Submission #1309751

#	Time	Username	Problem	Language	Result	Execution time	Memory
1309751		bluecat	Bank (IZhO14_bank)	C++20	0 / 100	241 ms	249024 KiB

bank

// #pragma GCC optimize("Ofast,unroll-loops")
// #pragma GCC target("avx,avx2,fma")
#include "bits/stdc++.h"
using namespace std;
using ll   = long long;
using ld   = long double;
using ui   = unsigned int;
using ull  = unsigned long long;
using i128 = __int128;
using pii  = pair<int, int>;
using pll  = pair<ll, ll>;
using t3i  = tuple<int, int, int>;
using t3l  = tuple<ll, ll, ll>;
using vi   = vector<int>;
using vl   = vector<long long>;
using arr  = array<int, 4>;
using node = pair<int, arr>;
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    freopen("bank.in","r",stdin);
    freopen("bank.out","w",stdout);
    int n, q; cin >> n >> q;
    vector<int> a(n), b(q);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < q; i++) cin >> b[i];
    int w = *max_element(a.begin(),a.end());
    vector<vi> dk(w+1);
    for (int m = 0; m < (1<<q); m++)
    {
        int s = 0;
        for (int i = 0; i < q; i++)
            if ((m>>i)&1) s += b[i];
        dk[s].push_back(m);
    }
    // auto print = [&](vi &a)
    // {
    //     for (int i = 0; i < a.size(); i++)
    //     {
    //         bitset<5> b(a[i]);
    //         cout << b << " \n"[i+1==a.size()];
    //     }
    // };
    // for (int i = 0; i <= w; i++)
    // {
    //     cout << i << ": ";
    //     print(dk[i]);
    // }
    vector<vi> d(n+1,vi(1<<q));
    d[0][0] = 1;
    for (int i = 1; i <= n; i++)
        for (int m = 0; m < (1<<q); m++)
            for (int j = 0; j < dk[a[i-1]].size(); j++)
            {
                int s = dk[a[i-1]][j];
                if ((s&m)==s) d[i][m] |= d[i-1][m^s];
            }
    int res = 0;
    for (int m = 0; m < (1<<q); m++) res |= d[n][m];
    cout << (res?"YES":"NO") << "\n";
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     freopen("bank.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bank.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     freopen("bank.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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