Question

Информатика задание из ЕГЭ! Помогите!! В программе используется одномерный целочисленный массив A с индексами от 0 до 9 значения элементов равны 4,1,3,7,5,8,1,2,9,6 со­от­вет­ствен­но, т.е. A[0]=4, A[1] =1 и тд. Определите значение переменной s после выполнения следующего фрагмента этой программы: s:=0 for i:=2 to 9 do s:=s+A[i]-A[i-2]

Answer 1

4,1,3,7,5,8,1,2,9,6
i = 2; s = 0+3-4 = -1
i = 3; s = -1+7-1 = 5
i = 4; s = 5+5-3 = 7
i = 5; s = 7+8-7 = 8
i = 6; s = 8+1-5 = 4
i = 7; s = 4+2-8 = -2
i = 8; s = -2+9-1 = 6
i = 9; s = 6+6-2 = 10
Или так: s = A[8]+A[9]-A[0]-A[1] = 9+6-4-1 = 10
Ответ: 10

Answer 2

Task Analysis

The task involves determining the value of the variable s after executing a specific fragment of a program that uses a one-dimensional integer array A with values assigned to its elements.

Given Information

- Array A with values: 4, 1, 3, 7, 5, 8, 1, 2, 9, 6 - Fragment of the program: s:=0 for i:=2 to 9 do s:=s+A[i]-A[i-2]

Solution

To determine the value of the variable s after executing the given fragment, we need to calculate the sum of the differences between elements of array A according to the given loop.

1. Initialize s to 0. 2. Iterate through the elements of array A from index 2 to 9. 3. For each iteration, add the value of A[i] to s and subtract the value of A[i-2] from s.

Let's calculate the value of s step by step.

Calculating the Value of s

- s is initially 0. - For i = 2: s = 0 + A - A[0] = 0 + 3 - 4 = -1 - For i = 3: s = -1 + A - A = -1 + 7 - 1 = 5 - For i = 4: s = 5 + A - A = 5 + 5 - 3 = 7 - For i = 5: s = 7 + A - A = 7 + 8 - 7 = 8 - For i = 6: s = 8 + A - A = 8 + 1 - 5 = 4 - For i = 7: s = 4 + A - A = 4 + 2 - 8 = -2 - For i = 8: s = -2 + A - A = -2 + 9 - 1 = 6 - For i = 9: s = 6 + A - A = 6 + 6 - 2 = 10

Conclusion

After executing the given fragment of the program, the value of the variable s is 10.