#include<iostream> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <cmath> using namespace std; #pragma warning(disable:4996) int main() { int a, b, c; double p,s; while (scanf("%d %d %d",&a,&b,&c)) { p = (a + b + c) / 2; s = sqrt(p*(p - a)*(p - b)*(p - c)); printf("%.2lf\n", s); } return 0; } |
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