Submission #106289

#	Time	Username	Problem	Language	Result	Execution time	Memory
106289		Frankenween	Bank (IZhO14_bank)	C++14	100 / 100	101 ms	552 KiB

bank

#include <bits/stdc++.h>


//#define _FORTIFY_SOURCE 0
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("no-stack-protector")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define ull unsigned long long
#define pii pair<ll, ll>
#define mp make_pair
#define ll long long
#define ld long double
#define pb push_back
#define deb(x) cout << #x << " = " << x << endl
#define all(x) x.begin(), x.end()
#define vi vector<ll>

const ll mod = (ll)1e9 + 7;
const ll inf = (ll)1e18;
const long double e = 2.718281828459;
const long double pi = atan2l(0, -1);


using namespace std;


template <class T>
istream& operator>>(istream &in, vector<T> &arr) {
    for (T &cnt : arr) {
        in >> cnt;
    }
    return in;
};


void solve() {
    ll n, m;
    cin >> n >> m;
    vector<ll> a(n), b(m);
    cin >> a >> b;
    vector<bool> used((1 << m), false);
    random_shuffle(all(b));
    vector<ll> need = a;

    function<bool(int, int)> sosatb = [&](int gay, int msk) {
        used[msk] = true;
        if (gay == n) {
            return true;
        }
        for (int i = 0; i < m; i++) {
            if ((msk & (1 << i)) or need[gay] < b[i] or used[(msk | (1 << i))]) {
                continue;
            }
            need[gay] -= b[i];
            bool ans;
            if (need[gay] == 0) {
                ans = sosatb(gay + 1, (msk | (1 << i)));
            } else {
                ans = sosatb(gay, (msk | (1 << i)));
            }
            need[gay] += b[i];
            if (ans) {
                return true;
            }
        }
        return false;
    };
    if (sosatb(0, 0)) {
        cout << "YES";
    } else {
        cout << "NO";
    }
}


int main() {
#ifndef LOCAL
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
#else
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    cout.precision(30);
    srand(time(0));
    cout.setf(ios::fixed);
    solve();
    return 0;
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29