Submission #1182306

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<cstring>
#include<vector>
#include<queue>
#include<set>
#include<map>
#include<stack>
#include<bitset>
#include<ext/pb_ds/priority_queue.hpp>
using namespace std;

typedef long long LL;
typedef double DB;

int n,A,B,c1,c2;
DB Ans,a[55];
LL C[55][55];

int main()
{
	#ifdef DMC
		freopen("DMC.txt","r",stdin);
	#endif
	
	cin >> n >> A >> B;
	for (int i = 1; i <= n; i++) scanf("%lf",&a[i]);
	C[0][0] = 1;
	for (int i = 1; i <= 50; i++)
	{
		C[i][0] = 1;
		for (int j = 1; j <= 50; j++)
			C[i][j] = C[i - 1][j] + C[i - 1][j - 1];
	}
	sort(a + 1,a + n + 1);
	reverse(a + 1,a + n + 1); bool flag = 1;
	for (int i = 2; i <= A; i++)
		if (fabs(a[i] - a[i - 1]) >= 1E-9) flag = 0;
	if (flag)
	{
		LL tot = 0;
		printf("%.8lf\n",a[1]);
		for (int i = 1; i <= n; i++)
			if (fabs(a[i] - a[1]) <= 1E-9) ++c1;
		for (int i = A; i <= B; i++)
			tot += C[c1][i];
		cout << tot << endl; return 0;
	}
	for (int i = 1; i <= A; i++) Ans += a[i];
	for (int i = 1; i <= n; i++) if (fabs(a[i] - a[A]) <= 1E-9) ++c1;
	for (int i = 1; i <= A; i++) if (fabs(a[i] - a[A]) <= 1E-9) ++c2;
	printf("%.10lf\n",Ans / (DB)(A));
	cout << C[c1][c2] << endl;
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:29:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 1; i <= n; i++) scanf("%lf",&a[i]);
                                                 ^

Judge Result