#include #include #include #include #include #include #include #include #include #include #include #include #include #define repeat(i,n) for (int i = 0; (i) < (n); ++(i)) #define repeat_from(i,m,n) for (int i = (m); (i) < (n); ++(i)) #define repeat_reverse(i,n) for (int i = (n)-1; (i) >= 0; --(i)) #define repeat_from_reverse(i,m,n) for (int i = (n)-1; (i) >= (m); --(i)) #define whole(f,x,...) ([&](decltype((x)) y) { return (f)(begin(y), end(y), ## __VA_ARGS__); })(x) typedef long long ll; using namespace std; template void setmax(T & a, T const & b) { if (a < b) a = b; } template void setmin(T & a, T const & b) { if (b < a) a = b; } template auto vectors(T a, X x) { return vector(x, a); } template auto vectors(T a, X x, Y y, Zs... zs) { auto cont = vectors(a, y, zs...); return vector(x, cont); } template struct segment_tree { // on monoid int n; vector a; function append; // associative T unit; template segment_tree(int a_n, T a_unit, F a_append) { n = pow(2,ceil(log2(a_n))); a.resize(2*n-1, a_unit); unit = a_unit; append = a_append; } void point_update(int i, T z) { a[i+n-1] = z; for (i = (i+n)/2; i > 0; i /= 2) { a[i-1] = append(a[2*i-1], a[2*i]); } } T range_concat(int l, int r) { return range_concat(0, 0, n, l, r); } T range_concat(int i, int il, int ir, int l, int r) { if (l <= il and ir <= r) { return a[i]; } else if (ir <= l or r <= il) { return unit; } else { return append( range_concat(2*i+1, il, (il+ir)/2, l, r), range_concat(2*i+2, (il+ir)/2, ir, l, r)); } } }; map count_kadomatsu(vector const & a, int first, int last) { int n = a.size(); int direction = first < last ? 1 : -1; map acc; acc[first] = 0; map > que; repeat (i,n) que[direction * a[i]].push_back(i); segment_tree cnt(n, 0, plus()); for (auto it : que) { int ai; vector is; tie(ai, is) = it; ai *= direction; acc[ai] = acc[first]; first = ai; for (int i : is) { fprintf(stderr, "a[i] = %d, i = %d, [0,%d) = %d, (%d,%d) = %d\n", ai, i, i, cnt.range_concat(0, i), i, n, cnt.range_concat(i+1, n)); acc[ai] += cnt.range_concat(0, i) * cnt.range_concat(i+1, n); // acc[ai] += cnt[0,i) * cnt(i,n) } for (int i : is) { cnt.point_update(i, cnt.range_concat(i,i+1) + 1); // cnt[i] += 1 } } acc[last] = acc[first]; return acc; } int main() { // input int n; scanf("%d", &n); vector a(n); repeat (i,n) scanf("%d", &a[i]); // compute int max_a = *whole(max_element, a); map acch = count_kadomatsu(a, -1, max_a+1); // a1 < a2, a2 > a3 map accl = count_kadomatsu(a, max_a+1, -1); // a1 > a2, a2 < a3 for (auto it : acch) { fprintf(stderr, "accr %d %d\n", it.first, it.second); } for (auto it : accl) { fprintf(stderr, "accl %d %d\n", it.first, it.second); } // output int q; scanf("%d", &q); while (q --) { int l, h; scanf("%d%d", &l, &h); fprintf(stderr, "query %d %d\n", l, h); int hr, hl, lr, ll; auto it = acch.upper_bound(h); -- it; // fprintf(stderr, "hri %d\n", it->first); hr = it->second; it = acch.upper_bound(l-1); -- it; // fprintf(stderr, "hli %d\n", it->first); hl = it->second; it = accl.upper_bound(h+1); -- it; fprintf(stderr, "lri %d\n", it->first); lr = it->second; it = accl.upper_bound(l); -- it; fprintf(stderr, "lli %d\n", it->first); ll = it->second; fprintf(stderr, "h %d\n", hr - hl); fprintf(stderr, "l %d\n", ll - lr); printf("%d\n", hr - hl + ll - lr); } return 0; }