#ifndef LOCAL #define FAST_IO #endif // ============ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define OVERRIDE(a, b, c, d, ...) d #define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i) #define REP3(i, m, n) for (i32 i = (i32)(m); i < (i32)(n); ++i) #define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__) #define PER(i, n) for (i32 i = (i32)(n) - 1; i >= 0; --i) #define ALL(x) begin(x), end(x) using namespace std; using u32 = unsigned int; using u64 = unsigned long long; using i32 = signed int; using i64 = signed long long; using f64 = double; using f80 = long double; template using Vec = vector; template bool chmin(T &x, const T &y) { if (x > y) { x = y; return true; } return false; } template bool chmax(T &x, const T &y) { if (x < y) { x = y; return true; } return false; } template Vec> runlength(const Vec &a) { if (a.empty()) { return Vec>(); } Vec> ret; i32 prv = 0; REP(i, 1, a.size()) { if (a[i - 1] != a[i]) { ret.emplace_back(prv, i, a[i - 1]); prv = i; } } ret.emplace_back(prv, (i32)a.size(), a.back()); return ret; } #ifdef INT128 using u128 = __uint128_t; using i128 = __int128_t; istream &operator>>(istream &is, i128 &x) { i64 v; is >> v; x = v; return is; } ostream &operator<<(ostream &os, i128 x) { os << (i64)x; return os; } istream &operator>>(istream &is, u128 &x) { u64 v; is >> v; x = v; return is; } ostream &operator<<(ostream &os, u128 x) { os << (u64)x; return os; } #endif [[maybe_unused]] constexpr i32 INF = 1000000100; [[maybe_unused]] constexpr i64 INF64 = 3000000000000000100; struct SetUpIO { SetUpIO() { #ifdef FAST_IO ios::sync_with_stdio(false); cin.tie(nullptr); #endif cout << fixed << setprecision(15); } } set_up_io; // ============ #ifdef DEBUGF #else #define DBG(x) (void)0 #endif int main() { i32 n, m; cin >> n >> m; Vec p(n); REP(i, n) { cin >> p[i]; --p[i]; } Vec> g(n); REP(i, m) { i32 a, b; cin >> a >> b; --a; --b; if (a != b) { g[a].push_back(b); g[b].push_back(a); } } i32 thre = round(sqrt(m)); Vec> lala(n); REP(i, n) { if ((i32)g[i].size() >= thre) { for (i32 j : g[i]) { lala[j].push_back(i); } } } Vec> ngs(n); REP(i, n) { if ((i32)g[i].size() < thre) { for (i32 j : g[i]) { ngs[j].insert(p[i]); } } } i32 q; cin >> q; while (q--) { i32 x, y; cin >> x >> y; --x; --y; if (p[x] == p[y]) { cout << "No\n"; continue; } bool ok = ngs[x].count(p[y]); for (i32 v : lala[x]) { if (p[v] == p[y]) { ok = true; } } if (!ok) { cout << "No\n"; continue; } cout << "Yes\n"; if ((i32)g[x].size() < thre) { for (i32 v : g[x]) { ngs[v].erase(ngs[v].find(p[x])); } } p[x] = p[y]; if ((i32)g[x].size() < thre) { for (i32 v : g[x]) { ngs[v].insert(p[x]); } } } }