Submission #593399

#	Time	Username	Problem	Language	Result	Execution time	Memory
593399		vbee	Bank (IZhO14_bank)	C++14	19 / 100	167 ms	1444 KiB

bank

#include <bits/stdc++.h>
#define fi first
#define se second
#define all(r) (r).begin(), (r).end()
#define MASK(i) (1 << (i))
#define BIT(x, i) ((x) >> (i) & 1)
#define ll long long
#define pb push_back
#define TASK "task"

using namespace std;

template <typename T1, typename T2> bool minimize(T1 &a, T2 b){ if (a > b) {a = b; return true;} return false;}
template <typename T1, typename T2> bool maximize(T1 &a, T2 b){if (a < b) {a = b; return true;} return false;}

const int oo = 1e9 + 7;
const ll loo = (ll)1e18 + 7;
const int LOG = 18;
const int BASE = 323;
const int N = 20;

int n, m, a[N], b[N];
bool f[MASK(N)];
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    // freopen(TASK".inp", "r", stdin);
    // freopen(TASK".out", "w", stdout);
    cin >> n >> m;
    int totsum = 0;
    for (int i = 0; i < n; i++) cin >> a[i], totsum += a[i];
    for (int i = 0; i < m; i++) cin >> b[i];

    f[0] = true;
    for (int mask = 0; mask < MASK(m); mask++) if (f[mask]){
        int sum = 0;
        for (int i = 0; i < m; i++) if (BIT(mask, i)) sum += b[i];
        int cur = 0;
        for (int i = 0; i < n; i++){
            if (sum > a[i]) sum -= a[i], cur = i;
            else break;
        }
        for (int i = 0; i < m; i++) if (BIT(mask, i) == 0){
            if (sum == 0) f[mask ^ MASK(i)] = true;
            else if (a[cur] - sum >= b[i]) f[mask ^ MASK(i)] = true; 
        }
    }

    for (int mask = 0; mask < MASK(m); mask++) if (f[mask]){
        int sum = 0;
        for (int i = 0; i < m; i++) if (BIT(mask, i)) sum += b[i];
        if (sum == totsum) return cout << "YES\n", 0;
    }
    cout << "NO\n";
    return 0;
}

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