제출 #795908

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
795908	2023-07-27 21:38:50	erray	Two Currencies (JOI23_currencies)	C++17	30 / 100	340 ms	47136 KiB

currencies

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// author: erray
#include <bits/stdc++.h>
#ifdef DEBUG
  #include "debug.h"
#else
  #define debug(...) void(37)
#endif
using namespace std;
template<typename T, typename F = function<T(const T&, const T&)>> 
struct SparseTable {
  vector<vector<T>> a;
  int n;
  F op;
  SparseTable() { }
  SparseTable(vector<T> _a, F _op) : op(_op) {
    n = int(_a.size());
    int lg = 32 - __builtin_clz(n);
    a.resize(lg); 
    a[0] = _a;
    for (int j = 1; j < lg; ++j) {
      int size = n - (1 << j) + 1;
      a[j].resize(size);
      for (int i = 0; i < size; ++i) {
        a[j][i] = op(a[j - 1][i], a[j - 1][i + ((1 << (j - 1)))]);
      }
    }
  }
 
 
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