| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 484996 | AmirElarbi | Counting Mushrooms (IOI20_mushrooms) | C++14 | 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 "mushrooms.h"
#include <bits/stdc++.h>
#define vi vector<int>
#define ve vector
#define ll long long
#define vf vector<float>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define fi first
#define se second
#define INF 1e7
#define eps 1e-18
#define eps1 1e-25
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);
#define MAX_A 1e5+5
#define V 450
using namespace std;
const int MOD = 1e9+7;
const int nax = 2000005;
int count_mushrooms(int n) {
int X = 200;
vi typ[2];
typ[0].pb(0);
if(n < 300){
int cnt = 1;
for(int i = 1;i<n;i++){
vector<int> a;
a.push_back(0);
a.push_back(i);
int x = use_machine(a);
if(x == 0)cnt++;
}
return cnt;
}
for(int i = 1; i <= 2; i++){
typ[use_machine({0,i})].pb(i);
}
bool B = false;
if(typ[1].size() == 2)
B = true;
int res = 0;
res = use_machine({typ[B][0],3,typ[B][1], 4});
if(res == 0){
typ[B].pb(3);
typ[B].pb(4);
} else if(res == 1){
typ[B].pb(3);
typ[B^1].pb(4);
} else if(res == 2){
typ[B^1].pb(3);
typ[B].pb(4);
} else {
typ[B^1].pb(3);
typ[B^1].pb(4);
}
B = false;
if(typ[1].size() >= 3)
B = true;
for (int i = 5; i < X; i+=5)
{
int res = use_machine({typ[B][0], i, typ[B][1],i+1, typ[B][2], i+2});
if(res%2==1)
typ[1-B].pb(i+2);
else typ[B].pb(i+2);
res -= res%2;
if(res%4==0){
if(res == 4){
typ[B^1].pb(i);
typ[B^1].pb(i+1);
} else if(res == 0){
typ[B].pb(i);
typ[B].pb(i+1);
}
res = use_machine({typ[B][0], i+3, typ[B][1],i+4});
if(res == 0){
typ[B].pb(i+3);
typ[B].pb(i+4);
} else if(res == 1){
typ[B].pb(i+3);
typ[B^1].pb(i+4);
} else if(res == 2){
typ[B^1].pb(i+3);
typ[B].pb(i+4);
} else {
typ[B^1].pb(i+3);
typ[B^1].pb(i+4);
}
} else {
if(min(typ[0].size(), typ[1].size())>=2){
res = use_machine({typ[B^1][0], i, typ[B^1][1], typ[B][0],i+1, typ[B][1], i+3 ,typ[B][2], i+4});
if(res%2==0){
typ[1-B].pb(i+4);
res--;
}
else typ[B].pb(i+4);
if(res>=4){
typ[B].pb(i);
typ[1-B].pb(i+1);
if(res == 5) typ[B].pb(i+3);
else typ[1-B].pb(i+3);
} else {
typ[1-B].pb(i);
typ[B].pb(i+1);
if(res == 1) typ[B].pb(i+3);
else typ[1-B].pb(i+3);
}
} else {
res = use_machine({0,i});
typ[res].pb(i);
typ[1-res].pb(i+1);
res = use_machine({typ[B][0], i+3, typ[B][1],i+4});
if(res == 0){
typ[B].pb(i+3);
typ[B].pb(i+4);
} else if(res == 1){
typ[B].pb(i+3);
typ[B^1].pb(i+4);
} else if(res == 2){
typ[B^1].pb(i+3);
typ[B].pb(i+4);
} else {
typ[B^1].pb(i+3);
typ[B^1].pb(i+4);
}
}
}
}
int cnt = typ[0].size();
#define sz(x) (int)x.size()
{
int i = k+1;
while(i<n){
if(sz(typ[0]) >= sz(typ[1])){
vector<int> a;
for(int j : typ[0]){
a.pb(j);
a.pb(i);
i++;
if(i == n)break;
}
int x = use_machine(a);
cnt += (int)(a.size()/2) - (x+1)/2;
if(x%2){
typ[1].pb(a.back());
}
else typ[0].pb(a.back());
}
else {
vector<int> b;
for(int j : typ[1]){
b.pb(j);
b.pb(i);
i++;
if(i == n)break;
}
int x = use_machine(b);
cnt += (x+1)/2;
if(x%2){
typ[0].pb(b.back());
}
else typ[1].pb(b.back());
}
}
}
return cnt;
}