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>
#define ll long long
#define fi first
#define se second
#define endl '\n'
#define MASK(i) (1LL << (i))
#define ull unsigned long long
#define ld long double
#define pb push_back
#define all(x) (x).begin() , (x).end()
#define BIT(x , i) ((x >> (i)) & 1)
#define TASK "task"
#define sz(s) (int) (s).size()
using namespace std;
const int mxN = 5e5 + 227;
const int inf = 1e9 + 277;
const int mod = 1e9 + 7;
const ll infll = 1e18 + 7;
const int base = 307;
const int LOG = 20;
template <typename T1, typename T2> bool minimize(T1 &a, T2 b) {
if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b) {
if (a < b) {a = b; return true;} return false;
}
string guess_sequence(int n)
{
vector<char> f({'A', 'B', 'X', 'Y'});
string res = "";
for(int i = 0; i < 3; i++) {
string tmp = res + f[i];
if(press(tmp) == 1) {
res += f[i];
break;
}
}
if(sz(res) == 0) res += f[3];
char ban = res[0];
vector<char> choose;
for(int i = 0; i < 4; i++) if(f[i] != ban) choose.pb(f[i]);
for(int i = 2; i <= n; i++) {
if(i != n) {
string tmp = "";
tmp += res + choose[0] + choose[0];
tmp += res + choose[0] + choose[1];
tmp += res + choose[0] + choose[2];
tmp += res + choose[1];
int x = press(tmp);
if(x == sz(res)) res += choose[2];
else if(x == sz(res) + 1) res += choose[1];
else res += choose[0];
}
else {
for(int j = 0; j < 3; j++) {
string tmp = res + choose[j];
if(press(tmp) > sz(res)) {
res += choose[j];
break;
}
}
if(sz(res) != n) res += choose[3];
}
}
return res;
}
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