#include <stdio.h>
#include <math.h>
int main() {
int a, b, c;
float circumference, area, p;
scanf("%d %d %d", &a, &b, &c);
circumference = a + b + c;
p = circumference / 2;
area = sqrt(p * (p - a) * (p - b) * (p - c));
printf("circumference=%.2f area=%.2f", circumference, area);
return 0;
}

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