Submission #477925

#	Time	Username	Problem	Language	Result	Execution time	Memory
477925		BackNoob	Bank (IZhO14_bank)	C++14	0 / 100	869 ms	368 KiB

bank

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define endl '\n'
#define mask(i) (1LL << (i))
#define task "name"
#define ull unsigned long long
using namespace std;
const ll mxN = 220797 + 7;
const ll inf = 1e9 + 277;
const ll mod = 2147483648;
const ll infll = 1e18 + 7;
const ll base = 307;
 
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;
}
 
int a[mxN] , b[mxN] , c[mxN];
int dp[(1 << 20) + 7][22];

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    freopen("bank.in" , "r" , stdin);
    freopen("bank.out" , "w" , stdout);
    
    int n , m;
    cin >> n >> m;
    for(int i = 1 ; i <= n ; i++) cin >> a[i];
    for(int i = 1 ; i <= m ; i++) cin >> b[i];

	queue<pair<int , int>> q;
	for(int mask = 0 ; mask < (1 << m) ; mask++) {
		int s = 0;
		for(int i = 0 ; i < m ; i++) {
			if(mask & (1 << i)) s += b[i + 1];
		}
		if(s == a[1]) q.push({mask , 2});
	}
	while(!q.empty()) {
		pair<int , int> u = q.front();
		q.pop();
		if(u.se == n + 1) {
			cout << "YES";
			return 0;
		}

		int cnt = 0;
		for(int i = 0 ; i < m ; i++) {
			if(!(u.fi & (1 << i))) {
				c[cnt] = i;
				++cnt;
			}
		}

		for(int mask = 0 ; mask < (1 << cnt) ; mask++) {
			int s = 0;
			int submask = 0;
			for(int i = 0 ; i < cnt ; i++) {
				if(mask & (1 << i)) {
					submask |= (1 << c[i]);
					s += b[c[i] + 1];
				}
			}
			if(s == a[u.se]) q.push({u.fi | submask , u.se + 1});
		}
	}
	cout << "NO";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:31:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     freopen("bank.in" , "r" , stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen("bank.out" , "w" , stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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