#include<stdio.h>#include<math.h>int main(){ float a=0,b=0,c=0,s=0,l=0; scanf("%f,%f,%f",&a,&b,&c); l=(a+b+c)/2; s=sqrt(l*(l-a)*(l-b)*(l-c)); printf("\n s=%6.2f",s); retu
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