Submission #1234504

#	Time	Username	Problem	Language	Result	Execution time	Memory
1234504		PlayVoltz	Packing Biscuits (IOI20_biscuits)	C++20	100 / 100	8 ms	840 KiB

biscuits

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

#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second

long long count_tastiness(long long x, vector<long long> a){
	while (a.size()<=60)a.push_back(0);
	vector<int> psum(65, a[0]), dp(65, 0);
	for (int i=1; i<=60; ++i)psum[i]=psum[i-1]/2+a[i];
	dp[0]=1+(a[0]>=x);
	for (int i=1; i<=60; ++i){
		dp[i]=dp[i-1];
		if (psum[i]<x)continue;
		int c=max(0ll, x-a[i]);
		for (int j=i-1; j>=1; --j){
			c*=2;
			if (psum[j]>=c+x)dp[i]+=dp[j-1], c=max(0ll, c+x-a[j]);
			else c=max(0ll, c-a[j]);
		}
		dp[i]+=(a[0]>=c*2+x?2:1);
	}
	return dp[60];
}

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