func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename T>   inline T read(register T& t) {     register T f = 1;     register char ch = getchar();     t = 0;     while (ch <  0  || ch >  9 ) {       if (ch ==  - ) f = -f;       ch = getchar();     }     while (ch >=  0  && ch <=  9 ) t = t * 10 + ch -  0 , ch = getchar();     t *= f;     return t;   }   template <typename T, typename... Args>   inline void read(T& t, Args&... args) {     read(t);     read(args...);   }   const long long p = 998244353;   inline long long power(register long long x, register long long k = p - 2) {     register long long re = 1;     for (; k; k >>= 1, x = x * x % p)       if (k & 1) re = re * x % p;     return re;   }   long long n, m;   long long a[300005];   long long g[300005], f[300005];   long long ans;   int main() {     read(n);     for (int i = 1; i <= n; i++) read(a[i]), m += a[i];     g[0] = n - 1;     for (int i = 1; i < m; i++)       g[i] =           (m * (n - 1) % p + g[i - 1] * (n - 1) % p * i % p) * power(m - i) % p;     f[m] = 0;     for (int i = m - 1; i >= 0; i--) f[i] = (f[i + 1] + g[i]) % p;     ans = (p - f[0] * (n - 1) % p) % p;     for (int i = 1; i <= n; i++) ans = (ans + f[a[i]]) % p;     printf( %lld n , ans * power(n) % p);     return 0;   }   