description: Petya has got an interesting flower. Petya is a busy person, so he sometimes forgets to water it. You are given n days from Petya's live and you have to determine what happened with his flower in the end.
  
  The flower grows as follows: 
  
    * If the flower isn't watered for two days in a row, it dies. 
    * If the flower is watered in the i-th day, it grows by 1 centimeter. 
    * If the flower is watered in the i-th and in the (i-1)-th day (i > 1), then it grows by 5 centimeters instead of 1. 
    * If the flower is not watered in the i-th day, it does not grow. 
  
  
  
  At the beginning of the 1-st day the flower is 1 centimeter tall. What is its height after n days?
  
  Input
  
  Each test contains multiple test cases. The first line contains the number of test cases t (1 ≤ t ≤ 100). Description of the test cases follows.
  
  The first line of each test case contains the only integer n (1 ≤ n ≤ 100).
  
  The second line of each test case contains n integers a_1, a_2, ..., a_n (a_i = 0 or a_i = 1). If a_i = 1, the flower is watered in the i-th day, otherwise it is not watered.
  
  Output
  
  For each test case print a single integer k — the flower's height after n days, or -1, if the flower dies.
  
  Example
  
  Input
  
  
  4
  3
  1 0 1
  3
  0 1 1
  4
  1 0 0 1
  1
  0
  
  
  Output
  
  
  3
  7
  -1
  1
solution: import java.util.Scanner;
  
  public class Main {
      public static void main(String[] args) {
          Scanner sc = new Scanner(System.in);
          int testcase = sc.nextInt();
          StringBuilder sb = new StringBuilder();
          for(int i = 0 ; i<testcase; i++){
              int day = sc.nextInt();
              int days[] = new int[day];
              int waterCheck = 0, NowaterCheck = 0, flower = 1;
              for(int j = 0; j<day; j++) days[j] = sc.nextInt();
              for(int j = 0; j<day; j++){
                      if (days[j] == 1) {
                          NowaterCheck = 0;
                          waterCheck++;
                          flower++;
                          if (waterCheck >= 2) {
                              flower += 4;
                            
                          }
                      } else {
                          NowaterCheck++;
                          waterCheck = 0;
                          if (NowaterCheck == 2) {
                              flower = -1;
                              break;
                          }
                      }
              }
  
              sb.append(flower).append("\n");
          }
          System.out.println(sb);
      }
  }
  