Submission #572153

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
572153	2022-06-03 19:24:25	Hanksburger	Sorting (IOI15_sorting)	C++17	100 / 100	419 ms	21852 KiB

sorting

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#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;
int a[200005], b[200005], c[200005], d[200005];
int findSwapPairs(int n, int s[], int m, int x[], int y[], int p[], int q[])
{
    int l=0, r=m, mid, cur;
    while (l<r)
    {
        mid=(l+r)/2;
        for (int i=0; i<n; i++)
        {
            a[i]=b[i]=i;
            c[i]=s[i];
            d[s[i]]=i;
        }
        for (int i=mid-1; i>=0; i--)
        {
            swap(a[x[i]], a[y[i]]);
            swap(b[a[x[i]]], b[a[y[i]]]);
        }
        cur=0;
        for (int i=0; i<mid; i++)
        {
            swap(a[x[i]], a[y[i]]);
            swap(b[a[x[i]]], b[a[y[i]]]);
            swap(c[x[i]], c[y[i]]);
            swap(d[c[x[i]]], d[c[y[i]]]);
            while (cur<=n && b[cur]==d[cur])
                cur++;
 
 
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• Subtask 1: 8 / 8
• Subtask 2: 12 / 12
• Subtask 3: 16 / 16
• Subtask 4: 18 / 18
• Subtask 5: 20 / 20
• Subtask 6: 26 / 26