Compile-Time Timer Reload

#include <iostream>
using namespace std;

// Define constexpr computeReload here
#define clockHz 1000000
constexpr int computeReload(int intervalMs){
    return (clockHz * intervalMs + 500) / 1000;
}
// Define constexpr RELOAD_TABLE here
constexpr int RELOAD_TABLE[3] = {
    computeReload(1), computeReload(10), computeReload(100)
};

int main() {
    int idx;
    cin >> idx;
    cout << RELOAD_TABLE[idx];
    // Print RELOAD_TABLE[idx]

    return 0;
}

Solving Approach