toph Triangle solution

solve in c++:

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int a,b,c,n;
    double  ar,s;
    cin>>n;
    while(n--)
    {
        cin>>a>>b>>c;
        if(a+b<c || a+c<b || b+c<a)
            cout<<"Oh, No!"<<endl;
            else
        {
            s=double(a+b+c)/2;
            ar=sqrt(s*(s-a)*(s-b)*(s-c));
            printf("%.2lf\n",ar);
            ar=0;
        }

    }
}















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