import java.util.Scanner;

public class Wateroverflow {
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);

        int liters=255;
        int n=Integer.parseInt(sc.nextLine());
        int sumL=0;

        for(int i=1;i<n;i++){
            int inputL=Integer.parseInt(sc.nextLine());
            sumL+=inputL;
            if(sumL>liters){
                System.out.print("Insufficient capacity!");
                sumL-=inputL;
            }else{
                sumL+=inputL;
            }
        }
        System.out.printf("%n%d",sumL);
    }
}