Submission #430393

#	Time	Username	Problem	Language	Result	Execution time	Memory
430393		alireza_kaviani	Packing Biscuits (IOI20_biscuits)	C++17	100 / 100	349 ms	1348 KiB

biscuits

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

typedef long long ll;

#define sep ' '

const int MAXN = 62;
ll x , A[MAXN];
map<ll , ll> dp[MAXN];

ll solve(int i , ll j){
	if(i == -1)	return (j == 0);
	if(j >= 4 * x)	return 0;
	if(dp[i].find(j) != dp[i].end())	return dp[i][j];
	ll y = max(0ll , j - A[i]) * 2;
	dp[i][j] = solve(i - 1 , y) + solve(i - 1 , x + y);
//	cout << i << sep << j << sep << dp[i][j] << endl;
	return dp[i][j];
}

ll count_tastiness(ll x, vector<ll> a) {
	::x = x; int n = a.size();
	for(int i = 0 ; i < MAXN ; i++){
		dp[i] = map<ll , ll>(); A[i] = 0;
	}
	for(int i = 0 ; i < n ; i++){
		A[i] = a[i];
	}
	for(int i = 0 ; i + 1 < MAXN ; i++){
		ll val = min(A[i] , A[i] % x + x);
		if(val % 2 != A[i] % 2)	val++;
		A[i + 1] += (A[i] - val) / 2;
		A[i] = val;
//		cout << A[i] << sep;
	}
//	cout << sep << A[61] << endl;
	return solve(61 , 0);
}

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