Submission #1252405

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252405		Bui_Quoc_Cuong	Bank (IZhO14_bank)	C++20	71 / 100	963 ms	164416 KiB

bank

#include <bits/stdc++.h>
using namespace std;

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

template <class T>
    void clear_dup (vector<T> &a) {
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

typedef long long ll;
typedef pair <int, int> ii;
typedef vector <int> vi;

#define FOR(i, a, b) for(int i = a; i <= (int)b; i++)
#define FORD(i, a, b) for(int i = a; i >= (int)b; i--)
#define MASK(i) (1LL << (i))
#define BIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
const int N = 3e5 + 5;

int n, m;
int a[23], b[23];
vector <int> g[23];
pair <int, int> que[MASK(20) * 20];

void process(void) {
	cin >> n >> m;
	FOR(i, 1, n) cin >> a[i];
	FOR(i, 1, m) cin >> b[i];
	int cnt = 0;
	FOR(mask, 0, MASK(m) - 1) {
		int sum = 0;
		FOR(i, 1, m) if (BIT(mask, i - 1)) sum+= b[i];
		FOR(i, 1, n) if (sum == a[i]) g[i].push_back(mask);
		if (sum == a[1]) que[++ cnt] = {1, mask};
	}
	int it = 1;
	while (it <= cnt) {
		int id = que[it].first, mask = que[it].second;
		it++;
		if (id == n) {
			cout << "YES";
			return;
		}
		for (int &nxt_mask : g[id + 1]) {
			if ((nxt_mask & mask)) continue;
			que[++ cnt] = {id + 1, nxt_mask | mask};
		}
	}	
	cout << "NO";
}

int main(void) {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    #define taskname "kieuoanh"
    if (fopen(taskname".inp", "r")) {
        freopen(taskname".inp", "r", stdin);
        freopen(taskname".out", "w", stdout);
    }

    process();  

    cerr << "\n[Time elapsed] " << clock() << " ms!\n";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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