Submission #3224355


Source Code Expand

#include<iostream>
#include<algorithm>
#include<vector>
#include<iomanip>
#include<map>
using namespace std;
typedef long long ll;

ll COM(ll n, ll k) {
	if (k < 0 || n < k) return 0;
	int64_t ret = 1;
	for (int64_t i = 1; i <= k; ++i) {
		ret *= n--;
		ret /= i;
	}
	return ret;
}

int main() {
	ll n, a, b;
	cin >> n >> a >> b;
	ll v[n];
	for (int i = 0; i < n; i++) {
		cin >> v[i];
	}
	sort(v, v + n);
	reverse(v, v + n);
	ll sum = 0;
	for (int i = 0; i < a; i++) {
		sum += v[i];
	}
	map<ll, ll>mp1;
	map<ll, ll>mp2;
	printf("%lf\n", (double)sum / a);
	sum = 0;
	if (v[0] == v[a - 1]) {
		int num = 0;
		for (int i = 0; i < n; i++) {
			if (v[i] == v[0])num++;
		}
		for (int i = a; i <= b; i++) {
			sum += COM(num, i);
		}
		cout << sum << endl;
	}
	else {
		for (int i = 0; i < a; i++) {
			mp1[v[i]]++;
		}
		for (int i = 0; i < n; i++) {
			mp2[v[i]]++;
		}
		cout << COM(mp2[v[a - 1]], mp1[v[a - 1]]) << endl;
	}
}

Submission Info

Submission Time
Task D - Maximum Average Sets
User mine691
Language C++14 (GCC 5.4.1)
Score 400
Code Size 979 Byte
Status AC
Exec Time 3 ms
Memory 384 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 4
AC × 19
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt
All sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt, subtask_1_1.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_2.txt, subtask_1_3.txt, subtask_1_4.txt, subtask_1_5.txt, subtask_1_6.txt, subtask_1_7.txt, subtask_1_8.txt, subtask_1_9.txt
Case Name Status Exec Time Memory
sample_01.txt AC 1 ms 256 KB
sample_02.txt AC 1 ms 256 KB
sample_03.txt AC 1 ms 256 KB
sample_04.txt AC 1 ms 256 KB
subtask_1_1.txt AC 1 ms 256 KB
subtask_1_10.txt AC 1 ms 256 KB
subtask_1_11.txt AC 1 ms 256 KB
subtask_1_12.txt AC 1 ms 256 KB
subtask_1_13.txt AC 1 ms 256 KB
subtask_1_14.txt AC 1 ms 256 KB
subtask_1_15.txt AC 1 ms 256 KB
subtask_1_2.txt AC 1 ms 256 KB
subtask_1_3.txt AC 1 ms 256 KB
subtask_1_4.txt AC 3 ms 384 KB
subtask_1_5.txt AC 1 ms 256 KB
subtask_1_6.txt AC 1 ms 256 KB
subtask_1_7.txt AC 1 ms 256 KB
subtask_1_8.txt AC 1 ms 256 KB
subtask_1_9.txt AC 1 ms 256 KB