func_code_string: #include <bits/stdc++.h>   using namespace std;   const int mod = 998244353;   long long power(long long base, long long b) {     long long ret = 1;     while (b) {       if (b & 1) ret = ret * base % mod;       base = base * base % mod;       b >>= 1;     }     return ret;   }   int n, m;   long long ans, cur;   int main() {     scanf( %d%d , &n, &m);     ans = 1LL * (n + m + 1) * power(m + 1, mod - 2) % mod;     for (int i = 1; i <= n; ++i) {       cur = (cur + power(i, mod - 2)) % mod;     }     cur = cur * m % mod + 1;     printf( %lld , ans * cur % mod);     return 0;   }   