#include <bits/stdc++.h>
using i32 = std::int32_t;
using u32 = std::uint32_t;
using i64 = std::int64_t;
using u64 = std::uint64_t;
using i128 = __int128_t;
using u128 = __uint128_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;
class rep {
struct Iter {
usize itr;
constexpr Iter(const usize pos) noexcept : itr(pos) {}
constexpr void operator++() noexcept { ++itr; }
constexpr bool operator!=(const Iter& other) const noexcept { return itr != other.itr; }
constexpr usize operator*() const noexcept { return itr; }
};
const Iter first, last;
public:
explicit constexpr rep(const usize first, const usize last) noexcept : first(first), last(std::max(first, last)) {}
constexpr Iter begin() const noexcept { return first; }
constexpr Iter end() const noexcept { return last; }
};
class revrep {
struct Iter {
usize itr;
constexpr Iter(const usize pos) noexcept : itr(pos) {}
constexpr void operator++() noexcept { --itr; }
constexpr bool operator!=(const Iter& other) const noexcept { return itr != other.itr; }
constexpr usize operator*() const noexcept { return itr; }
};
const Iter first, last;
public:
explicit constexpr revrep(const usize first, const usize last) noexcept
: first(last - 1), last(std::min(first, last) - 1) {}
constexpr Iter begin() const noexcept { return first; }
constexpr Iter end() const noexcept { return last; }
};
constexpr u64 ceil_log2(const u64 x) {
u64 e = 0;
while (((u64)1 << e) < x) ++e;
return e;
}
constexpr u64 bit_rzeros(const u64 x) { return x == 0 ? 64 : __builtin_ctzll(x); }
template <class Monoid, class Effector> class LazySegmentTree {
using M = Monoid;
using E = Effector;
usize internal_size, logn, seg_size;
std::vector<M> data;
std::vector<E> lazy;
void fetch(const usize k) { data[k] = data[2 * k] + data[2 * k + 1]; }
void apply(const usize k, const E& e) {
data[k] = data[k] * e;
if (k < seg_size) lazy[k] = lazy[k] * e;
}
void flush(const usize k) {
apply(2 * k, lazy[k]);
apply(2 * k + 1, lazy[k]);
lazy[k] = E::one();
}
void push(const usize k) {
for (const usize d : revrep(bit_rzeros(k) + 1, logn + 1)) flush(k >> d);
}
void pull(usize k) {
for (k >>= bit_rzeros(k); k > 1;) fetch(k >>= 1);
}
public:
explicit LazySegmentTree(const usize size = 0, const M& value = M::zero())
: LazySegmentTree(std::vector<M>(size, value)) {}
explicit LazySegmentTree(const std::vector<M>& vec) : internal_size(vec.size()) {
logn = ceil_log2(internal_size);
seg_size = 1 << logn;
data = std::vector<M>(2 * seg_size, M::zero());
lazy = std::vector<E>(seg_size, E::one());
for (const usize i : rep(0, internal_size)) data[seg_size + i] = vec[i];
for (const usize i : revrep(1, seg_size)) fetch(i);
}
usize size() const { return internal_size; }
void assign(usize i, const M& value) {
assert(i < internal_size);
i += seg_size;
for (const usize d : revrep(1, logn + 1)) flush(i >> d);
data[i] = value;
for (const usize d : rep(1, logn + 1)) fetch(i >> d);
}
void operate(usize l, usize r, const E& e) {
assert(l <= r and r <= internal_size);
l += seg_size;
r += seg_size;
push(l);
push(r);
for (usize l0 = l, r0 = r; l0 < r0; l0 >>= 1, r0 >>= 1) {
if (l0 & 1) apply(l0++, e);
if (r0 & 1) apply(--r0, e);
}
pull(l);
pull(r);
}
M fold() const { return data[1]; }
M fold(usize l, usize r) {
assert(l <= r and r <= internal_size);
l += seg_size;
r += seg_size;
push(l);
push(r);
M ret_l = M::zero(), ret_r = M::zero();
while (l < r) {
if (l & 1) ret_l = ret_l + data[l++];
if (r & 1) ret_r = data[--r] + ret_r;
l >>= 1;
r >>= 1;
}
return ret_l + ret_r;
}
template <class F> usize max_right(usize l, const F& f) {
assert(l <= internal_size);
assert(f(M::zero()));
if (l == internal_size) return internal_size;
l += seg_size;
for (const usize d : revrep(1, logn + 1)) flush(l >> d);
M sum = M::zero();
do {
while (!(l & 1)) l >>= 1;
if (!f(sum + data[l])) {
while (l < seg_size) {
flush(l);
l = 2 * l;
if (f(sum + data[l])) sum = sum + data[l++];
}
return l - seg_size;
}
sum = sum + data[l++];
} while ((l & -l) != l);
return internal_size;
}
template <class F> usize min_left(usize r, const F& f) {
assert(r <= internal_size);
assert(f(M::zero()));
if (r == 0) return 0;
r += seg_size;
for (const usize d : revrep(1, logn + 1)) flush((r - 1) >> d);
M sum = M::zero();
do {
r -= 1;
while (r > 1 and (r & 1)) r >>= 1;
if (!f(data[r] + sum)) {
while (r < seg_size) {
flush(r);
r = 2 * r + 1;
if (f(data[r] + sum)) sum = data[r--] + sum;
}
return r + 1 - seg_size;
}
sum = data[r] + sum;
} while ((r & -r) != r);
return 0;
}
};
template <class T> using Vec = std::vector<T>;
struct Monoid {
u32 max, base;
static Monoid zero() { return Monoid{0, 0}; }
Monoid operator+(const Monoid& other) const { return Monoid{std::max(max, other.max), std::max(base, other.base)}; }
};
struct Effector {
u32 add;
static Effector one() { return Effector{0}; }
Effector operator*(const Effector& other) const { return Effector{add + other.add}; }
};
Monoid operator*(const Monoid& m, const Effector& e) { return Monoid{std::max(m.max, m.base + e.add), m.base}; }
void JOI19_jumps_main() {
usize N;
std::cin >> N;
Vec<u32> A(N);
for (auto& x : A) {
std::cin >> x;
}
Vec<Vec<usize>> cand(N);
std::stack<usize> stack;
for (const auto i : rep(0, N)) {
while (!stack.empty() and A[stack.top()] <= A[i]) {
const auto j = stack.top();
stack.pop();
cand[j].push_back(i);
}
if (!stack.empty()) {
const auto j = stack.top();
cand[j].push_back(i);
}
stack.push(i);
}
usize Q;
std::cin >> Q;
Vec<Vec<std::pair<usize, usize>>> query(N);
for (const auto i : rep(0, Q)) {
usize l, r;
std::cin >> l >> r;
l -= 1;
query[l].emplace_back(i, r);
}
LazySegmentTree<Monoid, Effector> seg(N);
for (const auto i : rep(0, N)) {
seg.assign(i, Monoid{0, A[i]});
}
Vec<u32> ans(Q);
for (const auto l : revrep(0, N)) {
for (const auto m : cand[l]) {
const auto r = 2 * m - l;
if (r < N) {
seg.operate(r, N, Effector{A[l] + A[m]});
}
}
for (const auto [i, r] : query[l]) {
ans[i] = seg.fold(l + 2, r).max;
}
}
for (const auto x : ans) {
std::cout << x << '\n';
}
}
int main() {
std::ios_base::sync_with_stdio(false);
std::cin.tie(nullptr);
JOI19_jumps_main();
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
204 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
204 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
217 ms |
26304 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
204 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
