func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 200005;   int mod = 998244353;   int T;   int a[N], b[N], p[N];   bool vis[N];   int main() {     scanf( %d , &T);     while (T--) {       int n, k;       scanf( %d%d , &n, &k);       for (int i = 1; i <= n; ++i) {         scanf( %d , &a[i]);         p[a[i]] = i;         vis[i] = 0;       }       for (int i = 1; i <= k; ++i) {         scanf( %d , &b[i]);       }       int ans = 1;       for (int i = k; i >= 1; --i) {         int t = p[b[i]];         int kk = 0;         if (t > 1 && !vis[t - 1]) kk++;         if (t < n && !vis[t + 1]) kk++;         vis[t] = 1;         ans = (ans * kk) % mod;       }       printf( %d n , ans);     }     return 0;   }   