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24 lines
620 B
C++
24 lines
620 B
C++
#include <cstdio>
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#include <cmath>
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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) continue;
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else 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) { m = l; break; }
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else if (fl*fm < 0) r = m;
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else 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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} |