Submission #1001495

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001495		nathan4690	Bank (IZhO14_bank)	C++14	100 / 100	87 ms	16876 KiB

bank

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define el cout << '\n'
#define f1(i,n) for(ll i=1;i<=n;i++)
#define __file_name ""
using namespace std;
const ll maxn = 22, inf=1e18;

ll n,m,a[maxn],b[maxn],dp[(1 << 21) + 10], sum[(1 << 21) + 10];
bool nxt[(1 << 21) + 10];

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

    if(fopen(__file_name ".inp", "r")){
        freopen(__file_name ".inp","r",stdin);
        freopen(__file_name ".out","w",stdout);
    }
    // code here
    cin >> n >> m;
    f1(i,n) cin >> a[i];
    f1(i,m) cin >> b[i];
    for(ll mask=0;mask<(1 << m);mask++){
        dp[mask] = -inf;
        sum[mask] = -inf;
    }
    dp[0] = 0;
    sum[0] = 0;
    for(ll mask=0;mask<(1 << m);mask++){
        for(ll j=0;j<m;j++){
            if(mask & (1 << j)){
                if(sum[mask ^ (1 << j)] + b[j+1] == a[dp[mask ^ (1 << j)] + 1]){
                    if(dp[mask] < dp[mask ^ (1 << j)] + 1){
                        dp[mask] = dp[mask ^ (1 << j)] + 1;
                        sum[mask] = 0;
                    }
                }else{
                    if(dp[mask] < dp[mask ^ (1 << j)]){
                        dp[mask] = dp[mask ^ (1 << j)];
                        sum[mask] = sum[mask ^ (1 << j)] + b[j+1];
                    }
                }
            }
        }
    }
    if(*max_element(dp, dp+(1 << m)) == n) cout << "YES";
    else cout << "NO";
    /*
    f1(i,n){
        for(ll mask = 0;mask<(1 << m);mask++){
            if(sum[mask] == a[i]){
                nxt[mask] = 1;
                continue;
            }
            for(ll j=0;j<m;j++){
                if(mask & (1 << j)){
                    nxt[mask] |= nxt[mask ^ (1 << j)];
                }
            }
        }
        for(ll mask=0;mask<(1 << m);mask++){
            dp[mask] = dp[mask] + nxt[mask];
            nxt[mask] = 0;
        }
    }
    for(ll mask=0;mask<(1 << m);mask++){
        if(dp[mask] == n){
            cout << "YES";
            return 0;
        }
    }
    cout << "NO";
    */
    return 0;
}

/*
Code by: Nguyen Viet Trung Nhan
Cau Giay Secondary School
*/

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen(__file_name ".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen(__file_name ".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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