/* Author: Nguyen Chi Thanh - High School for the Gifted - VNU.HCM (i2528) */ #include <bits/stdc++.h> using namespace std; // #define int long long #define ull unsigned long long #define ld long double #define pii pair<int, int> #define fi first #define se second #define __builtin_popcount __builtin_popcountll #define all(x) (x).begin(), (x).end() #define BIT(x, i) (((x) >> (i)) & 1) #define MASK(x) ((1ll << (x))) #define debug(a, l, r) for (int _i = (l); _i <= (r); ++_i) cout << (a)[_i] << ' '; cout << '\n'; const int MAXN = 1e5 + 5; int n, a[MAXN], k[MAXN]; int mxval; // For subtask3 check void init() { cin >> n; for (int i = 1; i <= n; ++i) cin >> a[i]; for (int i = 1; i <= n; ++i) cin >> k[i]; mxval = *max_element(a + 1, a + n + 1); } namespace subtask12 { bool check() {return n <= 5000;} void solve() { vector<int> dp(n + 5, 0), trace(n + 5, 0); int res = 0, end_pos = 0; for (int i = 1; i <= n; ++i) { dp[i] = 1; for (int j = 1; j < i; ++j) { if (__builtin_popcount(a[j] & a[i]) != k[i]) continue; if (dp[j] + 1 > dp[i]) { dp[i] = dp[j] + 1; trace[i] = j; } } if (dp[i] > res) { res = dp[i]; end_pos = i; } } cout << res << '\n'; vector<int> path; int cur = end_pos; while (cur) { path.push_back(cur); cur = trace[cur]; } reverse(all(path)); for (auto u : path) cout << u << ' '; } } namespace subtask3 { bool check() {return mxval < MASK(8);} void solve() { int M = MASK(8); vector<int> dp_len(M, 0), dp_last(M, 0); vector<int> trace(n + 5, 0); int res = 0, end_pos = 0; for (int i = 1; i <= n; ++i) { int cur = a[i]; int bestlen = 0, bestmask = 0; for (int premask = 0; premask < M; ++premask) { if (__builtin_popcount(premask & cur) != k[i]) continue; if (dp_len[premask] > bestlen) { bestlen = dp_len[premask]; bestmask = premask; } } int newlen = bestlen + 1; trace[i] = dp_last[bestmask]; if (newlen > dp_len[cur]) { dp_len[cur] = newlen; dp_last[cur] = i; } if (newlen > res) { res = newlen; end_pos = i; } } cout << res << '\n'; vector<int> path; for (int cur = end_pos; cur; cur = trace[cur]) path.push_back(cur); reverse(all(path)); for (int u : path) cout << u << ' '; } } signed main() { #ifdef NCTHANH freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); #endif ios_base::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr); init(); if (subtask12::check()) return subtask12::solve(), 0; if (subtask3::check()) return subtask3::solve(), 0; return 0; }