func_code_string: #include <bits/stdc++.h>   using namespace std;   int aray[100002];   int main() {     int i, j, k, a, b, x, n, y, p, q, len, mx = 0, s = 1;     scanf( %d , &n);     for (i = 0; i < n; i++) {       scanf( %d , &aray[i]);     }     p = 0;     q = 0;     s = 0;     for (i = 1; i < n; i++) {       a = aray[i] - aray[i - 1];       if (a) {         if (p == a) {           s = q;         }         q = i;         p = a;       }       len = i - s + 1;       if (len > mx) mx = len;     }     cout << mx;     return 0;   }   