c++++++++++++++++++++++++++++++++++++++++++++++++

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

#include <iostream>
using namespace std;
int main() {
    long long n,q;
    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=b-a-1;
            long long m2=(a==1) ? n-b:(b==n) ? a-1:a-1+n-b;
            cout<<m1*m2<<'\n';
        }
    }
    return 0;
}