Submission #361825

#	Time	Username	Problem	Language	Result	Execution time	Memory
361825		ryansee	Counting Mushrooms (IOI20_mushrooms)	C++14	25 / 100	139 ms	384 KiB

mushrooms

#include "mushrooms.h"

#include "bits/stdc++.h"
using namespace std;

#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define f first
#define s second
#define cbr cerr<<"hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ll(x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x,y) (lower_bound(all(x),y)-x.begin())
#define ubd(x,y) (upper_bound(all(x),y)-x.begin())
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
inline long long rand(long long x, long long y) { return rng() % (y+1-x) + x; } //inclusive
string inline to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){ return a==0?llabs(b):gcd(b%a,a); }

using ll=long long; 
using ld=long double;
#define FOR(i,s,e) for(int i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
using pi=pair<ll,ll>; using spi=pair<ll,pi>; using dpi=pair<pi,pi>; 

long long LLINF = 1e18;
int INF = 1e9+1e6;
#define MAXN (200006)

int count_mushrooms(int n) {
	int ans = 1;
	FOR(i,1,n-1) {
		if(i == n-1) {
			int res = use_machine({0, i});
			if(res == 0) ++ ans;
			break;
		}
		int res = use_machine({i, 0, i+1});
		if(res == 0) ans += 2;
		else if(res == 1) ans += 1;
		++ i;
	}
	return ans;
}

• Subtask 1: 25 / 100