卡了两天ac的原因
超时 没有优化cin cout的时间
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);

当数据范围很大时 一定 long long
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);

#include<iostream>
using namespace std;
using ll = long long;
ll a, b, t, m, h;

ll solve(ll a, ll b)
{
    ll c = 1;
    while (b)
    {
        if (b & 1) c = c * a % m;
        b = b >> 1;
        a = a * a % m;
    }

    return c ;
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> t;
    while (t--)
    {
        ll res = 0;
        cin >> m;
        cin >> h;
        for (int i = 0; i <= h - 1; i++)
        {
            cin >> a >> b;
            res += solve(a, b);
        }
        cout << res % m << endl;
    }

    return 0;
}