Submission #1823912

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Source Code Expand

#include <iomanip>
#include <random>
#include <time.h>
#include <vector>
#include <math.h>
#include <algorithm>
#include <string>
#include <queue>
#include <functional>
#include <iostream>
#include <map>
using namespace std;
int main() {
	long long int n, k, a[100010], ans = 0, yan = 1;
	cin >> n >> k;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	sort(a, a + n);
	for (int i = 0; i < k; i++) {
		ans += a[i];
		yan *= k - i;
	}
	ans += yan;
	cout << ans << endl;
	return 0;
}

Submission Info

Judge Result