#include <iostream>
using namespace std;
int main() {
int data[10] = {1, 1, 3, 4, 3, 3, 3, 9, 1, 9};
int hasil = 0;
for (int i = 0; i < 9; i++) {
if (data[i] == data[i+1]) {
hasil++;
}
}
cout << hasil << endl;
}
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