71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
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#include<bits/stdc++.h>
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using std::swap,std::cin,std::cout,std::ostream,std::endl,std::next_permutation;
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typedef unsigned int u32;
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typedef int i32;
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typedef size_t usize;
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#define PRINT_VALUE(v){cout<<#v<<" : "<<v<<endl;}
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template<typename T,usize S>
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struct Array{
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T arr[S];
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usize size;
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Array():size(S){};
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T& operator[](usize index){return arr[index];}
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const T& operator[](usize index)const{return arr[index];}
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friend ostream& operator<<(ostream &os,Array<T, S> &a){
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cout<<"Array<T,S> [";
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for(usize i=0;i<a.size;i++){
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cout<<a[i]<<(i!=a.size-1?",":"]");
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}
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return os;
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}
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T* begin(){
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return this->arr;
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}
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T* end(){
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return this->arr+this->size;
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}
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};
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int cnt = 0;
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int partition(int l, int r,int a[]) {
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cnt += r-l+1;
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swap(a[l], a[(l+r)/2]);
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int i = l+1, j = r, x = a[l];
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while(1){
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while(a[i]<x && i<=r) i++;
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while(a[j]>x && j>=l+1) j--;
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if(i>=j) break;
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swap(a[i],a[j]);
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i++;j--;
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}
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swap(a[l],a[j]);
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return j;
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}
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void qsort(int l, int r,int a[]){
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if(l >= r) return;
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int m = partition(l,r,a);//分
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qsort(l,m-1,a);//解
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qsort(m+1,r,a);
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}
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int main(){
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const i32 n=5;
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Array<int, n+1> arr;
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for(usize i =1;i<arr.size;i++){
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arr[i]=i;
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}
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do{
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cnt=0;
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auto a=arr;
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PRINT_VALUE(a);
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qsort(1,a.size-1,a.begin());
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PRINT_VALUE(a);
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PRINT_VALUE(cnt);
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cout<<"-----------next term---------\n";
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}while(next_permutation(arr.begin(),arr.end()));
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}
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