Submission #315715

#	Time	Username	Problem	Language	Result	Execution time	Memory
315715		Sorting	Packing Biscuits (IOI20_biscuits)	C++17	42 / 100	1089 ms	15864 KiB

biscuits

#include "biscuits.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

ll x, k;
vector<ll> a;

ll count_tastiness(ll _x, vector<ll> _a){
    x = _x, a = _a;
    k = a.size();

    map<ll, ll> curr, prev;
    prev[0] = 1;
    for(int i = 0; i < k; ++i, swap(prev, curr)){
        curr.clear();
        for(auto [key, value]: prev){
            ll t = key + a[i];
            curr[t / 2] += value;
            if(t >= x) curr[(t - x) / 2] += value; 
        }
    }

    ll ans = 0;
    for(auto [key, value]: prev)
        ans += (key / x + 1) * value;

    return ans; 
}

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