Submission #1136358

#	Time	Username	Problem	Language	Result	Execution time	Memory
1136358		classic	Bank (IZhO14_bank)	C++20	0 / 100	36 ms	24388 KiB

bank

// mode: short code
/*
practicing..
*/
#include<bits/stdc++.h>

int main() {
    freopen("bank.in", "r", stdin);
    freopen("bank.out", "w", stdout);
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    int n, m;
    std::cin >> n >> m;

    std::vector<int> a(n);
    for (int i = 0; i < n; i++) {
        std::cin >> a[i];
    }
    std::vector<int> b(m);
    for (int i = 0; i < m; i++) {
        std::cin >> b[i];
    }

    std::vector<int> cnt(1 << m, -1), rem(1 << m, -1);
    cnt[0] = 0;
    rem[0] = 0;
    for (int i = 1; i < (1 << m); i++) {
        for (int j = 0; j < m; j++) {
            if (!(i & (1 << j))) {
                continue;
            }

            int p = (i ^ (1 << j));
            if (cnt[p] == -1) {
                continue;
            }

            int nxt = rem[p] + b[j];
            int need = a[cnt[p]];

            if (nxt < need) {
                cnt[i] = cnt[p];
                rem[i] = nxt;
            } else if (nxt == need) {
                cnt[i] = cnt[p] + 1;
                rem[i] = 0;
            }
        }

        if (cnt[i] == n) {
            std::cout << "YES";
            return 0;
        }
    }

    std::cout << "NO";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:8:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     freopen("bank.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:9:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     freopen("bank.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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