Submission #346723

#	Time	Username	Problem	Language	Result	Execution time	Memory
346723		knightron0	Bank (IZhO14_bank)	C++14	100 / 100	714 ms	175852 KiB

bank

#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define fr first
#define sc second
#define clr(a) memset(a, 0, sizeof(a))
#define sz(x) x.size()
#define printvector(arr) for (auto it = arr.begin(); it != arr.end(); ++it) cout<<*it<<" "; cout<<endl;
#define REP(i, n) for (int i = 0; i < n; i++)
#define FOR(i, x, y) for (int i = x; i < y; i++)
#define DEC(i, x, y) for (int i = x; i >= y; i--)
#define all(v) v.begin(), v.end()
#define min3(a, b, c) min(a, min(b, c))
#define max3(a, b, c) max(a, max(b, c))
#define alla(a, n) a, a + n
#define gcd(a, b) __gcd(a, b)
#define lcm(a, b) (a * b)/gcd(a, b)
#define int long long int
#define ull unsigned long long
#define printarray(arr, n) for(int i= 0;i<n;i++) cout<<arr[i]<<' '; cout<<endl;
#define printvecpairs(vec) for(auto it: vec) cout<<it.fr<<' '<<it.sc<<endl;
#define initdp(a) memset(a, -1, sizeof(a));
#define endl '\n'
#define float long double
 
using namespace std;
const int MOD = 1e9 + 7;
const int INF = 2e15;
const int MAXN = 20;
 
int fastexpo(int b, int exp){
    if(exp == 0) return 1;
    if(exp == 1) return b;
    int ans = (fastexpo(b,exp/2) % MOD);
    ans *= ans;
    ans %= MOD;
    if(exp % 2 == 1){
        ans *= b;
    }
    ans %= MOD;
    return ans;
}
 
int a[MAXN], b[MAXN];
int n, m;
vector<int> poss[1006];
int dp[MAXN][(1LL<<MAXN)];
 
bool solve(int idx, int mask){
	if(idx == n) return 1;
	if(dp[idx][mask] != -1){
		if(dp[idx][mask] == 0) return 0;
		else return 1;
	}
	bool ans = 0;
	for(auto mask2: poss[a[idx]]){
		if((mask2&mask) == 0){
			ans |= solve(idx+1, mask2|mask);
		}
	}
	if(ans) dp[idx][mask] = 1;
	else dp[idx][mask] = 0;
	return ans;
}
 
signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    initdp(dp);
    cin>>n>>m;
    int mx = 0;
    for(int i= 0;i<n;i++){
    	cin>>a[i];
    	mx = max(mx, a[i]);
    }
    for(int i = 0;i<m;i++){
    	cin>>b[i];
    }
    for(int mask = 0;mask<(1LL<<m);mask++){
    	int sum =0;
    	for(int i = 0;i<m;i++){
    		if((1LL<<i) & mask){
				sum += b[i];
    		}
    	}
    	if(sum <= mx) poss[sum].pb(mask);
    }
    if(solve(0, 0)){
    	cout<<"YES"<<endl;
    } else {
    	cout<<"NO"<<endl;
    }
    return 0;
}
 
 
 
 
 

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