possibily infinite loop :(

[placid terrace]

it works for every other test case except this one.

i don't know what to do

i tried starting from the largest number instead of 0

in the isPrime() for loop

[sacred cedar]

!code cpp

[quasi crypt]

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[placid terrace]

using namespace std;

bool isPrime(int n) {
    if (n == 1 || n == 0 || n <= -1) {
        return false;
    }
    for (int i = n-1; i >= 2; i--) {
        if (n%i == 0) {
            return false;
        }
    }
    return true;
}

bool isTwinPrime(int n) {
    if (isPrime(n) == false) {
        return false;
    }
    if (isPrime(n+2) == true || isPrime(n-2)) {
        return true;
    }
    else {
        return false;
    }
}

int largestTwinPrime(int a, int b) {
    int max = 0;
    for (int i = b; i>=a; i--) {
        if (isTwinPrime(i) == true ){
            if (i > max) {
                max = i;
            }
        }   
    }

    if (max == 0) {
        return -1;
    }
    return max;

return 0;
}

int main () {
    int x, y;

    cout <<"Enter 1 integers: ";
    cin >> x >> y;

    int result = largestTwinPrime(x,y);

    cout << result;
return 0;
} ```