/C04018 - Số cặp bằng nhau trong dãy
<Problem>
https://code.ptit.edu.vn/student/question/C04018#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
#define max(i, j) ((i > j) ? i : j)
#define min(i, j) ((i < j) ? i : j)
int main() {
int t;
scanf("%d", &t);
while (t--) {
int n;
scanf("%d", &n);
int arr[101];
int count = 0;
for (int i = 0; i < n; i++) {
scanf("%d", &arr[i]);
if (i > 0 && arr[i] == arr[i - 1]) count++;
}
printf("%d", count);
printf("\n");
}
return 0;
}