Submission #1292368

#	Time	Username	Problem	Language	Result	Execution time	Memory
1292368		kam	Bank (IZhO14_bank)	C++20	0 / 100	1 ms	572 KiB

bank

#include<unordered_map>
#include<unordered_set>
#include<algorithm>
#include<iostream>
#include<cstdlib>
#include<iomanip>
#include<cstring>
#include<cassert>
#include<numeric>
#include<vector>
#include<string>
#include<chrono>
#include<random>
#include<stack>
#include<queue>
#include<cmath>
#include<set>
#include<map>
#include<ios>
using namespace std;
int n, m;
vector<int>a, b;
vector<vector<int>>gp;
bool dfs(int id, int vis) {
    if (id == n) return true;
    for (int& x : gp[a[id]]) {
        if ((vis ^ x) == (vis | x)) {
            if (dfs(id + 1, vis | x)) return true;
        }
    }
    return false;
}

void solve()
{
    cin >> n >> m;
    a = vector<int>(n); 
    b = vector<int>(m);
    gp = vector<vector<int>>(1 << m);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int j = 0; j < m; j++) cin >> b[j];
    for (int i = 0; i < (1 << m); i++) {
        int sum = 0;
        for (int j = 0; j < m; j++) {
            if ((1 << j) & i) sum += b[j];
        } 
        gp[sum].push_back(i);
    }
    cout << (dfs(0, 0) ? "YES" : "NO");
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    freopen("bank.in", "r", stdin);
    freopen("bank.out", "w", stdout);

    //signed _; cin >> _; while (_--)
    solve();
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:57:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     freopen("bank.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:58:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |     freopen("bank.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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