Submission #640439

#	Time	Username	Problem	Language	Result	Execution time	Memory
640439		gnhmhp	Bank (IZhO14_bank)	C++14	71 / 100	1064 ms	124504 KiB

bank

#define taskname "bank."
#include <bits/stdc++.h>
#define fastio ios_base::sync_with_stdio(false); cin.tie(nullptr);
using namespace std;

int n, m;
int a[20], b[20], sum[20], s[1<<20];
bool c[1<<20][21];
vector<int> v[1<<20];

void upd(int i, int j)
{
    if (c[i][j]) return;
    c[i][j]=true;
    for (auto x : v[i])
        upd((i|(1<<x)), j);
}
int main()
{
    fastio;
    cin >> n >> m;
    for (int i=0; i<n; ++i)
    {
        cin >> a[i];
        if (i>0) sum[i]=sum[i-1];
        sum[i]+=a[i];
    }
    for (int j=0; j<m; ++j) cin >> b[j];
    for (int i=0; i<(1<<m); ++i)
        for (int j=0; j<m; ++j)
            if (i & (1<<j)) s[i]+=b[j];
            else v[i].push_back(j);
    upd(0,0);
    for (int i=0; i<n; ++i)
    {
        for (int j=0; j<(1<<m); ++j)
        {
            int x=0;
            if (i>0) x=sum[i-1];
            if (c[j][i] && s[j]-x==a[i]) upd(j, i+1);
            else c[j][i]=false;
        }
    }
    for (int j=0; j<(1<<m); ++j)
    {
        if (c[j][n])
        {
            cout << "YES\n";
            return 0;
        }
    }
    cout << "NO\n";
}

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