Submission #504950

#	Time	Username	Problem	Language	Result	Execution time	Memory
504950		KiriLL1ca	Bank (IZhO14_bank)	C++17	100 / 100	819 ms	8664 KiB

bank

#include <bits/stdc++.h>
#define fr first
#define sc second
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pb push_back
#define endl '\n'
#define pw(x) (1ll << x)
#define sz(x) (int)((x).size())
#define sqr(x) ((ll)x)*((ll)x)
#define bcnt(X) __builtin_popcountll(X)
#define vec vector

#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

auto rng = bind(uniform_int_distribution<int>(1, 1e9), mt19937(228));

signed main ()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n, m; cin >> n >> m;
    vector <int> a (n), b (m);
    for (auto &i : a) cin >> i;
    for (auto &i : b) cin >> i;
    vector <vector <int>> sim (n);
    for (int msk = 0; msk < pw(m); msk++) {
        int sum = 0;
        for (int j = 0; j < m; j++) {
            if ((msk >> j) & 1) sum += b[j];
        }
        for (int i = 0; i < n; i++) {
            if (sum == a[i]) sim[i].pb(msk);
        }
    }

    vector <int> dp (pw(m), -1), ndp (pw(m), -1);
    dp[0] = 0; ndp[0] = 0;
    for (int i = 0; i < n; i++) {
        for (int msk = pw(m) - 1; msk >= 0; msk--) {
            if (dp[msk] != -1) {
                for (auto p : sim[i]) {
                    if (p & msk) continue;
                    int mask = p | msk;
                    ndp[mask] = max(ndp[mask], dp[msk] + 1);
                    if (ndp[mask] == n) {
                        cout << "YES" << endl;
                        return 0;
                    }
                }
            }
        }
        dp = ndp;
    }
    cout << "NO" << endl;
    return 0;
}

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