Submission #1033011

#	Time	Username	Problem	Language	Result	Execution time	Memory
1033011		MarwenElarbi	Sure Bet (CEOI17_sure)	C++17	0 / 100	0 ms	348 KiB

sure

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define fi first
#define se second
#define ll long long
#define pb push_back
#define ii pair<int,int>
template <class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int nax=1e6+5;
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
int main()
{
    optimise;
    int n;
    cin>>n;
    pair<double,double> tab[n+1];
    multiset<pair<double,double>> a;
    multiset<pair<double,double>> b;
    double cnta=0;
    double cntb=0;
    for (int i = 1; i <= n; ++i)
    {
        cin>>tab[i].fi>>tab[i].se;
        cnta+=tab[i].fi;
        cntb+=tab[i].se;
        a.insert({tab[i].fi,tab[i].se});
        b.insert({tab[i].se,tab[i].fi});
    }
    pair<double,double> cur={0,0};
    double ans=0;
    while(!a.empty()){
        if(cur.fi<cur.se){
            cur.fi--;
            cur.se--;
            cur.fi+=a.rbegin()->fi;
            cnta-=a.rbegin()->fi;
            cntb-=a.rbegin()->se;
            b.erase(b.find({a.rbegin()->se,a.rbegin()->fi}));
            a.erase(a.find(*a.rbegin()));
        }else if(cur.se<cur.fi){
            cur.fi--;
            cur.se--;
            cur.se+=b.rbegin()->fi;
            cnta-=b.rbegin()->se;
            cntb-=b.rbegin()->fi;
            a.erase(a.find({b.rbegin()->se,b.rbegin()->fi}));
            b.erase(b.find(*b.rbegin()));
        }else if(cnta<cntb){
            cur.fi--;
            cur.se--;
            cur.fi+=a.rbegin()->fi;
            cnta-=a.rbegin()->fi;
            cntb-=a.rbegin()->se;
            b.erase(b.find({a.rbegin()->se,a.rbegin()->fi}));
            a.erase(a.find(*a.rbegin()));
        }else{
            cur.fi--;
            cur.se--;
            cur.se+=b.rbegin()->fi;
            cnta-=b.rbegin()->se;
            cntb-=b.rbegin()->fi;
            a.erase(a.find({b.rbegin()->se,b.rbegin()->fi}));
            b.erase(b.find(*b.rbegin()));
        } 
        ans=max(ans,min(cur.fi,cur.se));
    }
    cout <<fixed<<setprecision(4)<< ans<<endl;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 40