Submission #1059615

#	Time	Username	Problem	Language	Result	Execution time	Memory
1059615		Malix	Sure Bet (CEOI17_sure)	C++14	60 / 100	2059 ms	11324 KiB

sure

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> tii;
typedef vector<ll> li;
typedef vector<li> lii;
 
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define MP make_pair
#define LSOne(s) ((s)&(-s))
 
ll INF=1e18+10;
int inf=1e9+10;
ll M=1e9+7;

vector<double> a,b,c,d;

int TS(int x,int l,int r){
    if(l==r)return l;
    int ml=l+(r-l)/3;
    int mr=r-(r-l)/3;
    double p=min(c[x]-ml-1,d[ml]-x-1);
    double q=min(c[x]-mr-1,d[mr]-x-1);
    if(r-l==1){
        if(p>q)return l;
        return r;
    }
    if(r-l==2){
        if(p<q)return TS(x,l+1,r);
        return TS(x,l,r-1);
    }cerr<<p<<" "<<q<<"\n";
    if(p<q)return TS(x,ml,r);
    else return TS(x,l,mr);
}

int main() {   
    int n;cin>>n;
    a.resize(n);b.resize(n);c.resize(n);d.resize(n);
    REP(i,0,n)cin>>a[i]>>b[i];
    sort(a.begin(),a.end());
    sort(b.begin(),b.end());
    reverse(a.begin(),a.end());
    reverse(b.begin(),b.end());
    double ans=0;
    c[0]=a[0]-1;
    REP(i,1,n)c[i]=a[i]+c[i-1]-1;
    d[0]=b[0]-1;
    REP(i,1,n)d[i]=b[i]+d[i-1]-1;
    REP(i,0,n){
        int k=TS(i,0,n-1);
        ans=max(ans,min(c[i]-k-1,d[k]-i-1));
    }
    cout<<fixed<<setprecision(4)<<ans;
}

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