Submission #937256

#	Time	Username	Problem	Language	Result	Execution time	Memory
937256		Litusiano	Gym Badges (NOI22_gymbadges)	C++17	0 / 100	2053 ms	8280 KiB

Main

// #pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math,inline")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,lzcnt,mmx,abm,avx,avx2,fma")
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int inf = 1e18;
mt19937 rng((unsigned int) chrono::steady_clock::now().time_since_epoch().count());

bool cmp(pair<int,int> a, pair<int,int> b){
	return a.second-a.first > b.second-b.first;
}

void shuffle(vector<pair<int,int>>& v){
	int n = v.size();
	for(int i = 0; i<3*n; i++){
		int a = rng()%n; int b = rng()%n;
		swap(v[a],v[b]);
	}

}

signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int n; cin>>n;
	vector<pair<int,int>> v(n); for(auto& i : v) cin>>i.first;
	for(auto& i :v) cin>>i.second;
	// sort(v.begin(),v.end(),cmp);
	// for(auto x : v) cout<<x.first<<" "<<x.second<<endl;
	if(n > 5000){
		int s = 0;
		int ans = 0;
		for(int i = 0; i<n; i++){
			if(s <= v[i].second){
				s+=v[i].first; ans++;
			}
		}
		cout<<ans<<endl; return 0;
	}
	int mx = 0;
	int MAXN = 2e8;
	MAXN/=(n*n);
	for(int _ = 0; _<MAXN; _++){
		shuffle(v);
		vector<vector<int>> dp(n+1, vector<int>(n+1,inf));
		dp[0][0] = 0;
		for(int i = 1; i<=n; i++){
			for(int j = 0; j<=n; j++){
				dp[i][j] = dp[i-1][j];
				// take i
				if(!j) continue;
	 			int act = dp[i-1][j-1];
				if(act <= v[i-1].second) act+=v[i-1].first;
				else continue;
				dp[i][j] = min(dp[i][j],act);
				// cerr<<i<<" "<<j<<" "<<dp[i-1][j-1]<<" "<<v[i-1].second<<" "<<v[i-1].first<<"  "<<dp[i][j]<<endl;
			}
		}
		for(int i = 0; i<=n; i++){
			// cout<<dp[n][i]<<" ";
			if(dp[n][i] != inf) mx = max(mx,i);
		}
	}
	cout<<mx<<endl;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 9
• Subtask 3: 0 / 27
• Subtask 4: 0 / 49