#include using namespace std; unsigned long long xor64() { static unsigned long long x = (unsigned long long)(chrono::duration_cast( chrono::high_resolution_clock::now().time_since_epoch()).count()) * 10150724397891781847ULL; x ^= x << 17; return x ^= x >> 19; } struct dsu { public: int csz; dsu() : _n(0) {} dsu(int n) : _n(n), csz(n), parent_or_size(n, -1) {} int merge(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); int x = leader(a), y = leader(b); if (x == y) return x; if (-parent_or_size[x] < -parent_or_size[y]) std::swap(x, y); csz--; parent_or_size[x] += parent_or_size[y]; parent_or_size[y] = x; return x; } bool same(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); return leader(a) == leader(b); } int leader(int a) { assert(0 <= a && a < _n); if (parent_or_size[a] < 0) return a; return parent_or_size[a] = leader(parent_or_size[a]); } int size(int a) { assert(0 <= a && a < _n); return -parent_or_size[leader(a)]; } std::vector> groups() { std::vector leader_buf(_n), group_size(_n); for (int i = 0; i < _n; i++) { leader_buf[i] = leader(i); group_size[leader_buf[i]]++; } std::vector> result(_n); for (int i = 0; i < _n; i++) { result[i].reserve(group_size[i]); } for (int i = 0; i < _n; i++) { result[leader_buf[i]].push_back(i); } result.erase( std::remove_if(result.begin(), result.end(), [&](const std::vector& v) { return v.empty(); }), result.end()); return result; } private: int _n; // root node: -1 * component size // otherwise: parent std::vector parent_or_size; }; int main(){ int N, Q; cin >> N >> Q; dsu uf(N); vector candidate; while(Q--){ int type, u = 0, v; cin >> type >> v; if(type == 1){ cin >> u; uf.merge(--u, --v); continue; } if(uf.size(0) == N){ cout << -1 << '\n'; continue; } v--; for(auto &&v2 : candidate){ if(!uf.same(v2, v)){ u = v2; break; } } while(uf.same(u, v)) u = xor64() % N; cout << u + 1 << '\n'; candidate.push_back(u); } }