func_code_string: #include <bits/stdc++.h>   int n, m;   int a[200010], b[200010], fail[200010];   int main() {     scanf( %d %d , &m, &n);     --n;     --m;     int x, y;     scanf( %d , &x);     for (int i = 0; i < m; ++i) {       scanf( %d , &y);       b[i] = y - x;       x = y;     }     scanf( %d , &x);     for (int i = 0; i < n; ++i) {       scanf( %d , &y);       a[i] = y - x;       x = y;     }     if (!n) return 0 * printf( %d n , m + 1);     if (!m) return 0 * printf( 0 n );     fail[0] = 0;     for (int i = 1; i < n; ++i) {       for (x = fail[i]; x && a[x] != a[i]; x = fail[x])         ;       fail[i + 1] = (a[x] == a[i]) ? x + 1 : 0;     }     x = y = 0;     for (int i = 0; i < m; ++i) {       for (; x && (a[x] != b[i] || x >= n); x = fail[x])         ;       if (a[x] == b[i])         if (++x == n) ++y;     }     printf( %d n , y);     return 0;   }   