#include <iostream>
#include <vector>
using namespace std;
typedef long long ll;

int main() {
    int a, b, cnt=0;
    cin >> a >> b;
    if(a < 0) {
        a *= -1;
        cnt++;
    }
    if(b < 0) {
        b *= -1;
        cnt++;
    }
    if(b % a == 0) {
        int ans = b/a;
        if(cnt % 2)
            ans *= -1;
        cout << ans << endl;
    } else {
        cout << "NO" << endl;
    }
}