제출 #600242

#제출 시각UTC-0아이디문제언어결과실행 시간메모리
6002422022-07-20 14:52:53MilosMilutinovicHacker (BOI15_hac)C++14
100 / 100
157 ms86708 KiB
/**
* author: wxhtzdy
* created: 20.07.2022 16:47:00
**/
#include <bits/stdc++.h>
using namespace std;
// usage:
// auto fun = [&](int i, int j) { return min(i, j); };
// SparseTable<int, decltype(fun)> st(a, fun);
// or:
// SparseTable<int> st(a, [&](int i, int j) { return min(i, j); });
template <typename T, class F = function<T(const T&, const T&)>>
class SparseTable {
public:
int n;
vector<vector<T>> mat;
F func;
SparseTable(const vector<T>& a, const F& f) : func(f) {
n = static_cast<int>(a.size());
int max_log = 32 - __builtin_clz(n);
mat.resize(max_log);
mat[0] = a;
for (int j = 1; j < max_log; j++) {
mat[j].resize(n - (1 << j) + 1);
for (int i = 0; i <= n - (1 << j); i++) {
mat[j][i] = func(mat[j - 1][i], mat[j - 1][i + (1 << (j - 1))]);
}
 
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