77 lines
1.6 KiB
C++
77 lines
1.6 KiB
C++
#include <any>
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#include <array>
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#include <cstddef>
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#include <iostream>
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#include <ostream>
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#include <vector>
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using namespace std;
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typedef unsigned int u8;
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typedef int i8;
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const u8 MAX = 1e5+1;
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constexpr std::array<u8, (size_t)MAX> initLog2() {
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std::array<u8, (size_t)MAX> log2{};
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log2[1] = 0;
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for (int i = 2; i <= (int)MAX - 1; i++) {
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log2[i] = log2[i / 2] + 1;
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}
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return log2;
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}
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class BitIntSet {
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private:
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constexpr static const std::array<u8, (size_t)MAX> log2 = initLog2();
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public:
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i8 data;
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constexpr explicit BitIntSet(i8 n) : data{n} {}
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constexpr int getLowbit() const {
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return this->data & ((~this->data) + 1);
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}
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constexpr int getLowbit(u8 n) const {
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return n & ((~n) + 1);
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}
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constexpr std::vector<u8> get1Dir() const {
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std::vector<u8> ret;
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int temp = this->data;
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while (temp != 0) {
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// #ifndef NDEBUG
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// std::cout<<std::format("[Debug]the lowbit of {} is {}\n",temp,getLowbit(temp));
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// #endif
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ret.push_back(log2[getLowbit(temp)]);
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temp -= getLowbit(temp);
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}
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return ret;
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}
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};
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auto getTypeName(std::any &a){
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return a.type().name();
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}
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template<class ...Args>
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void print(const Args&...args){
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((std::cout<<args),...);
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}
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template<typename... Args>
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void println(const Args&...args){
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((std::cout<<args<<" "),...);
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endl(std::cout);
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}
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int main() {
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int at =1;
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println(at,"b",123,"c");
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constexpr BitIntSet bit(257);
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constexpr auto a = bit.data,b=bit.getLowbit();
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auto c = bit.get1Dir();
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std::cout<<a<<" "<<b<<" "<<c[0]<<" "<<c[1]<<std::endl;
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}
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