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#include <iostream>
#include <algorithm> // For std::min and std::max

void kernel(double* vsp, double* vstp, double* vxne, double* ve3, double* vlr, double* vlin, double* vxnd, int loop, int n) {
    double scale = 5.0 / 3.0;
    double xnm, e6;

    for (int l = 1; l <= loop; ++l) {
        int i = n - 1;
        int ink = -1;
        xnm = 1.0 / 3.0;
        e6 = 1.03 / 3.07;

        while (true) {
            double e3 = xnm * vlr[i] + vlin[i];
            double xnei = vxne[i];
            vxnd[i] = e6;
            double xnc = scale * e3;

            if (xnm > xnc || xnei > xnc) {
                e6 = xnm * vsp[i] + vstp[i];
                vxne[i] = e6;
                xnm = e6;
                ve3[i] = e6;
                i += ink;
                if (i == 0) break;
            } else {
                ve3[i] = e3;
                e6 = e3 + e3 - xnm;
                vxne[i] = e3 + e3 - xnei;
                xnm = e6;
                i += ink;
                if (i == 0) break;
            }
        }
    }
}

int main() {
    const int loop = 1000; // Number of iterations
    const int n = 50; // Size of arrays
    double vsp[n], vstp[n], vxne[n], ve3[n], vlr[n], vlin[n], vxnd[n];

    // Initialize arrays with some example values
    for (int i = 0; i < n; ++i) {
        vsp[i] = vstp[i] = vxne[i] = ve3[i] = vlr[i] = vlin[i] = vxnd[i] = 1.0; // Example initialization
    }

    // Call the kernel function
    kernel(vsp, vstp, vxne, ve3, vlr, vlin, vxnd, loop, n);

    // Output the results for verification
    for (int i = 0; i < n; ++i) {
        std::cout << "ve3[" << i << "] = " << ve3[i] << std::endl;
    }

    return 0;
}