求助，0分

#include<bits/stdc++.h>
using namespace std;
//typedef long long ll;
struct Big{
    int len,a[110];
    Big(int x=0){
        memset(a,0,sizeof(a));
        for(len=1;x;len++) a[len]=x%10,x/=10;
        len--;
    }
    int &operator[](int i) {
        return a[i];
    }
    void flatten(int L){
        len=L;
        for(int i=1;i<=len;i++) a[i+1]+=a[i]/10,a[i]%=10;
        while(a[len]==0) len--;
    }
    void print(int xx){
        int nn=0;
        if(1>len) len=1;
        for(int i=len;i>=1;i--){
            if(a[i]==xx) nn++;
        }
        cout<<nn<<endl;
        //for(int i=len;i>=1;i--) cout<<a[i];
        //cout<<endl;
    }
};
Big operator+(Big a,Big b){
    Big c;
    int len=max(a.len,b.len);
    for(int i=1;i<=len;i++) c[i]+=a[i]+b[i];
    c.flatten(len+1);
    return c;
}
Big operator*(Big a,int b){
    Big c;
    int len=a.len;
    for(int i=1;i<=len;i++) c[i]=a[i]*b;
    c.flatten(len+11);
    return c;
}
int main(){
    int n,m,x,f,l,cnt=0;
    cin>>m;
    while(m--){
        cin>>n>>x;
        Big factor(1);
        for(int i=1;i<=n;i++){
            factor=factor*i;
            //ans=ans+factor;   
        }
        factor.print(x);
    }
    return 0;
}