#include using namespace std; template vector compress(vector A){ sort(A.begin(), A.end()); A.erase(unique(A.begin(), A.end()), A.end()); return A; } template struct Segtree { int n, n_org; T e; vector dat; typedef function Func; Func f; Segtree(){} Segtree(int n_input, Func f_input, T e_input){ initialize(n_input, f_input, e_input); } void initialize(int n_input, Func f_input, T e_input){ n_org = n_input; f = f_input; e = e_input; n = 1; while(n < n_input) n <<= 1; dat.resize(2*n-1, e); } void update(int k, T a){ k += n - 1; dat[k] = f(dat[k], a); while(k > 0){ k = (k - 1)/2; dat[k] = f(dat[2*k+1], dat[2*k+2]); } } T get(int k){ return dat[k+n-1]; } T between(int a, int b){ return query(a, b+1, 0, 0, n); } T query(int a, int b, int k, int l, int r){ if(r<=a || b<=l) return e; if(a<=l && r<=b) return dat[k]; T vl = query(a, b, 2*k+1, l, (l+r)/2); T vr = query(a, b, 2*k+2, (l+r)/2, r); return f(vl, vr); } // [S, t] が条件checkを満たす最大のtを求める int bisect(int S, function check){ T val = get(S); int k = S+n-1, l = S, r = S+1; while(true){ while(k%2) k = (k-1)/2, r += r-l; T val2 = f(val, dat[k]); if(check(val2)){ if(r == n) return n_org-1; val = val2; k++; int d = r-l; l += d, r += d; }else{ break; } } while(k> N; vector A(N); for(int i=0; i> A[i]; auto C = compress(A); int sz = C.size(); for(int& a : A) a = lower_bound(C.begin(), C.end(), a) - C.begin(); const int64_t MOD = 1e9+7; typedef pair P; Segtree

st(sz, [](P a, P b){ if(a.first == b.first){ return make_pair(a.first, (a.second + b.second) % MOD); }else{ return max(a, b); } }, {0, 0}); for(int a : A){ st.update(a, {1, 1}); auto res = st.between(0, a-1); if(res.first > 0){ res.first++; st.update(a, res); } } cout << st.between(0, sz-1).second << endl; return 0; }