Submission #1149318

#	Time	Username	Problem	Language	Result	Execution time	Memory
1149318		ReLice	Sure Bet (CEOI17_sure)	C++20	100 / 100	79 ms	6472 KiB

sure

#include <bits/stdc++.h>
#define ll long long
#define str string
#define ins insert
#define ld long double
#define pb push_back
#define pf push_front
#define pof pop_front()
#define pob pop_back()
#define lb lower_bound
#define ub upper_bound
#define endl "\n"
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define sz size()
#define vll vector<ll>
#define bc back()
#define arr array
#define pll vector<pair<ll,ll>>
using namespace std;/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<ll, null_type,less_equal<ll>, rb_tree_tag,tree_order_statistics_node_update>*/
template<class S,class T>
bool chmin(S &a,const T &b) {
	return a>b?(a=b)==b:false;
}
template<class S,class T>
bool chmax(S &a,const T &b) {
	return a<b?(a=b)==b:false;
}
//void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
void start(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
const ll inf=1e18;
const ld mod=1e10;
const ll N=1e5+5;
const ld eps=1e-6;
ld pr1[N],pr2[N];
void solve(){
    ll i,j;
    ll n;
    cin>>n;
    vector<ld> a(n),b(n);
    for(i=0;i<n;i++) cin>>a[i]>>b[i];
    sort(rall(a));
    sort(rall(b));
    while(a.sz && a.bc<=1)a.pob;
    while(b.sz && b.bc<=1)b.pob;
    pr1[0]=pr2[0]=0;
    for(i=1;i<=a.sz;i++) pr1[i]=pr1[i-1]+a[i-1];
    for(i=1;i<=b.sz;i++) pr2[i]=pr2[i-1]+b[i-1];
    ld l=0,r=mod;
    while(l+eps<r){
        ld mid=(l+r)/2;
        i=0,j=0;
        while(i<=a.sz && j<=b.sz){
            if(pr1[i]-i-j>=mid && pr2[j]-i-j>=mid)break;
            if(pr1[i]<pr2[j])i++;
            else j++;
        }
        if(i>a.sz || j>b.sz)r=mid;
        else l=mid;
    }
    cout<<fixed<<setprecision(4)<<l<<endl;
}

signed main(){
	start();
    ll t=1;
    //cin>>t;
    while(t--) solve();
    return 0;
}
/*





*/

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