这个代码em......有问题吗？（求大佬）

AC必关

#include<bits/stdc++.h>
using namespace std;

int no(){
    cout<<"No solution.";
    return 0;
}

int main(){
    int a, b, c;
    cin >> a >> b >> c;
    if(a + b <= c || a + c <= b || b + c <= a)
        return no();
    double p = (a + b + c) / 2.0;
    double area = sqrt(p * (p - a) * (p - b) * (p - c));
    printf("%.2f", area);
    return 0;
}

希望能看懂QAQ

AC必关