33 lines
773 B
C++
33 lines
773 B
C++
#include <tr1/functional>
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#include <iostream>
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typedef std::tr1::function<int()> F;
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static int A(int k, const F &x1, const F &x2, const F &x3, const F &x4, const F &x5);
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struct B_class {
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int &k;
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const F x1, x2, x3, x4;
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B_class(int &_k, const F &_x1, const F &_x2, const F &_x3, const F &_x4) :
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k(_k), x1(_x1), x2(_x2), x3(_x3), x4(_x4) { }
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int operator()() const { return A(--k, *this, x1, x2, x3, x4); }
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};
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static int A(int k, const F &x1, const F &x2, const F &x3, const F &x4, const F &x5)
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{
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F B = B_class(k, x1, x2, x3, x4);
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return k <= 0 ? x4() + x5() : B();
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}
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struct L {
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const int n;
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L(int _n) : n(_n) { }
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int operator()() const { return n; }
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};
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int main()
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{
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std::cout << A(10, L(1), L(-1), L(-1), L(1), L(0)) << std::endl;
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return 0;
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}
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