Submission #1013290

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013290		armashka	Bank (IZhO14_bank)	C++17	71 / 100	1018 ms	596 KiB

bank

#include<bits/stdc++.h>

// #pragma GCC target("avx2")
// #pragma GCC optimize("Ofast")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;

#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file(s) freopen(s".in", "r", stdin);freopen(s".out", "w", stdout);
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ft first
#define sd second
#define ll long long
#define ull unsigned ll
#define pii pair<int,int>
#define pll pair<ll,ll>
const int N = 1e6 + 10;
const int M = 1e6 + 5;
const int B = 316;
const ll msize = 2;
const ll mod1 = 1e9 + 7;
const ll mod2 = 998244353;
const long double Phi = acos(-1);
const long long inf = 2e18;
const vector <pair<int, int>> dir = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}};

ll binmul(ll x, ll ti, ll m);
ll binpow(ll x, ll ti, ll m);

int n, m, a[20], b[20];
unordered_map<int, bool> dp[21];
vector <int> g[20];

void rec(int id, int mask) {
    if (id == n) {
        cout << "YES";
        exit(0);
    }

    if (dp[id].find(mask) != dp[id].end()) return;

    for (auto x : g[id]) {
        int intersection = (x & mask);
        if (!intersection) {
            rec(id + 1, x + mask);
        }
    }
    dp[id][mask] = 0;
    return;
}

const void solve() {
    cin >> n >> m;
    for (int i = 1; i <= n; ++ i) cin >> a[i - 1];
    for (int i = 1; i <= m; ++ i) cin >> b[i - 1];

    for (int i = 0; i < n; ++ i) {
        for (int mask = 0; mask < (1 << m); ++ mask) {
            int sum = 0;

            int x = mask, pos = 0;
            while (x) {
                if (x & 1) sum += b[pos];
                x >>= 1;
                ++ pos;
            }

            if (sum == a[i]) g[i].pb(mask);
        }
        random_shuffle(all(g[i]));
    }

    rec(0, 0);
    cout << "NO\n";
}  

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    srand(time(NULL));

    // file("maze");

    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);

    int tt = 1;
    // cin >> tt;
    for (int i = 1; i <= tt; ++ i) {
        // cout << "Case " << i << ":\n";
        solve();
    }

    #ifndef ONLINE_JUDGE
    cerr << "\n" << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
    #endif

    return 0;
} 


// Template functions
ll binmul(ll x, ll ti, ll m) { ll res = 0;while (ti){if(ti & 1)res += x;x += x;ti >>= 1; x %= m; res %= m;} return res;}
ll binpow(ll x, ll ti, ll m) { ll res = 1;while (ti){if(ti & 1)(res *= x)%=m;(x*=x)%=m;ti >>= 1; x %= m; res %= m;} return res;}
 

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29