제출 #598427

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
598427		Jarif_Rahman	비스킷 담기 (IOI20_biscuits)	C++17	100 / 100	54 ms	1324 KiB

biscuits

#include "biscuits.h"
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

const int K = 60;

ll count_tastiness(ll X, vector<ll> A){
    while(A.size() < K+1) A.pb(0);
    A.pb(0);

    vector<ll> S(K+1);
    for(int i = 0; i < K; i++){
        if(i) S[i]+=S[i-1];
        S[i]+=A[i]*(1LL<<i);
    }

    unordered_map<ll, ll> dp;
    dp[0] = 1;

    function<ll(ll)> DP = [&](ll x){
        if(x < 0) return 0LL;
        if(dp.find(x) != dp.end()) return dp[x];

        int i = 63-__builtin_clzll(x);

        dp[x] = DP((1LL<<i)-1)+DP(min(x, S[i]/X)-(1LL<<i));
        return dp[x];
    };

    return DP(1LL<<K);
}

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