Submission #489570

#	Time	Username	Problem	Language	Result	Execution time	Memory
489570		PoPularPlusPlus	Combo (IOI18_combo)	C++17	100 / 100	43 ms	668 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long 
#define pb(e) push_back(e)
#define sv(a) sort(a.begin(),a.end())
#define sa(a,n) sort(a,a+n)
#define mp(a,b) make_pair(a,b)
#define vf first
#define vs second
#define ar array
#define all(x) x.begin(),x.end()
const int inf = 0x3f3f3f3f;
const int mod = 1000000007; 
const double PI=3.14159265358979323846264338327950288419716939937510582097494459230;
bool remender(ll a , ll b){return a%b;}

string guess_sequence(int n){
	string s = "";
	int x = press("AB");
	if(x >= 1){
		x = press("A");
		if(x == 1)s += "A";
		else s += "B";
	}
	else {
		x = press("X");
		if(x == 1)s += "X";
		else s += "Y";
	}
	string rem = "";
	char arr[4] = {'A','B','X','Y'};
	for(int i = 0; i < 4; i++){
		if(arr[i] == s[0])continue;
		rem += arr[i];
	}
	while((int)s.size() < n-1){
		string t = s + rem[0] + s + rem[1] + rem[0] + s + rem[1] + rem[1] + s + rem[1] + rem[2];
		x = press(t);
		if(x == (int)s.size()){
			s += rem[2];
		}
		else if(x == (int)s.size() + 1)s += rem[0];
		else s += rem[1];
	}
	if(s.size() == n)return s;
	string t = s + rem[0];
	x = press(t);
	if(x == s.size() + 1)s += rem[0];
	else {
		t = s + rem[1];
		 x= press(t);
		 if(x == s.size() + 1)s += rem[1];
		 else s += rem[2];
	}
	return s;
}
/*
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
	int t;cin >> t;while(t--)
	solve();
	return 0;
}
*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:47:14: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 |  if(s.size() == n)return s;
      |     ~~~~~~~~~^~~~
combo.cpp:50:7: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |  if(x == s.size() + 1)s += rem[0];
      |     ~~^~~~~~~~~~~~~~~
combo.cpp:54:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |    if(x == s.size() + 1)s += rem[1];
      |       ~~^~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95