Submission #685686

#	Time	Username	Problem	Language	Result	Execution time	Memory
685686		heeheeheehaaw	Table Tennis (info1cup20_tabletennis)	C++17	100 / 100	162 ms	5580 KiB

tabletennis

#include <iostream>
#include <algorithm>
#define int long long

using namespace std;

//ifstream cin("test.in");
//ofstream cout("test.out");

int n, k;
int v[200005];
pair<int, int> rez[200005];

bool possible(int sum)
{
    int st = 0, dr = n + k - 1, cnt = 0;
    while (st < dr && cnt < n / 2 && (dr - st + 1) / 2 + cnt >= n / 2) {
        if (v[st] + v[dr] == sum)
            rez[cnt++] = {st++, dr--};
        else if (v[st] + v[dr] < sum)
            st++;
        else dr--;
    }
    return cnt >= n / 2;
}


void solve()
{
    bool ok = false;
    for(int i = 0; i <= k && !ok; i++)
        for(int j = n - 1; j < n + k && !ok; j++)
            if(i < j && possible(v[i] + v[j]))
                ok = true;
    sort(rez, rez + (n / 2));
    for(int i = 0; i < n / 2; i++)
        cout<<v[rez[i].first]<<" ";
    for(int i = n / 2 - 1; i >= 0; i--)
        cout<<v[rez[i].second]<<" ";
    return;
}

signed main()
{
    cin>>n>>k;
    for(int i = 0; i < n + k; i++)
        cin>>v[i];
    solve();
    return 0;
}

• Subtask 1: 11 / 11
• Subtask 2: 9 / 9
• Subtask 3: 14 / 14
• Subtask 4: 15 / 15
• Subtask 5: 9 / 9
• Subtask 6: 14 / 14
• Subtask 7: 15 / 15
• Subtask 8: 13 / 13