제출 #492144

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
492144		Biaz	Sure Bet (CEOI17_sure)	C++17	100 / 100	84 ms	3652 KiB

sure

#include <bits/stdc++.h>
#define int long long
//#define double long double
#define Nanase_Kurumi_aka_menhera_chan_is_mine ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define pb push_back
#define pi pair<double,int>
#define ALL(i) i.begin(),i.end()
#define gcd(i,j) __gcd(i,j)
#define fi first
#define se second
#define eps 0.00000001
#define ist insert
#define DNE nullptr
//#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math")
//#pragma GCC optimize("O2")
int max(int x,int y){return x>=y?x:y;}
int min(int x,int y){return x>=y?y:x;}
using namespace std;
typedef int ll;
const int N=1000005;
const int M=1000005;
const int MOD=1000000007;//998244353;
const int INF=1000000000000000000;//2147483647;

double a[N],b[N];
int n;
double ans;
inline void sol(){
    cin >>n;
    for (int i=1;i<=n;i++){
        cin >>a[i]>>b[i];
        //a[i]-=1,b[i]-=1;
    }
    sort(a+1,a+n+1,greater<double>());
    sort(b+1,b+n+1,greater<double>());
    b[n+1]=MOD;
    a[n+1]=MOD;
    //for (int i=1;i<=n;i++)
        //b[i]+=b[i-1];
    double ca=0,cb=0;
    int la=1,lb=1;
    for (int i=1;i<=2*n;i++){
        if (fabs(ca+a[la]-cb)<fabs(cb+b[lb]-ca)){
            ca+=a[la++];
        }
        else{
            cb+=b[lb++];
        }
        ans=max(ans,min(ca,cb)-i);
    }
    cout <<fixed<<setprecision(4)<<ans<<'\n';
}
/*
4
1.4 3.7
1.2 2
1.6 1.4
1.9 1.5
*/
signed main(){
    Nanase_Kurumi_aka_menhera_chan_is_mine
    int _=1;
    //cin >>_;
    while (_--) sol();
    return 0;
}

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