Submission #576689

#	Time	Username	Problem	Language	Result	Execution time	Memory
576689		Halym2007	Combo (IOI18_combo)	C++11	100 / 100	41 ms	580 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
#define ff first
#define ss second
#define cont continue;
#define sz size()
#define pb push_back
using namespace std;
typedef long long ll;
// const int N = 100005;

vector <char> v = {'X', 'Y', 'A', 'B'};
string s, hp, gp;
vector <char> q;
int jp;

string guess_sequence(int N) {
	int a = press("AB");
	if (a) {
		if (press("A")) {
			s += 'A';
		}
		else s += 'B';
	}
	else {
		if (press("X")) {
			s += 'X';
		}
		else s += 'Y';
	}
	for (int i = 0; i < 4; i++) {
		if (v[i] != s[0]) {
			q.pb (v[i]);
		}
	}
	while (s.sz < N-1) {
		hp += s + q[0];
		hp += s + q[1] + q[1];
		hp += s + q[1] + q[2];
		hp += s + q[1] + q[0];
		jp = press(hp);
		if (jp == s.sz) {
			s += q[2];
		}
		else if (jp == s.sz + 1) {
			s += q[0];
		}
		else s += q[1];
		hp = "";
	}
	if (N > 1){
		if (press(s + q[0]) == s.sz + 1) s += q[0];
		else if (press(s + q[1]) == s.sz + 1) s += q[1];
		else s += q[2];
	}
	return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:36:14: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 |  while (s.sz < N-1) {
      |         ~~~~~^~~~~
combo.cpp:42:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   if (jp == s.sz) {
      |          ^
combo.cpp:45:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   else if (jp == s.sz + 1) {
      |            ~~~^~~~~~~~~~~
combo.cpp:52:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |   if (press(s + q[0]) == s.sz + 1) s += q[0];
      |       ~~~~~~~~~~~~~~~~^~~~~~~~~~~
combo.cpp:53:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |   else if (press(s + q[1]) == s.sz + 1) s += q[1];
      |            ~~~~~~~~~~~~~~~~^~~~~~~~~~~

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