Submission #1306407

#	Time	Username	Problem	Language	Result	Execution time	Memory
1306407		vtnoo	Let's Win the Election (JOI22_ho_t3)	C++20	10 / 100	5 ms	356 KiB

Main

#include <bits/stdc++.h>
#define pb push_back
#define fst first
#define snd second
#define fore(i,a,b) for(int i=a,pao=b;i<pao;++i)
#define SZ(x) ((int)x.size())
#define ALL(x) x.begin(),x.end()
#define mset(a,v) memset((a),(v),sizeof(a))
#define FIN ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
using namespace std;
typedef long long ll;
const int MAXN=505,INF=1e9;
int A[MAXN],B[MAXN];
int main(){FIN;
	int n,k;cin>>n>>k;
	vector<pair<int,int>>b;
	vector<int>a;
	fore(i,0,n){
		cin>>A[i]>>B[i];
		if(B[i]!=-1)b.pb({B[i],i});
		else a.pb(A[i]);
	}
	double ans=INF;
	sort(ALL(b));
	fore(i,0,SZ(b)+1){
		double tot=0,d=1;
		int cnt=0;
		fore(j,0,i){
			tot+=(double)b[j].fst/d;
			d++;
			cnt++;
		}
		vector<int>c;
		fore(j,i,SZ(b)){
			c.pb(A[b[j].snd]);
		}
		fore(i,0,SZ(a)){
			c.pb(a[i]);
		}
		sort(ALL(c));
		fore(j,0,k-cnt){
			tot+=(double)c[j]/d;
		}
		ans=min(ans,tot);
	}
	cout<<fixed<<setprecision(20)<<ans<<endl;
}

• 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