Submission #1028363

#	Time	Username	Problem	Language	Result	Execution time	Memory
1028363		vjudge1	Sure Bet (CEOI17_sure)	C++17	100 / 100	94 ms	4600 KiB

sure

#include <bits/stdc++.h>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd pair<ld,ld>
#define fi first
#define se second
#define endl "\n"
#define rep(a,b,c) for(ll a=b; a<c; a++)
#define rep2(a,b,c,d) for(ll a=b; a<c; a+=d)
#define repr(a,b,c) for(ll a=b-1; a>c-1; a--)
#define repa(a,b) for(const auto &a: b)
#define multicase() int t; cin>>t; while(t--)
#define fastIO() ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define valid(c) cout<<(c ? "YES" : "NO")<<endl;
#define valid2(c,a,b) cout<<(c ? a : b)<<endl;
#define ll long long 
#define ld long double 
#define pq_min(a) priority_queue<a, vector<a>, greater<a>>
#define pq_max(a) priority_queue<a>
#define pb push_back

using namespace std;

int main(){
	fastIO();
	cout<<setprecision(4)<<fixed<<endl;
	int n;
	cin>>n;
	ld a[n+5]{}, b[n+5]{}, ans=0;
	int l, r, mid;
	rep(i,1,n+1) cin>>a[i]>>b[i];
	sort(a+1,a+n+1);
	sort(b+1,b+n+1);
	reverse(a+1,a+n+1);
	reverse(b+1,b+n+1);
	rep(i,1,n+1) a[i]+=a[i-1], b[i]+=b[i-1];
	rep(i,1,n+1){
		l=1;
		r=n;
		while(l<=r){
			mid=(l+r)>>1;
			if(b[mid]<=a[i]) l=mid+1;
			else r=mid-1;
		}
		ans=max(ans,max(min(a[i],b[l])-i-l,min(a[i],b[r])-i-r));
	}
	cout<<ans<<endl;
}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40