Submission #640820

#	Time	Username	Problem	Language	Result	Execution time	Memory
640820		phoenix	Bank (IZhO14_bank)	C++17	0 / 100	2 ms	340 KiB

bank

#include<bits/stdc++.h>

using namespace std;

const int N = 20; const int M = 14;

int n, m;
int a[ N ], b[ M ];
int w[(1 << M)], dp[(1 << M)];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    freopen("stdin", "r", stdin);
    freopen("stdout", "w", stdout);
    cin >> n >> m;
    for(int i = 0;i < n;i++) 
        cin >> a[ i ];
    for(int i = 0;i < m;i++) 
        cin >> b[ i ];
    for(int msk = 1;msk < (1 << m);msk++) 
        for(int i = 0;i < m;i++) 
            if(msk & (1 << i)) 
                w[ msk ] += b[ i ];

    for(int msk = 1;msk < (1 << m);msk++) {
        for(int m = msk;m > 0;m = msk & (m - 1)) {
            dp[ msk ] = max(dp[ msk ], dp[(msk ^ m)] + (w[ m ] == a[ dp[(msk ^ m)] ]));
        }
    }
    cout << (dp[ (1 << m) - 1 ] == n ? "YES\n" : "NO\n");
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:14:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     freopen("stdin", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bank.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen("stdout", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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