Submission #1098441

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1098441	2024-10-09T11:45:58 Z	alexander707070	Sorting (IOI15_sorting)	C++14	54 / 100	1 ms	656 KB

sorting

#include<bits/stdc++.h>
#include "sorting.h"

#define MAXN 200007
using namespace std;

int n,m,q,br;
int pos[MAXN],s[MAXN],post[MAXN];

int to[MAXN];

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    n=N; m=M;

	int stop=n;

		for(int i=0;i<n;i++)s[i]=i;
		for(int i=0;i<stop;i++)swap(s[X[i]],s[Y[i]]);

		for(int i=0;i<n;i++)to[s[i]]=i;
		for(int i=0;i<n;i++){
			s[i]=S[i]; pos[s[i]]=i;
			post[to[i]]=i;
		}

		int pt=0;
		for(int i=0;i<stop;i++){
			P[i]=Q[i]=0;

			swap(s[X[i]],s[Y[i]]);
			swap(to[X[i]],to[Y[i]]);

			swap(pos[s[X[i]]],pos[s[Y[i]]]);
			swap(post[to[X[i]]],post[to[Y[i]]]);

			while(pt<n and to[pos[pt]]==pt)pt++;
			if(pt==n)continue;

			P[i]=pos[pt]; Q[i]=post[pt];

			swap(s[P[i]],s[Q[i]]);
			swap(pos[s[P[i]]],pos[s[Q[i]]]);
		}

		q=stop; br=0;
		for(int i=0;i<n;i++){
			s[i]=S[i];
			if(s[i]==i)br++;
		}

		for(int i=0;i<stop;i++){
			if(br==n)return i;

			if(s[X[i]]==X[i])br--;
			if(s[Y[i]]==Y[i])br--;

			swap(s[X[i]],s[Y[i]]);

			if(s[X[i]]==X[i])br++;
			if(s[Y[i]]==Y[i])br++;

			if(s[P[i]]==P[i])br--;
			if(s[Q[i]]==Q[i])br--;
			
			swap(s[P[i]],s[Q[i]]);

			if(s[P[i]]==P[i])br++;
			if(s[Q[i]]==Q[i])br++;
		}

		if(br==n)return q;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:72:1: warning: control reaches end of non-void function [-Wreturn-type]
   72 | }
      | ^

Subtask #1

8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct

Subtask #2

12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct

Subtask #3

16.0 / 16.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	1 ms	456 KB	Output is correct
4	Correct	0 ms	456 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct

Subtask #4

18.0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	1 ms	456 KB	Output is correct
16	Correct	0 ms	456 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	1 ms	656 KB	Output is correct
22	Correct	1 ms	604 KB	Output is correct
23	Correct	1 ms	604 KB	Output is correct
24	Correct	1 ms	604 KB	Output is correct
25	Correct	1 ms	604 KB	Output is correct
26	Correct	1 ms	604 KB	Output is correct
27	Correct	1 ms	604 KB	Output is correct

Subtask #5

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	604 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #6

0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	604 KB	Output isn't correct
2	Halted	0 ms	0 KB	-