Submission #566168

#	Time	Username	Problem	Language	Result	Execution time	Memory
566168		LeonaRaging	Bank (IZhO14_bank)	C++14	100 / 100	113 ms	8524 KiB

bank

#include <bits/stdc++.h>
#define fi first
#define se second
#define ll long long
using namespace std;
const ll mod = 1e9 + 7;
const int N = 20;
const int maxn = 1e5 + 4;
const int INF = 1e9;

int n, m, people[N], banknote[N], people_covered[1 << N], leftover[1 << N];

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    //freopen(".INP", "r", stdin);
    //freopen(".OUT", "w", stdout);
    cin >> n >> m;
    for (int i = 0; i < n; i++) cin >> people[i];
    for (int i = 0; i < m; i++) cin >> banknote[i];
    memset(people_covered, -1, sizeof people_covered);
    memset(leftover, -1, sizeof leftover);
    leftover[0] = people_covered[0] = 0;
    for (int s = 0; s < (1 << m); s++)
    {
        for (int last = 0; last < m; last++)
        {
            if ((s & (1 << last)) == 0) continue;
            int prev = s ^ (1 << last);
            if (people_covered[prev] == -1) continue;
            int new_salary = leftover[prev] + banknote[last];
            int cur_salary = people[people_covered[prev]];
            if (new_salary < cur_salary)
            {
                people_covered[s] = people_covered[prev];
                leftover[s] = new_salary;
            }
            else if (new_salary == cur_salary)
            {
                people_covered[s] = people_covered[prev] + 1;
                leftover[s] = 0;
            }
        }
        if (people_covered[s] == n)
        {
           cout << "YES";
           return 0;
        }
    }
    cout << "NO";
}

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