球掉

#include<bits/stdc++.h>
using namespace std;
int main() {
    int t, n, a;
    int ans[10010] = {0};
    cin >> t;
    for (int x = 1; x <= t; x++) {
        cin >> n >> a;
        ans[0] = 1;
        for (int i = 1; i <= n; i++) {
            for (int j = 0; j < 2500; j++)
                ans[j] *= i;

            for (int j = 0; j < 2500; j++)
                if (ans[j] > 9) {
                    ans[j + 1] += ans[j] / 10;
                    ans[j] %= 10;
                }
        }
        int cnt = 2500, cnt2 = 0;
        while (ans[cnt] == 0){
            cnt--;
        }

        for (int i = 0; i <= cnt; i++) {
            if (ans[i] == a){
				 cnt2++;
        }
			ans[i] = 0;
        }
        cout << cnt2 <<endl;
    }
    return 0;
}