Submission #1014741

#	Time	Username	Problem	Language	Result	Execution time	Memory
1014741		Thunnus	Bank (IZhO14_bank)	C++17	100 / 100	89 ms	16888 KiB

bank

#include<bits/stdc++.h>
using namespace std;
using i64 = long long;
#define int i64
#define vi vector<int>
#define vvi vector<vi>
#define vb vector<bool>
#define pii pair<int, int>
#define fi first
#define se second
#define sz(x) (int)(x).size()

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    int n, m;
    cin >> n >> m;
    vi a(n), b(m);
    for(int &i : a)
        cin >> i;
    for(int &i : b)
        cin >> i;
    
    vi leftover(1 << m, -1), covered(1 << m, -1);
    leftover[0] = covered[0] = 0;
    for(int i = 0; i < (1 << m); i++){
        for(int last = 0; last < m; last++){
            int prev = i ^ (1 << last);
            if(!(i & (1 << last)) || covered[prev] == -1) continue;
            int new_amt = leftover[prev] + b[last], cur_target = a[covered[prev]];
            if(new_amt < cur_target){
                covered[i] = covered[prev];
                leftover[i] = new_amt;
            }
            else if(new_amt == cur_target){
                covered[i] = covered[prev] + 1;
                leftover[i] = 0;
            }
        }
        if(covered[i] == n){
            cout << "YES"; return 0;
        }
    }
    cout << "NO";
	return 0;
}

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