func_code_string: #include <bits/stdc++.h>   using std::abs;   using std::bitset;   using std::cerr;   using std::cin;   using std::copy;   using std::cout;   using std::endl;   using std::fill;   using std::fixed;   using std::greater;   using std::lower_bound;   using std::map;   using std::max;   using std::min;   using std::next_permutation;   using std::pair;   using std::priority_queue;   using std::queue;   using std::reverse;   using std::rotate;   using std::set;   using std::sort;   using std::string;   using std::swap;   using std::unique;   using std::unordered_map;   using std::unordered_set;   using std::upper_bound;   using std::vector;   int const INF = (int)1e9;   long long const INFL = (long long)1e18;   long double const PI = 3.1415926535897932384626433832795028;   bool isPrime(int x) {     for (int a = 2; a * a <= x; ++a) {       if (x % a == 0) {         return false;       }     }     return true;   }   int const N = 100100;   int len[N];   int g[N], next[N];   int find(int v) {     if (next[v] != v) {       int root = find(next[v]);       len[v] += len[next[v]];       next[v] = root;     }     return next[v];   }   int v[N], res[N];   bool did[N];   int calc(int a, int b) {     int ret = 0;     find(a);     b -= len[a];     a = next[a];     while (b > 0 && !did[a]) {       ++ret;       did[a] = true;       next[a] = find(g[a]);       len[a] = 1 + len[g[a]];       b -= len[a];       a = find(g[a]);     }     return ret;   }   void solve() {     int n, m;     cin >> n >> m;     for (int i = 0; i < n; ++i) {       next[i] = i;       len[i] = 0;       cin >> g[i];       --g[i];     }     for (int i = 1; i <= m; ++i) {       cin >> v[i];     }     for (int i = 1; i <= m; ++i) {       int b;       cin >> b;       int a = (v[i] + res[i - 1] - 1) % n;       res[i] = calc(a, b);     }     for (int i = 1; i <= m; ++i) {       cout << res[i] <<   n ;     }   }   int main() { solve(); }   