// #pragma GCC target("avx") // #pragma GCC optimize("O3") // #pragma GCC optimize("unroll-loops") #include using namespace std; #define rep(i,n) for(int i = 0; i < (int)n; i++) #define FOR(n) for(int i = 0; i < (int)n; i++) #define repi(i,a,b) for(int i = (int)a; i < (int)b; i++) #define all(x) x.begin(),x.end() //#define mp make_pair #define vi vector #define vvi vector #define vvvi vector #define vvvvi vector #define pii pair #define vpii vector> template bool chmax(T &a, const T b) {if(a bool chmin(T &a, const T b) {if(a>b) {a=b; return true;} else {return false;}} using ll = long long; using ld = long double; using ull = unsigned long long; const ll INF = numeric_limits::max() / 2; const ld pi = 3.1415926535897932384626433832795028; const ll mod = 998244353; int dx[] = {1, 0, -1, 0, -1, -1, 1, 1}; int dy[] = {0, 1, 0, -1, -1, 1, -1, 1}; #define int long long template T ceil(T x, U y) { if(x>0 && y>0) return (x+y-1)/y; else if(x>0) return -(x/abs(y)); else if(y>0) return -(abs(x)/y); else return (abs(x)+abs(y)-1)/abs(y); } template T floor(T x, U y) { if(x>0 && y>0) return x/y; else if(x>0) return -((x+abs(y)-1)/abs(y)); else if(y>0) return -((abs(x)+y-1)/y); else return abs(x)/abs(y); } pii merge(pii x, pii y) { return make_pair(max(x.first, y.first), min(x.second, y.second)); } void solve() { int n, l, r; cin >> n >> l >> r; int zero = 0; vi a; FOR(n) { int x; cin >> x; if(x == 0) ++zero; else a.push_back(x); } n = (int)a.size(); vector> dp(2); dp[0][{-INF, INF}] = 0; FOR(n) { int cur = i&1; int nxt = 1^cur; dp[nxt] = dp[cur]; for(auto e : dp[cur]) if(e.first.first <= a[i] && a[i] <= e.first.second) { pii seg1 = e.first; pii seg2; if(a[i]>0) seg2 = {ceil(l, a[i]), floor(r, a[i])}; else seg2 = {ceil(r, a[i]), floor(l, a[i])}; pii seg = merge(seg1, seg2); if(seg.first > seg.second) continue; dp[nxt][seg] = max(dp[nxt][seg], e.second+1); } } // 0を使えるかどうか int ans = 0; for(auto e : dp[n&1]) chmax(ans, e.second); if(l <= 0 && 0 <= r) ans += zero; cout << ans << endl; // for(auto e : dp[n&1]) { // cout << e.first.first << " " << e.first.second << " -> " << e.second << endl; // } } signed main() { cin.tie(nullptr); ios::sync_with_stdio(false); solve(); return 0; }