Submission #152522

#	Time	Username	Problem	Language	Result	Execution time	Memory
152522		ivandasfs	Combo (IOI18_combo)	C++14	0 / 100	1 ms	256 KiB

combo

#include <iostream>
#include <algorithm>
#include <set>

using namespace std;

set <char> b;
char c[3];

int press(string s);

/*
string ans = "ABXXY";

int press(string s) {
	int sol = 0;
	for (int i=0 ; i<s.size() ; i++) {
		if (s[i] == ans[0]) {
			int br = 0;
			for (int j=0 ; j < ans.size() and i + j < s.size() ; j++) {
				if (ans[j] == s[i+j]) br++;
				else break;
			}
			sol = max(sol, br);
		}
	}
	return sol;
}
*/
string guess_sequence(int n) {
	b.insert('A');
	b.insert('B');
	b.insert('X');
	b.insert('Y');
	string sol = "";
	if (press("AB"))
		if (press("A"))
			sol += 'A';
		else
			sol += 'B';
	else
		if (press("C"))
			sol += 'C';
		else
			sol += 'D';
	if (n==1) return sol;
	b.erase(b.find(sol[0]));
	int i = 0;
	for (set<char> :: iterator it = b.begin() ; it!=b.end() ; it++) {
		c[i++] = *it;
	}
	for (int i=1 ; i<n-1 ; i++) {
		int br = press(sol+c[0] + sol+c[1]+c[0] + sol+c[1]+c[1] + sol+c[1]+c[2]);
		if (br == sol.size() + 0) sol += c[2];
		else if (br == sol.size() + 1) sol += c[0];
		else sol += c[1];
	}
	if (press(sol+c[0]) == n)
		sol += c[0];
	else
		if (press(sol+c[1]) == n)
			sol += c[1];
		else
			sol += c[2];
	return sol;
}
/*
int main() {
	cout <<guess_sequence(5)<<endl;
	return 0;
}
*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:54:10: 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 (br == sol.size() + 0) sol += c[2];
      |       ~~~^~~~~~~~~~~~~~~~~
combo.cpp:55:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |   else if (br == sol.size() + 1) sol += c[0];
      |            ~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95