Submission #671868

#	Time	Username	Problem	Language	Result	Execution time	Memory
671868		Baytoro	Bank (IZhO14_bank)	C++17	100 / 100	201 ms	16820 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=1e18,mod=1e9+7;
int n,m;
void get(int x){
	for(int i=0;i<m;i++)
		cout<<((x&(1<<i))?1:0);
	cout<<endl;
}
int dp[(1<<20)+5],ok[(1<<20)+5],sum[(1<<20)+5];
void build(vector<int> a, vector<int> b){
	for(int i=1;i<(1<<m);i++){
		for(int j=0;j<m;j++){
			if(i&(1<<j))
				sum[i]=sum[(i^(1<<j))]+b[j];
		}
	}
}
int pref[25];
void f(int x,int id){
	for(int i=0;i<m;i++){
		if(id!=-1 && sum[(x|(1<<i))]<=pref[id])
			ok[(x|(1<<i))]=1;
		if(id==-1)
			ok[(x|(1<<i))]=1;
	}
}
void solve(){
	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];
	build(a,b);
	pref[0]=a[0];
	for(int i=1;i<n;i++)
		pref[i]=a[i]+pref[i-1];
	f(0,0);
	for(int i=0;i<n;i++){
		for(int mask=1;mask<(1<<m);mask++){
			if(sum[mask]>pref[i] || (i>0 && sum[mask]<pref[i-1])) continue;
			if(!ok[mask]) continue;
			/*if(i==1)
				get(mask);*/
			f(mask,i);
			if(sum[mask]==pref[i]){
				if(i==n-1){
					cout<<"YES\n";
					return;
				}
			}
			/*for(int j=0;j<m;j++){
				if(mask&(1<<j)){
					if(ok[mask^(1<<j)]<i-1) continue;
					dp[mask]=(dp[mask^(1<<j)])+b[j];
					if(dp[mask]>a[i]) continue;
					ok[mask]=i-1;
					if(dp[mask]==a[i]){
						dp[mask]=0;
						ok[mask]=i;
						//get(mask);
						if(i==n-1){
							cout<<"YES\n";
							return;
						}
					}
					break;
				}
			}*/
		}
	}
	cout<<"NO\n";
	
}
main(){
	ios;
	int T=1;
	//cin>>T;
	while(T--){
		solve();
	}
}

Compilation message (stderr)

bank.cpp:86:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   86 | 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: 27 / 27
• Subtask 4: 29 / 29