| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 552897 | fcmalkcin | Combo (IOI18_combo) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
#define ll int
#define pll pair<ll,ll>
#define ff first
#define ss second
//#define endl "\n"
#define pb push_back
#define F(i,a,b) for(ll i=a;i<=b;i++)
const ll maxn=4e6+3000;
const ll base=2e9;
const ll mod= 1e9+7 ;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
/*ll press(string t)
{
cout <<t<<endl;
ll x;
cin>> x;
return x;
}*/
string guess_sequence(ll n)
{
ll p=press("AB");
set<char> st;
st.insert('A');
st.insert('B');
st.insert('X');
st.insert('Y');
string res;
if (p)
{
ll p=press("A");
if (p)
st.erase('A'),res.pb('A');
else
st.erase('B'),res.pb('B');
}
else
{
ll p=press("X");
if (p)
st.erase('X'),res.pb('X');
else
st.erase('Y'),res.pb('Y');
}
for (int i=2; i<=n-1; i++)
{
string pt;
for (auto to:st)
{
pt+=res;
pt.pb(*st.begin());
pt.pb(to);
}
ll cnt=0;
for (auto to:st)
{
cnt++;
if (cnt==2)
{
pt+=res;
pt.pb(to);
break;
}
}
ll p=press(pt);
ll h=0;
if (p==res.length()+2)
{
h=1;
}
else if (p==res.length()+1)
{
h=2;
}
else
{
h=3;
}
cnt=0;
for (auto to:st)
{
cnt++;
if (cnt==h)
{
res.pb(to);
}
}
}
ll cnt=0;
for (auto to:st)
{
string pt=res;
pt.pb(to);
if (press(pt)==n)
{
res=pt;
break;
}
cnt++;
if (cnt==3) break;
}
if (res.length()!=n)
{
auto it=st.end();
it--;
res.pb(*it);
}
return res;
}
/*int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
if (fopen("t.inp","r"))
{
freopen("test.inp","r",stdin);
freopen("test.out","w",stdout);
}
cout <<guess_sequence(7);
}*/