func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[100005];   map<int, int> s;   int main(void) {     long long ans = 0, z = 0;     int k, b, n;     scanf( %d%d%d , &k, &b, &n);     int zcnt = 0;     s[0]++;     for (int i = 1; i <= n; i++) {       scanf( %d , &a[i]);       zcnt = (a[i] ? 0 : zcnt + 1);       z += zcnt;       a[i] = (a[i] + a[i - 1]) % (k - 1);       int P = (a[i] - b + k - 1) % (k - 1);       ans += s[P];       s[a[i]]++;     }     if (b == 0)       ans = z;     else if (b == k - 1)       ans -= z;     printf( %I64d n , ans);     return 0;   }   