import java.text.NumberFormat; import java.util.Scanner; public class Main { public void sum(int a,int b,int c){ double d=0.5*(a+b+c); double t=Math.sqrt(d*(d-a)*(d-b)*(d-c)); NumberFormat result=NumberFormat.getInstance(); result.setMinimumFractionDigits(2); String e=result.format(t); System.out.println(e); } public static void main(String[] args) { Scanner s=new Scanner(System.in); int a=s.nextInt(); int b=s.nextInt(); int c=s.nextInt(); Main test=new Main(); test.sum(a,b,c); } } |
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