int max_salary(int **List, int len) {
 int result_1 = 0, result_2 = 0, result = 0;
 if (len <= 0)
  return result;



	 result_1 = max_salary(List, len - 1) + *(*(List + len - 1) + 0);
 result_2 = max_salary(List, len - 2) + 0 + *(*(List + len - 1) + 1);



	 if (result_1 >= result_2) {
  result = result_1;
 }
 else {
  result = result_2;
 }
}



	int main() {
#define MAXNUMLENGTH 5
#define MAXLENGTH 100
 char input_num[5] = { 0 };
 char input[MAXLENGTH] = { 0 };
 int in_count = 0;
 int count = 0;
 int num_len = 0;
 int len = 0;



	 int num_of_days = 0;



	 //输入第一行
 char c = getchar();
 while (c != '\n') {
  input_num[count] = c;
  c = getchar();
  count++;
 }
 num_len = count;
 count = 0;



	 for (int i = num_len - 1; i >= 0; i--) {
  num_of_days += (int)((input_num[i] - '0')*pow(10, in_count));
  in_count++;
 }
 in_count = 0;



	 //输入第二行
 c = getchar();
 while (c != '\n') {
  input[count] = c;
  c = getchar();
  count++;
 }
 len = count;
 count = 0;
 
 //申请内存
 int **salary_list = (int **)(malloc(sizeof(int*) * num_of_days));
 for (int i = 0; i < num_of_days; i++) {
  *(salary_list + i) = (int*)(malloc(sizeof(int) * 2));
  memset(*(salary_list + i), 0, 2);
 }



	 int first_num = 0, second_num = 0;
 for (int i = num_of_days - 1; i >= 0; i--) {
  count += 2;
  second_num = 0;
  while (input[len - count - 1] != ',') {
   second_num += (int)((input[len - count - 1] - '0')*pow(10, in_count));
   in_count++;
   count++;
  }
  in_count = 0;
  count++;



	  *(*(salary_list + i) + 1) = second_num;
  
  first_num = 0;
  while (input[len - count - 1] != '[') {
   first_num += (int)((input[len - count - 1] - '0')*pow(10, in_count));
   in_count++;
   count++;
  }
  in_count = 0;
  count++;



	  *(*(salary_list + i) + 0) = first_num;
 }



	 /*
 for (int i = 0; i < num_of_days; i++) {
  for (int j = 0; j < 2; j++) {
   cout << *(*(salary_list + i) + j) << endl;
  }
 }
 */



	 //int salary_list[4][2] = { {1, 5},{2, 3},{2, 9},{1, 3} };



	 cout << max_salary(salary_list, num_of_days) << endl;



	 //释放内存
 for (int i = 0; i < num_of_days; i++) {
  free(*(salary_list + i));
  *(salary_list + i) = NULL;
 }
 free(salary_list);
 salary_list = NULL;
 
 return 0;
}