37 lines
696 B
C++
37 lines
696 B
C++
#include<bits/stdc++.h>
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using namespace std;
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#define PRINT_VALUE(v){cout<<#v<<" :"<<v<<"\n";}
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int n, a[1005];
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int cnt = 0;
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int partition(int l, int r) {
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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){
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if(l >= r) return;
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int m = partition(l,r);//分
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qsort(l,m-1);//解
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qsort(m+1,r);
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}
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int main(){
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n = 1000;
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for(int i=1;i<=n;i++) cin>>a[i];
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PRINT_VALUE(cnt);
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qsort(1,n);
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PRINT_VALUE(cnt);
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return 0;
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} |