#include <stdio.h> #include <math.h> int main() { int a,b,c;double s,j,m; while(scanf("%d %d %d",&a,&b,&c)!=EOF) {if((a+b>c)&&(a+c>b)&&(b+c>a)) {m=(a+b+c)/2.0; j=m*(m-a)*(m-b)*(m-c); s=sqrt(j); printf("%.2f",s);printf("\n");} }return 0; } |
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