| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 309177 | 2020-10-02T20:02:18 Z | Vimmer | Counting Mushrooms (IOI20_mushrooms) | C++14 | 0 ms | 0 KB |
#include <bits/stdc++.h>
//#include "mushrooms.h"
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#define N 100005
#define PB push_back
#define sz(x) int(x.size())
#define F first
#define M ll(1e9 + 7)
#define S second
#define all(x) x.begin(), x.end()
#define endl '\n'
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("-O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")
using namespace std;
//using namespace __gnu_pbds;
typedef long long ll;
//typedef tree <int, null_type, less_equal <int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
int val[N], kol, sum = 0;
//
int use_machine(vector <int> &pr)
{
if (kol < 4) {for (auto it : pr) cout << it << " "; cout << endl; }
set <int> se; se.clear();
sum += sz(pr);
if (sz(pr) < 2) exit(0);
kol++;
int ans = 0;
for (int i = 1; i < sz(pr); i++)
if (val[pr[i]] != val[pr[i - 1]]) ans++;
return ans;
}
int skok = 103;
int ask(vector <int> &m) { return use_machine(m);}
int ask(set <int> &se) {vector <int> m; m.clear(); for (auto it : se) m.PB(it); return use_machine(m);}
ll mlt(ll x, ll y) {return (x * y) % M;}
ll sm(ll x, ll y) {return (x + y) % M;}
vector <int> tr, tl;
int es_minus_3(set <int> &se)
{
int ans = sz(tr);
while (sz(se) > 0)
{
int i = 0;
vector <int> m; m.clear();
if (sz(tr) > sz(tl))
{
while (i < sz(tr) && sz(se) > 0)
{
m.PB(tr[i++]);
m.PB(*se.begin());
se.erase(se.begin());
}
int val = ask(m);
int koler = (sz(m) / 2) - (val / 2);
if (val % 2) {koler--; tl.PB(m.back());}
else tr.PB(m.back());
ans += koler;
}
else
{
while (i < sz(tl) && sz(se) > 0)
{
m.PB(tl[i++]);
m.PB(*se.begin());
se.erase(se.begin());
}
int val = ask(m);
int koler = val / 2;
if (val % 2) {tr.PB(m.back()); koler++;}
else tl.PB(m.back());
ans += koler;
}
}
return ans;
}
void dec(set <int> &se) {se.erase(se.begin());}
int count_mushrooms(int n)
{
tr.PB(0);
vector <int> m; m.clear();
m.PB(0);
set <int> se; se.clear();
for (int i = 1; i < n; i++) se.insert(i);
if (n > 300)
{
vector <int> m = {0, *se.begin()};
dec(se);
if (ask(m) == 0)
{
tr.PB(m.back());
m.resize(4);
m[0] = 0;
m[2] = tr[1];
m[1] = *se.begin();
dec(se);
m[3] = *se.begin();
dec(se);
int val = ask(m);
if (val == 0) {tr.PB(m[1]); tr.PB(m[3]);} else
if (val == 1) {tr.PB(m[1]); tl.PB(m[3]);} else
if (val == 2) {tr.PB(m[3]); tl.PB(m[1]);} else
if (val == 3) {tl.PB(m[1]); tl.PB(m[3]);}
while (max(sz(tl), sz(tr)) < 3)
{
m.resize(4);
m[0] = 0;
m[2] = tr[1];
m[1] = *se.begin();
dec(se);
m[3] = *se.begin();
dec(se);
val = ask(m);
if (val == 0) {tr.PB(m[1]); tr.PB(m[3]);} else
if (val == 1) {tr.PB(m[1]); tl.PB(m[3]);} else
if (val == 2) {tr.PB(m[3]); tl.PB(m[1]);} else
if (val == 3) {tl.PB(m[1]); tl.PB(m[3]);}
}
}
else
{
