delete pics to save space

1.4526.cpp

@@ -0,0 +1,24 @@
+#include<cstdio>
+#include<cmath>
+double a;
+inline double f(double x) { return pow(x,a/x-x); }
+inline double simpson(double a,double b) { return (f(a)+4*f((a+b)/2)+f(b))*(b-a)/6; }
+double asr(double a,double b,double eps,double A)
+{
+	double c=(a+b)/2;
+	double L=simpson(a,c),R=simpson(c,b);
+	if(fabs(L+R-A)<=15*eps) return L+R+(L+R-A)/15;
+	return asr(a,c,eps/2,L)+asr(c,b,eps/2,R);
+}
+double asr(double a,double b,double eps) { return asr(a,b,eps,simpson(a,b)); }
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%lf",&a);
+	const double eps=1e-8;
+	if(a<0) printf("orz\n");
+	else printf("%.5lf\n",asr(eps,20,eps));
+	return 0;
+}