| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1189756 | countless | Packing Biscuits (IOI20_biscuits) | C++20 | 0 ms | 0 KiB |
#include "biscuits.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
const ll MOD = 998244353;
const ll INF = 1e18;
const ld EPS = 1e-12;
#define endl "\n"
#define sp <<" "<<
#define REP(i, a, b) for(ll i = a; i < b; i++)
#define dbg(x) cout << #x << " = " << x << endl
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define fast_io() ios_base::sync_with_stdio(false); cin.tie(NULL)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) ((ll)(x).size())
struct custom_hash {
static uint64_t splitmix64(uint64_t x) {
// http://xorshift.di.unimi.it/splitmix64.c
x += 0x9e3779b97f4a7c15;
x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
return x ^ (x >> 31);
}
size_t operator()(uint64_t x) const {
static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
return splitmix64(x + FIXED_RANDOM);
}
};
template <typename Key, typename Value>
using hash_map = unordered_map<Key, Value, custom_hash>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// uniform_int_distribution<int>(a, b)(rng);
// shuffle(all(a), rng);
ll count_tastiness(ll x, vector<ll> a) {
while (a.size() < 61)
a.push_back(0);
map<ll, ll> curr, next;
curr[0] = 1;
REP(i, 0, 61) {
for (auto &y : curr) {
ll cur = a[i] + y.first;
ll nxt = cur / 2;
next[nxt] += y.second;
if (cur >= x) {
nxt = (cur - x) / 2;
next[nxt] += y.second;
}
}
curr.swap(next);
next.clear();
}
ll ans = 0;
for (auto &y : curr) {
ans += y.second;
}
return ans;
}
signed main() {
ll t; cin >> t;
while (t--) {
ll k, x; cin >> k >> x;
vector<ll> a(k);
REP(i, 0, k)
cin >> a[i];
cout << count_tastiness(x, a) << endl;
}
}