Submission #667649

#	Time	Username	Problem	Language	Result	Execution time	Memory
667649		pedroslrey	Table Tennis (info1cup20_tabletennis)	C++14	72 / 100	3103 ms	410396 KiB

tabletennis

#include <bits/stdc++.h>

using namespace std;

map<int, int> vals;

bool test(vector<int> &xs, int n, int k, int x) {
    vector<int> marc(n + k+1);
    vector<int> pairs;
    for (int i = 0; i < n + k; ++i)
        if (!marc[i+1] && vals[x - xs[i]] != 0 && vals[x - xs[i]] != i + 1) {
            pairs.push_back(xs[i]);
            pairs.push_back(x - xs[i]);
            marc[vals[x - xs[i]]] = true;
        }

    sort(pairs.begin(), pairs.end());

    if (pairs.size() >= n) {
        for (int i = 0; i < n; ++i)
            cout << pairs[i] << " ";
        cout << "\n";
        return true;
    }
    return false;
}

int main() {
    int n, k;
    cin >> n >> k;

    vector<int> xs(n+k);
    for (int &x: xs)
        cin >> x;

    for (int i = 0; i < n + k; ++i)
        vals[xs[i]] = i + 1;

    for (int i = 0; i < k+1; ++i)
        for (int j = n-1; j < n + k; ++j)
            if (test(xs, n, k, xs[i] + xs[j])) return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'bool test(std::vector<int>&, int, int, int)':
tabletennis.cpp:19:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   19 |     if (pairs.size() >= n) {
      |         ~~~~~~~~~~~~~^~~~

• 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