結果
| 問題 |
No.924 紲星
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-09-05 22:09:16 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
(最新)
AC
(最初)
|
| 実行時間 | - |
| コード長 | 5,430 bytes |
| コンパイル時間 | 2,066 ms |
| コンパイル使用メモリ | 187,728 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-09-15 05:26:06 |
| 合計ジャッジ時間 | 4,942 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 6 RE * 10 |
ソースコード
#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = long long;
using std::cout;
using std::endl;
using std::cin;
template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}
template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}
template<typename Monoid>
class segment_tree {
using value_type = Monoid;
using size_type = size_t;
using binary_function = std::function<value_type(value_type, value_type)>;
using checker = std::function<bool(value_type)>;
const size_type size_;
size_type height_;
const value_type id;
const binary_function bi_func;
std::vector<value_type> data;
private:
const size_type get_height(const size_type& size) const {
size_type height = 1;
while(1 << height < size) height++;
return height;
}
const size_type base_size() const {
return 1 << height_;
}
void meld(const size_type& index) {
data[index] = bi_func(data[index << 1 ^ 0], data[index << 1 ^ 1]);
}
public:
segment_tree(const size_type& size, const binary_function& bi_func, const value_type& id)
: size_(size),
bi_func(bi_func),
id(id) {
height_ = get_height(size);
data.assign(base_size() << 1, id);
}
value_type fold(size_type left, size_type right) {
value_type l_value = id,
r_value = id;
for(left += base_size(), right += base_size();
left < right;
left >>= 1, right >>= 1) {
if(left & 1) l_value = bi_func(l_value, data[left++]);
if(right & 1) r_value = bi_func(data[--right], r_value);
}
return bi_func(std::move(l_value), std::move(r_value));
}
void update(size_type index, const value_type& value) {
index += base_size();
data[index] = bi_func(data[index], value);
while(index >>= 1) meld(index);
}
void change(size_type index, const value_type& value) {
index += base_size();
data[index] = value;
while(index >>= 1) meld(index);
}
const size_type search(const size_type & left, const checker & check) {
value_type val = id;
size_t base_size_ = base_size();
auto find = [&](auto&& find, size_type k, size_type l, size_type r) -> int {
if(l + 1 == r) {
val = bi_func(val, data[k]);
return (check(val) ? k - base_size_ : -1);
}
const size_type mid = (l + r) >> 1;
if(mid <= left) return find(find, k << 1 ^ 1, mid, r);
if(left <= l and !check(bi_func(val, data[k]))) {
val = bi_func(val, data[k]);
return -1;
}
const int left_ret = find(find, k << 1 ^ 0, l, mid);
if(left_ret == -1) return find(find, k << 1 ^ 1, mid, r);
return left_ret;
};
return find(find, 1, 0, base_size_);
}
value_type operator[](const size_type& index) const {
return data[index + base_size()];
}
const size_type size() const {
return size_;
}
const bool empty() const {
return data.empty();
}
};
int main() {
// input
int n, q; scanf("%d%d", &n, &q);
assert(1 <= n and n <= 1e5);
assert(1 <= q and q <= 1e5);
std::vector<int> a(n);
for(int i = 0; i < n; i++) {
scanf("%d", &a[i]);
assert(-1e9 <= a[i] and a[i] <= 1e9);
}
std::vector<int> L(q), R(q);
for(int i = 0; i < q; i++) {
scanf("%d%d", &L[i], &R[i]);
assert(1 <= L[i] and L[i] <= n);
assert(1 <= R[i] and R[i] <= n);
assert(L[i] <= R[i]);
L[i]--;
}
// solve
std::vector<std::pair<int, int>> vec;
for(int i = 0; i < n; i++) vec.push_back({a[i], i});
sort(begin(vec), end(vec));
std::vector<i64> center = [&]{
using P = std::pair<int, int>;
std::vector<int> Left(q, -1), Right(q, n);
std::vector<std::pair<int, int>> query, nxt;
for(int i = 0; i < q; i++) query.push_back({(Left[i] + Right[i]) >> 1, i});
segment_tree<int> seg(n, [](int a, int b) { return a + b; }, 0);
while(!query.empty()) {
sort(begin(query), end(query));
int cur = 0;
for(int i = 0; i < n; i++) {
seg.update(vec[i].second, 1);
while(cur < query.size() and query[cur].first <= i) {
auto & p = query[cur++];
int id = p.second, mid = p.first;
int len = (R[id] - L[id] + 1) >> 1;
int val = seg.fold(L[id], R[id]);
if(len <= val) Right[id] = mid;
else Left[id] = mid;
if(Left[id] + 1 != Right[id])
nxt.push_back({(Left[id] + Right[id]) >> 1, id});
}
}
for(int i = 0; i < n; i++) seg.change(i, 0);
query.swap(nxt);
nxt.clear();
}
std::vector<i64> center(q);
for(int i = 0; i < q; i++) center[i] = vec[Left[i] + 1].first;
return center;
}();
std::vector<i64> ans = [&]{
std::vector<i64> ans(q);
for(int loop = 0; loop < 2; loop++) {
segment_tree<i64> seg(n, [](i64 a, i64 b) { return a + b; }, 0);
segment_tree<i64> cnt(n, [](i64 a, i64 b) { return a + b; }, 0);
std::vector<std::pair<int, int>> query;
for(int i = 0; i < q; i++) query.push_back({center[i], i});
sort(begin(query), end(query));
if(loop) reverse(begin(query), end(query));
int cur = 0;
for(int i = 0; i < n; i++) {
seg.update(vec[i].second, vec[i].first);
cnt.update(vec[i].second, 1);
while(cur < query.size() and query[cur].first == vec[i].first) {
auto & p = query[cur++];
i64 id = p.second, val = p.first;
i64 tmp = val * cnt.fold(L[id], R[id]) - seg.fold(L[id], R[id]);
ans[id] += tmp * (loop ? -1 : 1);
}
}
reverse(begin(vec), end(vec));
}
return ans;
}();
for(auto v: ans) printf("%lld\n", v);
return 0;
}