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mystery1

Language/Type: C++ arrays

What are the values of the elements in array a1 after the following code executes? 

void mystery1(int a1[], int length1, int a2[], int length2) {
    for (int i = 0; i < length1; i++) {
        a1[i] += a2[length2 - i - 1];
    }
}

int a1[] = {1, 3, 5, 7, 9};
int a2[] = {1, 4, 9, 16, 25};
mystery1(a1, 5, a2, 5);
a1[0]
a1[1]
a1[2]
a1[3]
a1[4]

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