Submission #837472

#	Time	Username	Problem	Language	Result	Execution time	Memory
837472		uped	Bank (IZhO14_bank)	C++14	0 / 100	1 ms	340 KiB

bank

#include<bits/stdc++.h>

using namespace std;

using ll = long long;

vector<ll> sieve(ll n) {
    vector<bool> is_prime(n + 1, true);
    is_prime[0] = is_prime[1] = false;
    for (ll i = 2; i <= n; i++) {
        if (is_prime[i] && (long long) i * i <= n) {
            for (ll j = i * i; j <= n; j += i)
                is_prime[j] = false;
        }
    }
    vector<ll> primes;
    for (ll i = 2; i <= n; ++i) {
        if (is_prime[i]) {
            primes.push_back(i);
        }
    }
    return primes;
}

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

void fileio(const string &name) {
    freopen((name + ".in").c_str(), "r", stdin);
    freopen((name + ".out").c_str(), "w", stdout);
}


int main() {
    int n, m;
    cin >> n >> m;
    vector<int> a(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }
    vector<int> b(m);
    for (int i = 0; i < m; ++i) {
        cin >> b[i];
    }
    vector<vector<uint32_t>> masks(1001);
    vector<int> dp1(1 << m);
    for (uint32_t i = 1; i < (1 << m); ++i) {
        for (int j = 0; j < m; ++j) {
            if (i & (1 << j)) {
                dp1[i] = dp1[i ^ (1 << j)] + b[j];
                if (dp1[i] <= 1000) {
                    masks[dp1[i]].push_back(i);
                }
                break;
            }
        }
    }

//    for (int i = 0; i < 20; ++i) {
//        cout << i << ": ";
//        for (int j = 0; j < masks[i].size(); ++j) {
//            cout << bitset<10>(masks[i][j]) << ' ';
//        }
//        cout << '\n';
//    }

    vector<bool> dp2(1 << m, true);
    for (int i = 0; i < n; ++i) {
        auto& vm = masks[a[i]];
        for (int k = 0; k < (1 << m); ++k) {
            if (!dp2[k]) continue;
            bool match = false;
            for (int j = 0; j < vm.size(); ++j) {
                if ((k ^ vm[j]) == 0) {
                    match = true;
                }
            }
            dp2[k] = match;
        }
    }
    for (int i = 0; i < 50; ++i) {
        cout << bitset<10>(i) << ' ' << dp2[i] << '\n';
    }

    for (int i = 0; i < (1 << m); ++i) {
        if (dp2[i]) {
            cout << "YES";
            return 0;
        }
    }
    cout << "NO";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:49:28: warning: comparison of integer expressions of different signedness: 'uint32_t' {aka 'unsigned int'} and 'int' [-Wsign-compare]
   49 |     for (uint32_t i = 1; i < (1 << m); ++i) {
      |                          ~~^~~~~~~~~~
bank.cpp:75:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<unsigned int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |             for (int j = 0; j < vm.size(); ++j) {
      |                             ~~^~~~~~~~~~~
bank.cpp: In function 'void fileio(const string&)':
bank.cpp:31:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     freopen((name + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen((name + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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