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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. int main(void) {
  5. // your code goes here
  6. int a,b,c;
  7. scanf ("%d%d%d",&a,&b,&c);
  8. double s;
  9. s=0.5*(a+b+c);
  10. double area;
  11. area=sqrt (s*(s-a)*(s-b)*(s-c));
  12. printf ("%f",area);
  13.  
  14.  
  15. return 0;
  16. }
  17.  
Success #stdin #stdout 0s 5332KB
stdin
3 4 5
stdout
6.000000