tl.PB(m[1]);
m[1] = *se.begin();
dec(se);
if (ask(m) != 0)
{
tl.PB(m[1]);
m.clear();
m.PB(tl[0]);
m.PB(*se.begin());
dec(se);
m.PB(tl[1]);
m.PB(*se.begin());
dec(se);
int val = ask(m);
if (val == 0) {tl.PB(m[1]); tl.PB(m[3]);}
if (val == 1) {tl.PB(m[1]); tr.PB(m[3]);}
if (val == 2) {tl.PB(m[3]); tr.PB(m[1]);}
if (val == 3) {tr.PB(m[1]); tr.PB(m[3]);}
while (max(sz(tl), sz(tr)) < 3)
{
m[1] = *se.begin(); dec(se);
m[3] = *se.begin(); dec(se);
val = ask(m);
if (val == 0) {tl.PB(m[1]); tl.PB(m[3]);}
if (val == 1) {tl.PB(m[1]); tr.PB(m[3]);}
if (val == 2) {tl.PB(m[3]); tr.PB(m[1]);}
if (val == 3) {tr.PB(m[1]); tr.PB(m[3]);}
i++;
}
}
else
{
tr.PB(m.back());
m.resize(4);
m[0] = 0;
m[2] = tr[1];
m[1] = *se.begin();
dec(se);
m[3] = *se.begin();
dec(se);
int val = ask(m);
if (val == 0) {tr.PB(m[1]); tr.PB(m[3]);} else
if (val == 1) {tr.PB(m[1]); tl.PB(m[3]);} else
if (val == 2) {tr.PB(m[3]); tl.PB(m[1]);} else
if (val == 3) {tl.PB(m[1]); tl.PB(m[3]);}
while (max(sz(tl), sz(tr)) < 3)
{
m.resize(4);
m[0] = 0;
m[2] = tr[1];
m[1] = *se.begin();
dec(se);
m[3] = *se.begin();
dec(se);
val = ask(m);
if (val == 0) {tr.PB(m[1]); tr.PB(m[3]);} else
if (val == 1) {tr.PB(m[1]); tl.PB(m[3]);} else
if (val == 2) {tr.PB(m[3]); tl.PB(m[1]);} else
if (val == 3) {tl.PB(m[1]); tl.PB(m[3]);}
}
}
}
while (max(sz(tl), sz(tr)) < skok)
{
m.resize(6);
m[1] = *se.begin(); dec(se);
m[3] = *se.begin(); dec(se);
m[5] = *se.begin(); dec(se);
if (sz(tl) > sz(tr))
{
m[0] = tl[0];
m[2] = tl[1];
m[4] = tl[2];
int val = ask(m);
if (val % 2) tr.PB(m[5]);
else tl.PB(m[5]);
if (val == 0) {tl.PB(m[1]); tl.PB(m[3]);}
if ((val == 4 || val == 5)) {tr.PB(m[1]); tr.PB(m[3]);}
if (val == 2 || val == 3)
{
vector <int> p; p.resize(4);
for (int i = 0; i < 4; i++) p[i] = m[i];
val = ask(p);
if (val == 0) {tl.PB(m[1]); tl.PB(m[3]);}
if (val == 1) {tl.PB(m[1]); tr.PB(m[3]);}
if (val == 2) {tr.PB(m[1]); tl.PB(m[3]);}
if (val == 3) {tr.PB(m[1]); tr.PB(m[3]);}
}
}
else
{
m[0] = tr[0];
m[2] = tr[1];
m[4] = tr[2];
int val = ask(m);
if (val % 2) tl.PB(m[5]);
else tr.PB(m[5]);
if (val == 0) {tr.PB(m[1]); tr.PB(m[3]);}
if ((val == 4 || val == 5)) {tl.PB(m[1]); tl.PB(m[3]);}
if (val == 2 || val == 3)
{
vector <int> p; p.resize(4);
for (int i = 0; i < 4; i++) p[i] = m[i];
val = ask(p);
if (val == 0) {tr.PB(m[1]); tr.PB(m[3]);}
if (val == 1) {tr.PB(m[1]); tl.PB(m[3]);}
if (val == 2) {tl.PB(m[1]); tr.PB(m[3]);}
if (val == 3) {tl.PB(m[1]); tl.PB(m[3]);}
}
}
}
}
return es_minus_3(se);
}
int main()
{
iostream::sync_with_stdio(0); ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
freopen("1.in", "r", stdin); //freopen("fcolor.out", "w", stdout);
int n;
cin >> n;
int num = 0;
for (int i = 0; i < n; i++) {cin >> val[i]; if (val[i] == 0) num++;}
cout << num << endl;
cout << count_mushrooms(n) << endl;
cout << kol << " " << sum << endl;
}