이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pi;
typedef pair<long long, long long> pl;
const int MOD = 1e9 + 7;
const ll INF = 1e18;
const double EPS = 1e-6;
string guess_sequence(int N) {
vector<char> but = {'A', 'B', 'X', 'Y'};
string ans;
if (press("AB") >= 1) ans = press("A") ? "A" : "B";
else ans = press("X") ? "X" : "Y";
but.erase(find(but.begin(), but.end(), ans[0]));
for (int i = 1; i < N - 1; ++i) {
int res = press(ans + but[0] + ans + but[1] + but[0] + ans + but[1] + but[1] + ans + but[1] + but[2]);
if (res == ans.length()) ans += but[2];
else if (res == ans.length() + 1) ans += but[0];
else ans += but[1];
}
if (ans.size() == N) return ans;
if (press(ans + but[0]) == ans.length() + 1) ans += but[0];
else if (press(ans + but[1]) == ans.length() + 1) ans += but[1];
else ans += but[2];
return ans;
}
컴파일 시 표준 에러 (stderr) 메시지
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:27:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
27 | if (res == ans.length()) ans += but[2];
| ~~~~^~~~~~~~~~~~~~~
combo.cpp:28:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
28 | else if (res == ans.length() + 1) ans += but[0];
| ~~~~^~~~~~~~~~~~~~~~~~~
combo.cpp:31:17: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
31 | if (ans.size() == N) return ans;
| ~~~~~~~~~~~^~~~
combo.cpp:32:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
32 | if (press(ans + but[0]) == ans.length() + 1) ans += but[0];
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
combo.cpp:33:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
33 | else if (press(ans + but[1]) == ans.length() + 1) ans += but[1];
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
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