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31 lines
791 B
C++
31 lines
791 B
C++
#include <cmath>
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#include <cstdio>
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#define f(x) (((a * (x) + b) * (x) + c) * (x) + d)
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const double eps = 1e-6;
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double a, b, c, d, l, r, m, fl, fr, fm;
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int main()
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{
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scanf("%lf%lf%lf%lf", &a, &b, &c, &d);
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for (int i = -100; i < 100; i++)
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{
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l = i, r = i + 1 - eps;
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if (f(l) * f(r) > eps)
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continue;
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else
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while (r - l > eps)
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{
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m = (l + r) / 2;
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fl = f(l), fr = f(r), fm = f(m);
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if (abs(fl) < eps) {
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m = l;
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break;
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}
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else if (fl * fm < 0)
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r = m;
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else
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l = m;
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}
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printf("%.2f ", m);
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}
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return 0;
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} |