`color(#5C73B9ff)(H)color(#6B68C0ff)(o)color(#795DC6ff)(r)color(#8852CDff)(i)color(#9646D4ff)(z)color(#A53BDAff)(o)color(#B330E1ff)(n)`

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

int main() {
    int n; cin >> n;
    double x; cin >> x;
    vector<double> Vec(n);
    for (auto& i:Vec) cin >> i;
    for (int i = 0; i < n; i++) 
        if (Vec[i] < 0) {
            cout << fixed << setprecision(2) << Vec[i] << " "; 
            break;
        }

    for (int i = n - 1; i >= 0; i--) 
        if (Vec[i] > 0) {
            cout << fixed << setprecision(2) << Vec[i] << " "; 
            break;
        }

    int dau = -1, cuoi = -1;
    for (int i = 0; i < n; i++)
        if (Vec[i] == x) {
            if (dau == -1) dau = i + 1;
            cuoi = i + 1;
        }
    cout << dau << " " << cuoi;
    return 0;
}

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

double ma[101], sa = 0, sd = 0, x = 0; // khởi tạo các biến sa, sd, và x
int n, vta, vtd = 0, vt1, vt2 = 0;

int main() 
{
    cin >> n >> x;
    vta = n-1;
    vt1 = n-1;
    for(int a = 0; a < n; a++)
        cin >> ma[a];
    for(int a = 0; a < n; a++)
    {
        if(ma[a] < 0 && a < vta)
        {
            sa = ma[a];
            vta = a;
        }
        else if(ma[a] > 0 && a > vtd)
        {
            sd = ma[a];
            vtd = a;
        }
        if(ma[a] == x)
        {
            if(a+1 < vt1)
                vt1 = a+1;
            else if(a+1 > vt2)
                vt2 = a+1;
        }
    }
    cout << setprecision(2) << fixed << sa << " " << sd << "\n";
    cout << vt1 << " " << vt2;
    return 0;
}

$#khanhtaon$