func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int x, s = 0, t = 0, m, ans = 0, hp = 0;     int a[n];     for (int i = 0; i < n; i++) cin >> a[i];     if (a[0] == 1)       t++;     else       s++;     for (int i = 1; i < n; i++) {       if (a[i] != a[i - 1] && hp == 0) {         hp = 1;       }       if (a[i] != a[i - 1] && hp == 1) {         m = min(s, t);         if (ans < m) ans = m;         if (a[i] == 1)           t = 0;         else           s = 0;       }       if (a[i] == 1) {         t++;       } else if (a[i] == 2) {         s++;       }     }     m = min(s, t);     if (ans < m) ans = m;     cout << ans * 2 << endl;     return 0;   }   