Submission #848007

#	Time	Username	Problem	Language	Result	Execution time	Memory
848007		_hbk06	Bank (IZhO14_bank)	C++14	0 / 100	0 ms	344 KiB

bank

#include<bits/stdc++.h>

using namespace std;

const int mxN = 5e5 + 5;
#define int long long
#define MASK(n) (1 << (n))
#define BIT(mask,x) ((mask >> x) & 1)
const long long infll = 1e18 + 69;

int n;
int m;
int a[20];
int b[20];
int s[MASK(20)];
bool dp[MASK(20)][20];

signed main () {
    freopen("bank.in","r",stdin);
    freopen("bank.out","w",stdout);
    cin >> n >> m;
    for (int i = 1; i <= n; i++) cin >> a[i];
    for (int i = 0; i < m; i++) cin >> b[i];
    for (int mask = 0; mask < MASK(m); mask++)
        for (int j = 0; j < m; j++) if(BIT(mask,j)) s[mask] += b[j];
    dp[0][0] = 1;
    for (int mask = 0; mask < MASK(m); mask++)
    for (int sub = mask; sub; sub = (sub - 1) & mask)
    for (int i = 1; i <= n; i++) {
        if(s[sub] == a[i] && dp[mask ^ sub][i - 1]) dp[mask][i] = true;
    }
    bool kt = false;
    for (int mask = 0; mask < MASK(m); mask++) if(dp[mask][n]) {kt = true;break;}
    if(kt) cout << "YES" << "\n";
    else cout << "NO" << "\n";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen("bank.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bank.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen("bank.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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