AcWing 3664. 数组补全

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#include <iostream>
#include <algorithm>
using namespace std;
int n, k, p, x, y;
int main() {
cin >> n >> k >> p >> x >> y;
int sum = 0;
vector<int> a(k);
for (int i = 0; i < k; ++i) {
cin >> a[i];
sum += a[i];
}
x -= sum;
if (x < n - k) cout << -1;
else {
sort(a.begin(), a.end());
int mid = lower_bound(a.begin(), a.end(), y) - a.begin();
int s1 = min(n / 2 - mid, n - k);
int s2 = n - s1 - k;
if (s1 + s2 * y > x || (s2 && y > p)) {
cout << -1;
} else {
for (int i = 0; i < s1; ++i) {
cout << 1 << " ";
}
for (int i = 0; i < s2; ++i) {
cout << y << " ";
}
}
}
cout << endl;
return 0;
}