func_code_string: #include <bits/stdc++.h>   using namespace std;   long long a[(20ll + (long long)2e5)], b[(20ll + (long long)2e5)],       c[(20ll + (long long)2e5)], *d[(20ll + (long long)2e5)],       e[(20ll + (long long)2e5)];   int main() {     long long n;     scanf( %lld , &n);     for (long long i = 1; i <= n; i++) {       scanf( %lld , &a[i]);       a[i] *= i * (n - i + 1);       b[i] = a[i];     }     for (long long i = 1; i <= n; i++) {       scanf( %lld , &c[i]);       d[i] = &b[i];     }     sort(d + 1, d + n + 1, [](long long* l, long long* r) { return *l < *r; });     sort(c + 1, c + 1 + n, greater<long long>());     for (long long i = 1; i <= n; i++) {       *d[i] = c[i];     }     long long s = 0, mod = 998244353ll;     for (long long i = 1; i <= n; i++)       s = (s + (a[i] % mod * (b[i] % mod)) % mod) % mod;     printf(          %lld            n ,         s);     ;     return 0;   }   