Patrick and Shopping codeforces in c++

#include <iostream>
#include <algorithm>
using namespace std;

int main() {
    int d1, d2, d3;
    cin >> d1 >> d2 >> d3;

    int ans = min({d1+d2+d3, d1+d1+d2+d2, d1+d3+d3+d1, d2+d3+d3+d2});
    cout << ans << endl;

    return 0;
}

Explanation:

• The first two lines include the necessary header files for input/output and algorithm functions in C++.
• The using namespace std; statement allows us to use the standard library functions without explicitly specifying the std:: prefix.
• The main() function is the entry point of the program.
• Three integer variables d1, d2, and d3 are declared to store the input values.
• The cin statement is used to read three integers from the user and store them in the variables d1, d2, and d3.
• The min() function is used to find the minimum value among a list of four expressions.
• The first expression d1+d2+d3 calculates the sum of all three distances.
• The second expression d1+d1+d2+d2 calculates the sum of the first distance twice and the second distance twice.
• The third expression d1+d3+d3+d1 calculates the sum of the first distance twice and the third distance twice.
• The fourth expression d2+d3+d3+d2 calculates the sum of the second distance twice and the third distance twice.
• The result of the min() function is stored in the variable ans.
• The cout statement is used to output the value of ans to the console.
• The endl manipulator is used to insert a newline character after the output.
• Finally, the return 0; statement indicates that the program has finished execution and returns a value of 0 to the operating system.