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41 lines
1002 B
C++
41 lines
1002 B
C++
#define _CRT_SECURE_NO_WARNINGS
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#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
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#include <bits/stdc++.h>
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using namespace std;
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#define CRP(t, x) const t &x
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#define OPL(t, x) bool operator<(CRP(t, x)) const
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#define FIL(x, v) memset(x, v, sizeof(x))
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#define CLR(x) FIL(x, 0)
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#define NE1(x) FIL(x, -1)
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#define INF(x) FIL(x, 0x3f)
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#ifndef _DEBUG
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#define _DEBUG 0
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#endif // !_DEBUG
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#define IFD if (_DEBUG)
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typedef int64_t ll, i64;
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typedef uint64_t ull, u64;
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const int N = 1005 * 1005;
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const double eps = 1e-8;
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int a[1605], x[45];
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int main()
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{
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int T, n;
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double p;
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scanf("%d", &T);
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while (T--)
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{
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scanf("%d%lf", &n, &p);
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for (int i = 1; i <= n; i++)
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cin >> x[i];
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a[0] = 0;
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int co = 1;
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for (int i = 0; i <= n; i++)
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for (int j = i + 1; j <= n; j++)
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a[co++] = x[i] + x[j];
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sort(a, a + co);
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n = (1.0 - p < eps) ? n : (int)(p * pow(2, n));
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cout << a[n - 1] << endl;
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}
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return 0;
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}
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