Ver2(19行)

```cpp
#include <iostream>
#include <string>
using namespace std;
int main() {
    int n;
    cin >> n;
    string A, B;
    cin >> A >> B;
    int count = 0;
    for (int i = 0; i < n; i++) {
        if (A[i] != B[i]) {
            if (i == 0 || A[i-1] == B[i-1]) {
                count++;
            }
        }
    }
    cout << count << endl;
    return 0;
}
```



```cpp
//Nacznoejo's
#include <iostream>
#include <string>
using namespace std;
int main() {
    int n;
    cin >> n;
    string A, B;
    cin >> A >> B;
    int count = 0;
    bool flip = false;
    for (int i = 0; i < n; ++i) {
        bool isDifferent = (A[i] != B[i]);
        if (isDifferent != flip) {
            count++;
            flip = !flip;
        }
    }
    cout << count/2 << endl;
    return 0;
}
```


IDK WAS IST DAS总之很短的

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