正确题解，AC拿下！

#include <iostream>
using namespace std;
int main() {
    int a, b, c;
    cin >> a >> b >> c;
    if(a + b > c && a + c > b && b + c > a) {
        cout << "能组成三角形\n";
        if (a * a + b * b == c * c) cout << "是直角三角形\n";
        else if (a == b || b == c || a == c) cout << "是等腰三角形\n";
        else cout << "是普通三角形\n";
    }
    else cout << "不能组成三角形\n";
    return 0;
}