giải c++ giúp em vs ạ

#include <iostream>
#include <math.h>
using namespace std;
int main() {
    freopen("VUONG.INP","r",stdin);
    freopen("VUONG.OUT","w",stdout);
    
    cout.precision(3);
    double a,b;
    cin >> a >> b;
    cout << fixed << sqrt(a*a+b*b);
}

#include<bits/stdc++.h>

using namespcae std;

int main(){

double a,b;

cin>>a>>b;

cout<<fixed<<setprecision(3)<<sprt(a*a+b*b);

return 0;}