func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long N = 5e3 + 5, mod = 1e9 + 7, mod1 = 998244353, mod2 = 1e9 + 9,                   inf = 1e18 + 7;   const long long infll = 1e18 + 7;   long long n, k, X, Y, Z;   long long a[(long long)3e5 + 5];   long long dp[N][N];   signed main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     cin >> n >> k;     Y = n % k;     X = k - Y;     Z = n / k;     for (long long i = 1; i <= n; i++) {       cin >> a[i];     }     sort(a + 1, a + 1 + n);     for (long long i = 0; i <= X; i++) {       for (long long j = 0; j <= Y; j++) {         if (i == 0 && j == 0) {           dp[i][j] = 0;           continue;         }         dp[i][j] = inf;         long long t = i * Z + j * (Z + 1);         if (i) {           dp[i][j] = min(dp[i][j], dp[i - 1][j] + a[t] - a[t - Z + 1]);         }         if (j) {           dp[i][j] = min(dp[i][j], dp[i][j - 1] + a[t] - a[t - Z]);         }       }     }     cout << dp[X][Y];   }   