Submission #906660

#	Time	Username	Problem	Language	Result	Execution time	Memory
906660		zhasyn	Bank (IZhO14_bank)	C++14	71 / 100	1044 ms	6852 KiB

bank

#include <bits/stdc++.h>
#define pb push_back
#define pf push_front
using namespace std;
#define F first
#define S second
typedef long long ll;
#define pii pair <int, int>
#define pll pair <ll, ll>
typedef long double ld;
const ll N = 1e6 + 1e5 + 10;
const ll mod = 998244353;

ll um(ll a, ll b){
	return ((1LL * a * b) % mod + mod) % mod;
}
ll subr(ll a, ll b){
	return ((1LL * a - b) % mod + mod) % mod;
}
int a[N], b[N], n, m;
bool dp[N], base[N], nw[N];
void find(int mask, int index, int sum){
	if(index == m){
		if(dp[sum] == false) return;
		if((mask ^ sum) == (mask | sum)) nw[sum | mask] = true;
		return;
	}
	if((mask & (1 << index)) == 0){
		find(mask, index + 1, sum + (1 << index));
	}
	find(mask, index + 1, sum);
}
void subtask1(){
	dp[0] = true;
  	for(int i = 0; i < m; i++){
  		for(int j = a[0]; j >= b[i]; j--){
  			dp[j] |= dp[j - b[i]];
  		}
  	}
  	if(dp[a[0]]) cout << "YES";
  	else cout << "NO";
}
void subtask2(){
	base[0] = 1;
  	for(int i = 0; i < n; i++){
  		for(int mask = 0; mask < (1 << m); mask++){
  			int hs = 0;
  			for(int dig = 0; dig < m; dig++){
  				if((mask & (1 << dig)) > 0) hs += b[dig];
  			}
  			if(hs == a[i]) dp[mask] = true;
  		}
  		for(int mask = 0; mask < (1 << m); mask++){
  			if(!base[mask]) continue;
  			find(mask, 0, 0);
  		}
  		for(int j = 0; j < (1 << m); j++){
  			base[j] = nw[j];
  			nw[j] = false;
  			dp[j] = false;
  		}
  	}
  	bool can = false;
  	for(int i = 0; i < (1 << m); i++){
  		if(base[i]) can = true;
  	}
  	if(can) cout << "YES\n";
  	else cout << "NO\n";
}
int main() {
	ios::sync_with_stdio(false);
  	cin.tie(NULL);
  	//freopen("bank.in", "r", stdin);
  	//freopen("bank.out", "w", stdout);
  	cin >> n >> m;
  	for(int i = 0; i < n; i++){
  		cin >> a[i];
  	}
  	for(int i = 0; i < m; i++){
  		cin >> b[i];
  	}
  	if(m < n){
  		cout << "NO";
  		return 0;
  	}
  	if(n == 1){
  		subtask1();
  	} else{
  		subtask2();
  	}
  return 0;
}

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