#include using namespace std; using ll = long long int; using P = pair; using P3 = pair; using PP = pair; constexpr int INF = 1<<30; constexpr ll MOD = ll(1e9)+7; constexpr int di[] = {0,1,0,-1}; constexpr int dj[] = {1,0,-1,0}; template struct SegmentTree{ private: using F = function; int N; vector node; F f; Monoid e; // identity element public: SegmentTree(){} SegmentTree(F f, Monoid e):f(f), e(e){} void init(int sz){ N = 1; while(N < sz) N <<= 1; node.assign(2*N-1, e); } void build(vector& v){ int sz = int(v.size()); init(sz); for(int i=0; i=0; i--){ node[i] = f(node[i*2+1], node[i*2+2]); } } void update(int k, Monoid x){ k += N-1; node[k] = x; while(k > 0){ k = (k-1)/2; node[k] = f(node[2*k+1], node[2*k+2]); } } // [a,b) Monoid query(int a, int b){return query(a, b, 0, 0, N);} Monoid query(int a, int b, int k, int l, int r){ if(b <= l || r <= a) return e; if(a <= l && r <= b) return node[k]; Monoid vl, vr; vl = query(a, b, 2*k+1, l, (l+r)/2); vr = query(a, b, 2*k+2, (l+r)/2, r); return f(vl, vr); } }; struct T{ ll maxi=0, cnt=0; T(){} T(ll m, ll c):maxi(m),cnt(c){} }; auto f = [](T a, T b){ if(a.maxi > b.maxi) return a; else if(a.maxi < b.maxi) return b; else return T(a.maxi, (a.cnt+b.cnt)%MOD); }; SegmentTree seg(f, T()); int main(){ int n; cin >> n; vector

a(n); for(int i=0;i> a[i].first; a[i].second = -i; } sort(a.begin(),a.end()); seg.init(n+1); seg.update(0,T(0,1)); for(int i=0;i