Submission #948820

#	Time	Username	Problem	Language	Result	Execution time	Memory
948820		tnknguyen_	Bank (IZhO14_bank)	C++14	46 / 100	3 ms	20828 KiB

bank

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n' 
#define MASK(k) (1LL<<k)

int n, m;
int a[30], b[30];

// ------------ SUBTASKS ------------
namespace SUB1{
    bool ok(){
        return (n == 1);
    }

    void solve(){
        vector<int> f(1e3+5, 0);    
        f[0] = 1;
        for(int i=1; i<=m; ++i){
            for(int j=a[1]; j>=b[i]; --j){
                f[j] |= f[j - b[i]];
            }
        }

        cout<<(f[a[1]] ? "YES" : "NO");
        
        //-----------------------------
        exit(0);
    }
}

vector<int> v[21];
int f[21][MASK(21)];
namespace SUB2{
    void solve(){
        for(int i=0; i<MASK(m); ++i){
            int sum = 0;
            for(int j=i; j!=0; j-=(j&-j)){
                sum += b[__lg((j&-j)) + 1];
            }
            for(int j=1; j<=n; ++j){
                if(a[j] == sum){
                    v[j].push_back(i);
                }
            }
        }

        v[0].push_back(0);
        int fl = 1;
        for(int i=1; i<=n; ++i){
            int b = 0;
            for(int x : v[i]){
                for(int y : v[i-1]){
                    if((x & y) == 0){
                        f[i][x | y] = 1;
                        b = 1;
                    }
                }
            }
            if(!b){
                fl = 0;
                break;
            }
        }
        cout<<(fl ? "YES" : "NO");
        //-----------------------------
        exit(0);
    }
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

//    freopen("main.inp","r",stdin);
//    freopen("main.out","w",stdout);

    //f[mask][i] = 
    cin>>n>>m;
    for(int i=1; i<=n; ++i){
        cin>>a[i];
    }
    for(int j=1; j<=m; ++j){
        cin>>b[j];
    }

    if(SUB1::ok()){
        SUB1::solve();
    }
    SUB2::solve();

    return 0;
}

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