Submission #717893

#	Time	Username	Problem	Language	Result	Execution time	Memory
717893		vjudge1	Table Tennis (info1cup20_tabletennis)	C++17	72 / 100	3061 ms	17416 KiB

tabletennis

#include "bits/stdc++.h"
#define ll long long
using namespace std;
const ll mod = 1000000007;

int b[150001];

signed main () {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    // freopen("cowland.in","r",stdin);
    // freopen("cowland.out","w",stdout);

    int n, k;
    cin >> n >> k;
    vector<int> v;
    for(int i = 0; i < n + k; i++) {
        int x;
        cin >> x;
        v.push_back(x);
    }
    sort(v.begin(), v.end());
    set<int> s;
    for(int i = 0; i <= k; i++) {
        int j = n + k - 1;
        while(i < j && i + ((n + k) - j - 1) <= k)
            s.insert(v[i] + v[j--]);
    }
    for(int x : s) {
        int y = 0;
        for(int i = 0; i < n + k && y < n; i++) {
            int o = lower_bound(v.begin(), v.end(), x - v[i]) - v.begin();
            if(o < i && o < n + k && v[i] + v[o] == x && b[o] == 1) {
                b[i] = b[o] = 2;
                y += 2;
            }
            else
                b[i] = 1;
        }
        if(y >= n) {
            set<int> ans;
            for(int i = 0; i < n + k; i++) {
                if(b[i] == 2)
                    ans.insert(v[i]);
            }
            for(int i : ans)
                cout << i << " ";
            return 0;
        }
        for(int i = 0; i < n + k; i++)
            b[i] = 0;
    }

    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: 0 / 15
• Subtask 8: 0 / 13