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Submission #71569

# Submission time Handle Problem Language Result Execution time Memory
71569 2018-08-25T07:22:21 Z Sa1378 Sorting (IOI15_sorting) C++17
100 / 100
 312 ms 14440 KB 
#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;
#define N ((int)201*1000)

int b[N],pos[N];
bool mark[N];

int findSwapPairs(int n, int a[], int m, int x[], int y[], int p[], int q[])
{
	bool flg=1;
	for(int i=0;i<n;i++)if(a[i]!=i)flg=0;
	if(flg)return 0;
    int l=0,r=m+1;
	vector <pair<int,int> > res;
	while(l<r-1)
	{
		int mid=(l+r)/2;
		for(int i=0;i<n;i++)b[i]=a[i],mark[i]=0;
		for(int i=0;i<mid;i++)swap(b[x[i]],b[y[i]]);
		vector <pair<int,int> > vec;
		for(int i=0;i<n;i++)
			if(!mark[i])
			{
				mark[i]=1;
				if(b[i]==i)continue;
				int j=b[i];vec.push_back({i,j});
				while(!mark[j])
				{
					mark[j]=1;
					if(!mark[b[j]])vec.push_back({j,b[j]});
					j=b[j];
				}
			}
		if(vec.size()>mid)l=mid;
		else r=mid,res.swap(vec);
	}
	for(int i=0;i<n;i++)pos[a[i]]=i;
	for(int i=0;i<r;i++)
	{
		if(res.size()<=i){p[i]=q[i]=0;continue;}
		swap(pos[a[x[i]]],pos[a[y[i]]]);
		swap(a[x[i]],a[y[i]]);
		p[i]=pos[res[i].first];q[i]=pos[res[i].second];
		swap(pos[res[i].first],pos[res[i].second]);
		swap(a[pos[res[i].first]],a[pos[res[i].second]]);
	}
	return r;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:35:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(vec.size()>mid)l=mid;
      ~~~~~~~~~~^~~~
sorting.cpp:41:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(res.size()<=i){p[i]=q[i]=0;continue;}
      ~~~~~~~~~~^~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 256 KB Output is correct
7 Correct 3 ms 412 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 256 KB Output is correct
7 Correct 3 ms 412 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 256 KB Output is correct
7 Correct 3 ms 412 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 2 ms 356 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 3 ms 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 3 ms 256 KB Output is correct
20 Correct 3 ms 256 KB Output is correct
21 Correct 3 ms 512 KB Output is correct
22 Correct 3 ms 512 KB Output is correct
23 Correct 4 ms 512 KB Output is correct
24 Correct 3 ms 512 KB Output is correct
25 Correct 3 ms 512 KB Output is correct
26 Correct 2 ms 512 KB Output is correct
27 Correct 2 ms 512 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 512 KB Output is correct
7 Correct 4 ms 512 KB Output is correct
8 Correct 3 ms 508 KB Output is correct
9 Correct 4 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 4 ms 512 KB Output is correct
12 Correct 4 ms 640 KB Output is correct
13 Correct 3 ms 512 KB Output is correct
14 Correct 3 ms 384 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 512 KB Output is correct
7 Correct 4 ms 512 KB Output is correct
8 Correct 3 ms 508 KB Output is correct
9 Correct 4 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 4 ms 512 KB Output is correct
12 Correct 4 ms 640 KB Output is correct
13 Correct 3 ms 512 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 210 ms 13000 KB Output is correct
16 Correct 222 ms 13236 KB Output is correct
17 Correct 268 ms 13752 KB Output is correct
18 Correct 39 ms 5496 KB Output is correct
19 Correct 174 ms 11976 KB Output is correct
20 Correct 214 ms 12328 KB Output is correct
21 Correct 199 ms 12340 KB Output is correct
22 Correct 205 ms 13960 KB Output is correct
23 Correct 271 ms 14192 KB Output is correct
24 Correct 303 ms 14080 KB Output is correct
25 Correct 312 ms 13828 KB Output is correct
26 Correct 183 ms 11160 KB Output is correct
27 Correct 157 ms 11480 KB Output is correct
28 Correct 276 ms 13752 KB Output is correct
29 Correct 200 ms 13260 KB Output is correct
30 Correct 112 ms 9588 KB Output is correct
31 Correct 242 ms 13596 KB Output is correct
32 Correct 193 ms 13844 KB Output is correct
33 Correct 221 ms 14120 KB Output is correct
34 Correct 202 ms 13960 KB Output is correct
35 Correct 184 ms 11932 KB Output is correct
36 Correct 50 ms 7544 KB Output is correct
37 Correct 278 ms 14440 KB Output is correct
38 Correct 196 ms 13896 KB Output is correct
39 Correct 209 ms 14008 KB Output is correct