import java.util.Scanner;

public class MoreScanner {
  public static void main(String []args) {
    final int NUM_INTS = 5;
    int sum = 0;
    
    Scanner in = new Scanner(System.in);
    for (int i = 0; i < NUM_INTS; i++) {
      int x = in.nextInt();
      sum += x;
    }

    System.out.println("sum = " + sum);
  }
}