This commit is contained in:
Zengtudor 2024-09-07 00:06:31 +08:00
parent 48b958c476
commit ab63237116
3 changed files with 72 additions and 2 deletions

52
20240906/bitset.cpp Normal file
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@ -0,0 +1,52 @@
#include <array>
#include <climits>
#include <cstddef>
#include <format>
#include <iostream>
#include <vector>
using namespace std;
typedef unsigned int u8;
typedef int i8;
const u8 MAX = 1e5+1;
constexpr std::array<u8, (size_t)MAX> initLog2(){
std::array<u8, (size_t)MAX> log2{};
log2[1]=0;
for(int i=2;i<=(int)MAX-1;i++){
log2[i]=log2[i/2]+1;
}
return log2;
}
class BitIntSet{
private:
constexpr static const std::array<u8, (size_t)MAX> log2=initLog2();
public:
i8 data;
explicit BitIntSet(i8 n):data{n}{
// checkLog2IsInitalized();
}
int getLowbit()const{
return this->data&((~this->data)+1);
}
int getLowbit(u8 n)const{
return n&((~n)+1);
}
std::vector<u8> get1Dir()const{
std::vector<u8> ret;
int temp=this->data;
while(temp>0){
ret.push_back(log2[this->getLowbit()]);
temp-=getLowbit(temp);
}
return ret;
}
};
int main(){
BitIntSet b(10);
std::cout<<std::format("{0}.getLowbit()={1}\n{0}.get1Dir()={2}",b.data,b.getLowbit(),b.getLowbit());
}

10
test.cpp Normal file
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#include <iostream>
using namespace std;
int main(){
unsigned int a{};
for(;;){a++;}
cout<<a<<endl;
}

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@ -5,8 +5,10 @@ if is_mode("debug") then
end end
if is_mode("release") then if is_mode("release") then
add_cxxflags("-march=native") add_cxxflags("-march=native")
add_cxxflags("-fconstexpr-loop-limit=2147483647")
add_cxxflags("-fconstexpr-ops-limit=2147483647")
end end
set_languages("c++17") set_languages("c++23")
set_warnings("all") set_warnings("all")
target("P1158") target("P1158")
@ -38,4 +40,10 @@ target("P2661")
add_files("20240830/P2661/P2661.cpp") add_files("20240830/P2661/P2661.cpp")
target("6261") target("6261")
add_files("20240901/6261/6261.cpp") add_files("20240901/6261/6261.cpp")
target("test")
add_files("test.cpp")
target("bitset")
add_files("20240906/bitset.cpp")