\begin{array}{c} \color{#db1616}{\texttt{#Khoadang09}} \end{array}
`@`$\texttt{C++: }$

#include <bits/stdc++.h>
#define buff ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define int long long
using namespace std;
signed main(){
    buff;
    int a, b, c; cin >> a >> b >> c;

    if ((a+b>c)&&(a+c>b)&&(b+c>a)){
        if ((a==b)&&(b==c)) cout << "Tam giac deu";
        
        else if ((a*a == b*b+c*c) || (b*b == a*a+c*c) || (c*c == a*a+b*b))
            cout << "Tam giac vuong";
            
        else cout << "Tam giac thuong";
    }
    else cout << "Khong phai tam giac";
    return 0;
}

Code C++:

$\color{brown}{\text{Chúc bạn học tốt}}$