제출 #1320106

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1320106		nicolo_010	비스킷 담기 (IOI20_biscuits)	C++20	100 / 100	48 ms	952 KiB

biscuits

#include <bits/stdc++.h>
#include "biscuits.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;

const int mX = 1e5+5;

map<ll, ll> memo;

ll x;
vector<ll> a;
vector<ll> s;

ll f(ll n) {
	if (n<=0) return 0;
	if (n==1) return 1;
	if (memo.count(n)) return memo[n];
	ll i = __lg(n-1);
	ll caso1 = f((1ll)<<(i));
	ll caso2 = f(min(n, 1+(s[i]/x))-((1ll)<<i));
	return memo[n] = caso1+caso2;
}

const ll INF = 1e18+5;

ll count_tastiness(ll X, vector<ll> A) {
	x = X, a = A;
	int k = a.size();
	s.assign(k, 0);
	s[0] = a[0];
	for (int i=1; i<k; i++) {
		s[i] = s[i-1] + a[i]*((1ll)<<i);
	}
	while (s.size()<61) s.push_back(s.back());
	ll ans = f(1+s.back());
	memo.clear();
	return ans;
}

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