کلید چراغ

Main.c

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#include <iostream>

using namespace std;

int main()
{
    int n;
    
    cin >> n;
    
    int arr[n];
    
    for (int i = 0; i < n; i++) {
        cin >> arr[i];
    }
    
    int count = 0;
    
    for (int i = 1; i < n; i++) {
        if (arr[i] != arr[i - 1]){count++;}
    }
    
    cout << count;

    return 0;
}

به زبان پایتون

n=int(input())
arr=[]

for i in range(n):
arr.append(input())

count=0

i=1
while i<n:
if arr[i] != arr[i-1]:
count+=1

i+=1

print(count)