Submission #1272539

#	Time	Username	Problem	Language	Result	Execution time	Memory
1272539		kiteyu	Bank (IZhO14_bank)	C++20	0 / 100	1 ms	640 KiB

bank

#include<bits/stdc++.h>
using namespace std;
using ll=long long;
const int N=20;
int n,m,a[N+5],b[N+5],d[N+5],qe[N+5][(1<<N)];
bool f[(1<<N)];
vector<int>g[N+5];

int main(){
    freopen("bank.in","r",stdin);
    freopen("bank.out","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 i=0;i<n;++i){
        for(int mask=1;mask<(1<<m);++mask){
            int s=0;
            for(int j=0;j<m;++j)
                if(((mask>>j)&1)) s+=b[i];
            if(s==a[i])g[i].push_back(mask);
        }
    }
    qe[0][d[0]++]=0;
    for(int i=0;i<n;++i){
        memset(f,0,sizeof(f));
        for(int j=0;j<d[i];++j){
            for(int mask:g[i])
                if(!(qe[i][j]&mask)&&!f[qe[i][j]^mask]){
                    f[qe[i][j]^mask]=1;
                    qe[i+1][d[i+1]++]=1;
                    if(i==n-1) return cout<<"YES",0;
                }
        }
    }
    cout<<"NO";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:10:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     freopen("bank.in","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bank.cpp:11:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     freopen("bank.out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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