func_code_string: #include <bits/stdc++.h>   using namespace std;   long long l[5001], dp[5001][5001];   void solve() {     int n, k, ans = 0;     cin >> n >> k;     vector<int> v(n, 0);     for (int i = 0; i < (int)(n); ++i) cin >> v[i];     sort(v.begin(), v.end());     for (int i = 0, j = 0; i < n; ++i) {       while (v[i] - v[j] > 5) {         j++;       }       l[i] = j;     }     for (int i = 1; i <= k; i++) {       for (int j = 1; j <= n; j++) {         dp[i][j] = max(dp[i][j - 1], dp[i - 1][l[j - 1]] + j - l[j - 1]);       }     }     cout << dp[k][n] <<   n ;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     ;     long long t = 1;     while (t--) {       solve();     }   }   