/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
{
double x,y,dx=0.001,dy=0.001,s=0.0;
for(x=-1.0;x<=1.0;x+=dx){
for(y=-1.0;y<=1.0;y+=dy){
if(x
*x
+y
*y
<1.0)s
+=Math.
exp(-x
*x
-y
*y
)*dx
*dy
; }
}
}
}
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