// #define DEBUGGING #include using namespace std; #define endl '\n' #define ALL(V) (V).begin(), (V).end() #define ALLR(V) (V).rbegin(), (V).rend() template using V = vector; template using VV = V>; using ll = int64_t; using ull = uint64_t; using PLL = pair; template const T& var_min(const T &t) { return t; } template const T& var_max(const T &t) { return t; } template const T& var_min(const T &t, const Tail&... tail) { return min(t, var_min(tail...)); } template const T& var_max(const T &t, const Tail&... tail) { return max(t, var_max(tail...)); } template void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); } template void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); } template const T& clamp(const T &t, const T &low, const T &high) { return max(low, min(high, t)); } template void chclamp(T &t, const T &low, const T &high) { t = clamp(t, low, high); } namespace init__ { struct InitIO { InitIO() { cin.tie(nullptr); ios_base::sync_with_stdio(false); cout << fixed << setprecision(30); } } init_io; } #ifdef DEBUGGING // #include "../debug/debug.cpp" #include "../../debug/debug.cpp" #else #define DEBUG(...) 0 #define DEBUG_SEPARATOR_LINE 0 #endif template T make_v(T init) { return init; } template auto make_v(T init, size_t s, Tail... tail) { #define rec make_v(init, tail...) return V(s, rec); #undef rec } const size_t buf_size = 1ll << 10; ll buf[buf_size]; int main() { ll N; cin >> N; V A(N); for(auto &&ele : A) cin >> ele; VV plis(N); for(ll i = 0; i < N; i++) { ll e = A[i]; for(ll j = 2; j * j <= A[i]; j++) { ll cnt = 0; while(e % j == 0) { e /= j; cnt++; } if(cnt) plis[i].push_back(j); } if(1 < e) plis[i].push_back(e); } DEBUG(plis); ll ans = 0; for(ll i = 0; i < N; i++) { V dp(1ll << plis[i].size()); dp.back() = 1; for(ll j = i + 1; j < N; j++) { for(ll i = 0; i < dp.size(); i++) buf[i] = dp[i]; ll mask = dp.size() - 1; for(ll k = 0; k < plis[i].size(); k++) if(A[j] % plis[i][k]) mask ^= (1ll << k); for(ll i = 0; i < dp.size(); i++) dp[i & mask] += dp[i]; } ans += dp[0]; } cout << ans << endl; return 0; }