Submission #1295410

#	Time	Username	Problem	Language	Result	Execution time	Memory
1295410		m.zeeshanrashid	Let's Win the Election (JOI22_ho_t3)	C++20	10 / 100	2 ms	380 KiB

Main

#ifdef __AVX2__
#pragma GCC target "avx2"
#endif
#pragma GCC optimize "O3"
#pragma GCC optimize "unroll-loops"
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp> 
using namespace __gnu_pbds; 
using namespace std;
#define int long long
#define elif else if
#define all(l) begin(l),end(l)
#define rall(l) rbegin(l),rend(l)
#define append push_back
#define print(l) for(auto i:l) cout<<i<<' '; cout<<endl;
#define pprint(a,b) cout<<a<<' '<<b<<endl;
#define inp(l) for(auto &i:l) cin>>i;
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
#define pai make_pair
#define endl "\n"
#define pii pair<int,int>
#define fi first
#define se second
#define vec vector

// const int mod=998244353;
const int mod1=998244353;
const int mod=1e9+7;
const int N=2e5+5;

int iter=1,itera=1;
void solve(){
	int n,k;
	cin>>n>>k;
	vec<int>a(n),b(n);
	int cn=0;
	for(int i=0;i<n;i++){
		cin>>a[i]>>b[i];
		if(b[i]>=0) cn++;
	}
	vec<pii>b1,a1;
	for(int i=0;i<n;i++){
		if(b[i]>=0)
		b1.append({b[i],i});
		a1.append({a[i],i});
	}
	sort(all(a1));
	sort(all(b1));
	double ans=1e18;
	for(int c=0;c<=min(k,cn);c++){
		double x=0;
		vec<bool>vis(n,0);
		int col=1,tem=0;
		for(int i=0;i<c;i++){
			x+=(b1[i].fi+.0)/col;
			vis[b1[i].se]=1;
			col++;
			tem++;
		}
		int p=0;
		while(tem<k){
			if(!vis[a1[p].se]){
				tem++;
				x+=(a1[p].fi+.0)/col;
			}
			p++;
		}
		ans=min(ans,x);
	}
	cout<<ans<<endl;
}
signed main(){
	// freopen("","r",stdin);
	// freopen("","w",stdout);
	ios_base::sync_with_stdio(false);
	cin.tie(NULL); 
	cout.tie(NULL);
	cout<<fixed<<setprecision(20);
	// cin>>itera;
	for(iter=1;iter<=itera;iter++) solve();
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 33
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23