Submission #138246

#	Time	Username	Problem	Language	Result	Execution time	Memory
138246		MvC	Sorting (IOI15_sorting)	C++11	0 / 100	3 ms	504 KiB

sorting

#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include<bits/stdc++.h>
#include "sorting.h"
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=1e6+50;
const int mod=1e9+7;
using namespace std;
int s[nmax],x[nmax],y[nmax],p[nmax],px[nmax],py[nmax],cr[nmax],i,n,m,ss[nmax],vl[nmax];
//int rx[nmax],ry[nmax];
int findSwapPairs(int N,int S[],int M,int X[],int Y[],int rx[],int ry[])
{
	n=N,m=M;
	for(i=0;i<n;i++)s[i]=S[i];
	for(i=0;i<m;i++)
	{
		x[i]=X[i];
		y[i]=Y[i];
	}
	for(i=0;i<n;i++)
	{
		p[i]=i;
		px[s[i]]=i;
		py[i]=i;
		ss[i]=s[i];
		vl[i]=s[i];
		cr[i]=i;
	}
	for(i=0;i<n;i++)
	{
		swap(p[x[i]],p[y[i]]);
		rx[i]=ry[i]=0;
	}
	for(i=0;i<n;i++)
	{
		swap(py[x[i]],py[y[i]]);
		cr[py[x[i]]]=x[i];
		cr[py[y[i]]]=y[i];
		rx[i]=cr[p[i]];
		ry[i]=cr[px[i]];
		swap(px[i],px[ss[p[i]]]);
		swap(ss[px[ss[p[i]]]],ss[p[i]]);
	}
	return n;
}
/*int findSwapPairs(int N,int S[],int M,int X[],int Y[],int rx[],int ry[])
{
	n=N,m=M;
	for(i=0;i<n;i++)s[i]=S[i];
	for(i=0;i<m;i++)
	{
		x[i]=X[i];
		y[i]=Y[i];
	}
	for(i=0;i<n;i++)
	{
		p[s[i]]=i;
	}
	int j=0;
	for(i=0;i<n;i++)
	{
		//swap(s[x[i]],s[y[i]]);
		//p[s[x[i]]]=x[i];
		//p[s[y[i]]]=y[i];
		if(p[i]==i)continue;
		rx[j]=p[i];
		ry[j]=i;
		j++;
		swap(s[i],s[p[i]]);
		swap(p[s[i]],p[s[p[i]]]);
	}
	return j;
}
/*
7 7
0 5 3 6 1 2 4
0 0
0 0
0 0
0 0
0 0
0 0
0 0

int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m;
	for(i=0;i<n;i++)cin>>s[i];
	for(i=0;i<m;i++)cin>>x[i]>>y[i];
	for(i=0;i<n;i++)
	{
		p[s[i]]=i;
	}
	for(i=0;i<n;i++)
	{
		//swap(s[x[i]],s[y[i]]);
		//p[s[x[i]]]=x[i];
		//p[s[y[i]]]=y[i];
		rx[i]=p[i];
		ry[i]=i;
		cout<<rx[i]<<" "<<ry[i]<<endl;
		swap(s[i],s[p[i]]);
		swap(p[s[i]],p[s[p[i]]]);
	}
	for(i=0;i<n;i++)cout<<s[i]<<" ";
	cout<<endl;
    return 0;
}
/*int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m;
	for(i=0;i<n;i++)cin>>s[i];
	for(i=0;i<m;i++)cin>>x[i]>>y[i];
	for(i=0;i<n;i++)
	{
		p[i]=i;
		px[s[i]]=i;
		py[i]=i;
		ss[i]=s[i];
		vl[i]=s[i];
		cr[i]=i;
	}
	for(i=0;i<n;i++)
	{
		swap(p[x[i]],p[y[i]]);
	}
	cout<<endl;
	for(i=0;i<n;i++)cout<<p[i]<<" ";
	cout<<endl;
	for(i=0;i<n;i++)
	{
		swap(py[x[i]],py[y[i]]);
		swap(vl[x[i]],vl[y[i]]);
		cr[py[x[i]]]=x[i];
		cr[py[y[i]]]=y[i];
		// p[i] - cr[p[i]] , px[i]    cr[px[i]]
		rx[i]=cr[p[i]];
		ry[i]=cr[px[i]];
		swap(vl[cr[p[i]]],vl[cr[px[i]]]);
		cout<<cr[p[i]]<<" "<<cr[px[i]]<<endl;
		swap(px[i],px[ss[p[i]]]);
		swap(ss[px[ss[p[i]]]],ss[p[i]]);
	}
	cout<<endl;
	for(i=0;i<n;i++)cout<<vl[i]<<" ";
	cout<<endl;
    return 0;
}
/*
5 6
4 3 2 1 0
0 1 
1 2
2 3
3 4
0 1
1 2

5 5
3 0 4 2 1
1 1
4 0
2 3
1 4
0 4
*/

Compilation message (stderr)

sorting.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
sorting.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")
 
sorting.cpp:87:1: warning: "/*" within comment [-Wcomment]
 /*
  
sorting.cpp:126:1: warning: "/*" within comment [-Wcomment]
 /*int main()
  
sorting.cpp:170:1: warning: "/*" within comment [-Wcomment]
 /*

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