Submission #837098

#	Time	Username	Problem	Language	Result	Execution time	Memory
837098		azatega	Packing Biscuits (IOI20_biscuits)	C++14	21 / 100	1044 ms	63300 KiB

biscuits

#include <iostream>
#include <map>
#include <vector>

using namespace std;

#define ll long long

map<pair<int, ll>, ll> memo;
vector<ll> a;
int n;
ll x;

ll compute(int k, ll amount){
    if(memo[{k, amount}] > 0)
        return memo[{k, amount}];

    if(k == a.size() - 1){
        // last one
        ll res = 1; // can always be zero
        if(amount >= x) // can be 1
            res++;
        memo[{k, amount}] = res;
        return res;
    }

    ll res = 0;
    if(amount >= x)
        res += compute(k+1, a[k+1] + (amount - x)/2); // can be 1
    res += compute(k+1, a[k+1] + amount/2); // can be 0
    memo[{k, amount}] = res;
    // cout << k << " - " << amount << ": " << memo[{k, amount}] << endl;
    return res;
}

long long count_tastiness(long long _x, vector<long long> _a){
    memo.clear();

    a = _a;
    x = _x;
    n = _a.size();

    for(int i = 0; i < 100; i++)
        a.push_back(0);

    return compute(0, a[0]);
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int compute(int, long long int)':
biscuits.cpp:18:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     if(k == a.size() - 1){
      |        ~~^~~~~~~~~~~~~~~

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