Solution: International Shipping Calculator

// Calculating shipping costs with nested logic
#include <iostream>
int main() {
    int regionCode;
    double weight;
    std::cin >> regionCode >> weight;
    // Outer check: Destination
    if (regionCode == 1) 
    {
        // Inner check: Domestic Weight Rules
        if (weight <= 10.0) 
        {
            std::cout << "Shipping Cost: $15.00" << std::endl;
        } else {
            std::cout << "Shipping Cost: $25.00" << std::endl;
        }
    } 
    
    else if (regionCode == 2)
    {
        // Inner check: International Weight Rules
        if (weight <= 5.0) 
        {
            std::cout << "Shipping Cost: $50.00" << std::endl;
        } 
        
        else 
        {
            std::cout << "Shipping Cost: $85.00" << std::endl;
        }
    } 
    
    else 
    {
        // Handle invalid region codes
        std::cout << "Error: Invalid Region" << std::endl;
    }
    return 0;
}