Submission #686614

#	Time	Username	Problem	Language	Result	Execution time	Memory
686614		alexdumitru	Table Tennis (info1cup20_tabletennis)	C++14	66 / 100	132 ms	3336 KiB

tabletennis

#include <iostream>
#include <vector>

using namespace std;

const int NMAX = 150000;

int n, k;
int a[NMAX + 401];

vector<int> v1, v2;

bool works(int sum)
{
    v1.clear(); v2.clear();
    int cnt = 0;
    int i = 1;
    int j = n + k;
    while(i < j && cnt < n / 2 && (j - i + 1) / 2 + cnt >= n / 2)
    {
        if(a[i] + a[j] == sum)
        {
            v1.push_back(a[i]); v2.push_back(a[j]);
            cnt++; i++; j++;
        }
        else if(a[i] + a[j] < sum)
            i++;
        else j--;
    }
    return cnt == n / 2;
}

void solve()
{
    cin >> n >> k;
    for(int i = 1; i <= n + k; i++)
        cin >> a[i];
    bool ok = false;
    for(int i = 1; i <= k + 1 && ok == false; i++)
        for(int j = max(i + 1, n); j <= n + k && ok == false; j++)
            if(works(a[i] + a[j]))
                ok = true;
    for(int i = 0; i < n / 2; i++)
        cout << v1[i] << ' ';
    for(int i = n / 2 - 1; i >= 0; i--)
        cout << v2[i] << ' ';
    cout << '\n';
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    solve();
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 9
• Subtask 3: 0 / 14
• Subtask 4: 15 / 15
• Subtask 5: 9 / 9
• Subtask 6: 14 / 14
• Subtask 7: 15 / 15
• Subtask 8: 13 / 13