Einstein's Physics, C++ (gcc)

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

const double me = 9.10938356e-31;
const double mp = 1.6726219e-27;
const double e = 1.6e-19;
const double h = 6.626e-34;
const double c = 299792458;
const double M = 1e6;
const double MS = 1.989e30;
const double ME = 5.972e24;
const double Me = M * e;
const double PI = 2 * acos(0);

double beta(double g) {return sqrt(1 - 1 / (g * g));}
double gamma(double v) {return 1 / sqrt(1 - v * v);}
double rel(double u, double v) {return (u - v) / (1 - u * v);}
double getLembda(double dL, double dE) {return (-dL + sqrt(dL*dL + 4 * dL * h * c / dE)) / 2;}
double getEnergy(double L) {return h * c / L;}
double getEnergyF(double f) {return h * f;}
double L(double E) {return h * c / E;}
double eV(double E) {return E / e;}
double J(double ev) {return ev * e;}
double Lc(double m) {return h / (m * c);}
double shift(double Lc, double phi) {return Lc * (1 - cos(phi * PI / 180));}

void solve() {
    // Q3 cout << getLembda(2 * Lc(me), J(44*1e3));
    // Q4 double l1 = 0.1e-9; cout << shift(Lc(mp), 180) / l1;
    // Q5 cout << acos((1 - L(2 * me * c * c) / Lc(me))) * 180 / PI;
    // Q6 double phi = 45; cout << (h * c) / ((1 - cos(phi * PI/180)) * Lc(me)) / (e*1e6);
    // Q7 double l1 = 0.1867e-9; cout << l1 - shift(Lc(me), 163) << " " << getEnergy(l1 - shift(Lc(me), 163))/e;    
    // Q8 double phi = acos(1 - 0.5e-12/Lc(me)); double p = sqrt(getEnergy(10.0e-12) * getEnergy(10.0e-12) + getEnergy(10.5e-12) * getEnergy(10.5e-12) - 2 * getEnergy(10.0e-12) * getEnergy(10.5e-12) * cos(phi)) / c; cout << p << "\n"; double theta = asin(getEnergy(10.5e-12)*sin(phi)/(c*p)) * 180/PI; cout << theta;
    // Q9 cout << getEnergy(getLembda(shift(Lc(me), 180), 50.0e3 * e)) / e;
    // Q10 double E1 = 100.0e3 * e; double E2 = 90.0e3 * e; cout << acos(1 - ((h*c) / Lc(me)) * ((E1 - E2) /(E1 * E2))) * 180 / PI;
    // Q11
    
}

signed main() {
    solve();
    return 0;
}

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Compilation time: 1.42 sec, absolute running time: 0.16 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 1,64 sec