Submission #671851

#	Time	Username	Problem	Language	Result	Execution time	Memory
671851		Baytoro	Bank (IZhO14_bank)	C++17	44 / 100	76 ms	16976 KiB

bank

#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define int long long
#define endl '\n'
void fopn(string name){
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
const int INF=1e9,mod=1e9+7;
int dp[(1ll<<20)+5],ok[(1ll<<20)+5];
void get(int x){
	for(int i=0;i<20;i++)
		cout<<((x&(1<<i))?1:0);
	cout<<endl;
}
set<int> f(vector<int> a, vector<int> b){
	int n=a.size();
	int m=b.size();
	set<int> ans;
	dp[0]=0;
	for(int i=0;i<n;i++){
		for(int mask=1;mask<(1<<(m-1));mask++){
			for(int j=0;j<m;j++){
				if(mask&(1<<j)){
					if(ok[mask^(1<<j)]!=i-1) continue;
					if((dp[mask^(1<<j)])+b[j]>a[i]) continue;
					dp[mask]=(dp[mask^(1<<j)])+b[j];
					ok[mask]=i-1;
					//cout<<(1<<m)<<' ';
					//cout<<mask<<endl;
					if(dp[mask]==a[i]){
						dp[mask]=0;
						ok[mask]=i;
						if(i==n-1){
							//get(mask);
							ans.insert(mask);
						}
					}
					break;
				}
			}
		}
	}
	return ans;
}
int n,m;
void solve(){
	memset(ok,-1,sizeof(ok));
	memset(dp,0x3f3f3f3f,sizeof(dp));
	cin>>n>>m;
	vector<int> a(n+1),b(m+1);
	for(int i=0;i<n;i++) cin>>a[i];
	for(int i=0;i<m;i++) cin>>b[i];
	vector<int> tmp;
	for(int i=0;i<n/2;i++) 
		tmp.pb(a[i]);
	set<int> ans1=f(tmp,b);
	tmp.clear();
	for(int i=n/2;i<n;i++)
		tmp.pb(a[i]);
	memset(ok,-1,sizeof(ok));
	memset(dp,0x3f3f3f3f,sizeof(dp));
	set<int> ans2=f(tmp,b);
	//cout<<ans2.size()<<endl;
	if(ans1.size()==0){
		if(ans2.size()>0){
			cout<<"YES\n";
			return;
		}
		cout<<"NO\n";
		return;
	}
	for(auto i: ans1){
		if(ans2.size()==0) continue;
		for(auto j: ans2){
			if(!(i&j)){
				cout<<"YES\n";
				return;
			}
		}
	}
	cout<<"NO\n";
	
}
main(){
	ios;
	int T=1;
	//cin>>T;
	while(T--){
		solve();
	}
}

Compilation message (stderr)

bank.cpp:91:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   91 | main(){
      | ^~~~
bank.cpp: In function 'void fopn(std::string)':
bank.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:13:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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