이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include<bits/stdc++.h>
#include "combo.h"
using namespace std;
typedef int ll;
typedef pair<ll,ll> pl;
typedef vector<ll> vl;
#define po pop_back
#define pb push_back
#define mk make_pair
#define lw lower_bound
#define up upper_bound
#define ff first
#define ss second
#define boost ios_base::sync_with_stdio(); cin.tie(0); cout.tie(0);
#define MOD 1000000007
#define MAX 1e18
#define MIN -1e18
#define rep(i,a,b) for(ll i=a;i<=b;i++)
#define per(i,a,b) for(ll i=b;i>=a;i--)
#define con continue
#define freopen freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);
#define PI 3.14159265358979323846264338327950288419716939937510582097494459230781640628
// typedef tree<ll , null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
// template< typename T>
// using indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
// ll n,m,ans,mid,mn,mx,T,sum,h1,h2,e[1234567],b[1234567],c[1234567],d[1<<20],k,i,j,l,r,h,a[1234567],w,x,y,z,res,cnt,sz;
bool used[1234567];
vector<ll> v[1234567];
string s1,s;
vector<string> c = {"A", "B", "X", "Y"};
string guess_sequence(int N) {
int first = -1;
if(press("AB")) {
if(press("A")) first = 0;
else first = 1;
} else if(press("X")) first = 2;
else first = 3;
string ans = c[first];
c.erase(c.begin() + first);
for(int i = 1; i < N - 1; i++) {
string s = ans+c[0]+c[0]+ans+c[0]+c[1]+ans+c[0]+c[2]+ans+c[1];
int x = press(s);
if(x == i + 2) ans += c[0];
else if(x == i+1) ans += c[1];
else ans += c[2];
}
if(N > 1) {
if(press(ans+c[0]) == N) ans += c[0];
else if(press(ans + c[1]) == N) ans += c[1] ;
else ans += c[2];
}
return ans;
}
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