Submission #468686

#	Time	Username	Problem	Language	Result	Execution time	Memory
468686		wdjpng	Sure Bet (CEOI17_sure)	C++17	20 / 100	1 ms	204 KiB

sure

#include <bits/stdc++.h>
//#define double double
#define rep(i,n) for(int i = 0; i < n; i++)
#define all(a) a.begin(), a.end()

using namespace std;

signed main()
{
    int n;
    cin>>n;

    vector<double>a(n),b(n);
    rep(i,n) cin>>a[i]>>b[i];

    sort(all(a));
    sort(all(b));
    reverse(all(a));
    reverse(all(b));

    double maxx = 0;
    int off = 2;
    vector<double>sum(2);
    vector<int>point(2,1);

    sum[0] = a[0];
    sum[1] = b[0];

    while(min(point[0], point[1])<n)
    {
        maxx=max(maxx, min(sum[0], sum[1])-off);
        if(point[0]==n||sum[0]>sum[1]) {
            sum[1]+=b[point[1]]; 
            point[1]++;
        }
        else {
            sum[0]+=a[point[0]]; 
            point[0]++;
        }
        off++;
    }
    maxx=max(maxx, min(sum[0], sum[1])-off);
    //cout<<(int)maxx<<".";
    //maxx-=(int)maxx;
    //rep(i,3) 
    //{
    //    maxx*=10;
    //    cout<<(int)maxx;
    //    maxx-=(int)maxx;
    //}
    //maxx*=10;
    //int o = (int)maxx;
    //if(1000*o+499<1000*maxx) o++;
    //cout<<o;
    printf("%.4lf",(double)maxx);
    //cout<<"\n";
}

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