Submission #430222

#	Time	Username	Problem	Language	Result	Execution time	Memory
430222		alishahali1382	Counting Mushrooms (IOI20_mushrooms)	C++14	56.78 / 100	15 ms	360 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
#pragma GCC optimize("O2")
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
#define debug(x) {cerr<<#x<<"="<<x<<"\n";}
#define debug2(x, y) {cerr<<"{"<<#x<<", "<<#y<<"}={"<<x<<", "<<y<<"}\n";}
#define debugp(p) {cerr<<#p<<"={"<<p.first<<", "<<p.second<<"}\n";}
#define debugv(abcd) {cerr<<#abcd<<": "; for (auto dcba:abcd) cerr<<dcba<<", ";cerr<<"\n";}
#define pb push_back
#define all(x) x.begin(), x.end()
#define SZ(x) ((int)x.size())

const int inf=1000000100; // 1e9
const ll INF=10000000001000000; // 1e16
const int mod=1000000007;
const int MAXN=20010;

int n, m, k, x, y, a, b, t=100, ans;
vi A, B;

inline int ask(vi vec){ return use_machine(vec);}
int Solve(vi vec){
	if (SZ(A)>t){
		vi shit;
		for (int i=0; i<SZ(vec); i++){
			shit.pb(A[i]);
			shit.pb(vec[i]);
		}
		shit.pb(A[SZ(vec)]);
		return SZ(vec)-ask(shit)/2;
	}
	vi shit;
	for (int i=0; i<SZ(vec); i++){
		shit.pb(B[i]);
		shit.pb(vec[i]);
	}
	shit.pb(B[SZ(vec)]);
	return ask(shit)/2;	
}

int count_mushrooms(int _n){
	n=_n;
	if (n<400){ // wtf am I doing?
		ans=1;
		for (int i=1; i<n; i+=2){
			if (i==n-1){
				ans+=1-ask({0, i});
				continue ;
			}
			ans+=2-ask({i, 0, i+1});
		}
		return ans;
	}
	A.pb(0);
	for (int i=1; i<=2*t; i++){
		if (ask({0, i})) B.pb(i);
		else A.pb(i);
	}


	// debugv(A)
	// debugv(B)

	ans=SZ(A);
	for (int i=2*t+1; i<n; ){
		vi vec;
		for (int j=0; j<t && i<n; j++, i++)
			vec.pb(i);
		// debugv(vec)
		ans+=Solve(vec);
	}
	return ans;
}

• Subtask 1: 56.7839 / 100