Submission #620623

#	Time	Username	Problem	Language	Result	Execution time	Memory
620623		8e7	Packing Biscuits (IOI20_biscuits)	C++17	33 / 100	1091 ms	128680 KiB

biscuits

//Challenge: Accepted
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r){
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 100005
#define pii pair<int, int>
#define ff first
#define ss second
#include "biscuits.h"

long long count_tastiness(long long x, std::vector<long long> a) {
	for (int i = 0;i < 60;i++) a.push_back(0);
	int k = a.size();
	for (int i = 0;i < k-1;i++) {
		ll d = max(0LL, ((a[i] - x)/2)*2);
		a[i] -= d;
		a[i+1] += d/2;
	}
	vector<ll> cnt(2*x+2, 0);
	int n = 2*x+2;
	cnt[0] = 1;
	for (int i = 0;i < k;i++) {
		for (int j = n-1;j >= 0;j--) {
			if (j >= a[i]) cnt[j] = cnt[j-a[i]];
			else cnt[j] = 0;
		}
		for (int j = 0;j < n;j++) {
			if (j >= x) cnt[j-x] += cnt[j];
		}
		for (int j = 0;j < n;j++) {
			cnt[j] = (j*2 < n ? cnt[j*2] : 0) + (j*2+1 < n ? cnt[j*2+1] : 0);
		}
		//pary(cnt.begin(), cnt.end());
	}
	ll ans = 0;
	for (int i = 0;i < n;i++) ans += cnt[i];
	return ans;
}

• Subtask 1: 0 / 9
• Subtask 2: 12 / 12
• Subtask 3: 21 / 21
• Subtask 4: 0 / 35
• Subtask 5: 0 / 23