#include <bits/stdc++.h>
using namespace std;
long long n, q;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    cin >> n >> q;
    while (q--)
    {
        long long a, b;
        cin >> a >> b;
        if (a == (b + 1)) cout << "0\n";
        else if (a == 1 and b == n) cout << "0\n";
        else if (a == 1)
        {
            long long mx = b - a - 1;
            long long mn = n - b;
            cout << mx * mn << '\n';
        }
        else if (b == n)
        {
            long long mx = a - 1;
            long long mn = b - a - 1;
            cout << mx * mn << '\n';
        }
        else 
        {
            long long mx = b - a - 1;
            long long mn = a - 1 + n - b;
            cout << mx * mn << '\n';
        }
    }
    return 0;
}

#include <bits/stdc++.h>
using namespace std;
long long n, q;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(nullptr);
cin>>n>>q;
while (q--) {
long long a,b;
cin>>a>>b;
if (a==(b+1) || (a==1 && b==n)) {
cout<<"0\n";
} else {
long long m1=(a==1 || b==n) ? b-a-1:b-a-1;
long long m2=(a==1) ? n-b:(b==n) ? a-1:a-1+n-b;
cout<<m1*m2<<'\n';
}
}
return 0;
}