Submission #1247756

#	Time	Username	Problem	Language	Result	Execution time	Memory
1247756		kl0989e	Sorting (IOI15_sorting)	C++20	0 / 100	1 ms	328 KiB

sorting

#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pi pair<int, int>
#define pl pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define fi first
#define se second
#define pb push_back
#define all(x) (x).begin(),(x).end()

bool check(int n, int s[], int r, int x[], int y[], int p[], int q[]) {
	for (int i=0; i<r; i++) {
		swap(s[x[i]],s[y[i]]);
		swap(s[p[i]],s[q[i]]);
	}
	bool ok=1;
	for (int i=0; i<n; i++) {
		ok&=(s[i]==i);
	}
	return ok;
}

int findSwapPairs(int n, int s[], int m, int x[], int y[], int p[], int q[]) {
	int ss[n];
	for (int i=0; i<n; i++) {
		ss[i]=s[i];
	}
	for (int i=0; i<n-1; i++) {
		p[i]=i;
		q[i]=find(s,s+n,i)-s;
		swap(s[p[i]],s[q[i]]);
	}
    /*vi loc(n);
	for (int i=0; i<n; i++) {
		loc[s[i]]=i;
	}
	for (int i=0; i<n-1; i++) {
		p[i]=loc[i];
		q[i]=i;
		swap(loc[i],loc[s[i]]);
		swap(s[i],s[loc[s[i]]]);
	}*/
	assert(check(n,ss,n-1,x,y,p,q));
	return n-1;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 20
• Subtask 6: 0 / 26