endl;
    if(press(s+use[0])==n){
		return s+use[0];
	}
	if(press(s+use[1])==n){
		return s+use[1];
	}
	return s+use[2];
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:37:19: error: conflicting declaration 'std::vector<char> use'
   37 |     vector <char> use;
      |                   ^~~
combo.cpp:18:10: note: previous declaration as 'char use [4]'
   18 |     char use[4];
      |          ^~~