oj.uz

Submission #474198

# Submission time Handle Problem Language Result Execution time Memory
474198 2021-09-17T10:31:13 Z jwvg0425 Sorting (IOI15_sorting) C++17
54 / 100
 460 ms 1236 KB 
#include <stdio.h>
#include <vector>
#include <queue>
#include <algorithm>
#include <iostream>
#include <string>
#include <bitset>
#include <map>
#include <set>
#include <tuple>
#include <string.h>
#include <math.h>
#include <random>
#include <functional>
#include <assert.h>
#include <math.h>
#include "sorting.h"
#define all(x) (x).begin(), (x).end()
#define xx first
#define yy second

using namespace std;

template<typename T, typename Pr = less<T>>
using pq = priority_queue<T, vector<T>, Pr>;
using i64 = long long int;
using ii = pair<int, int>;
using ii64 = pair<i64, i64>;

bool sorted(vector<int> s)
{
	for (int i = 0; i < s.size(); i++)
		if (s[i] != i)
			return false;

	return true;
}

vector<ii> solve(vector<int> s, vector<ii> r)
{
	int n = s.size();
	int m = r.size();
	vector<ii> res;

	for (int i = 0; i < m && !sorted(s); i++)
	{
		vector<int> rev(n), idx(n);
		swap(s[r[i].xx], s[r[i].yy]);
		for (int j = 0; j < n; j++)
			rev[j] = j;

		for (int j = i + 1; j < m; j++)
			swap(rev[r[j].xx], rev[r[j].yy]);

		for (int j = 0; j < n; j++)
			idx[rev[j]] = j;

		// s[x] -> idx[x]
		bool f = false;
		for (int x = 0; x < n && !f; x++)
		{
			if (s[x] == idx[x])
				continue;

			int j = find(all(s), idx[x]) - s.begin();

			res.emplace_back(x, j);
			swap(s[x], s[j]);
			f = true;
		}

		if (!f)
			res.emplace_back(0, 0);
	}

	return res;
}

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[])
{
	vector<int> s(N);
	vector<ii> r(M);

	for (int i = 0; i < N; i++)
		s[i] = S[i];

	for (int i = 0; i < M; i++)
	{
		r[i].xx = X[i];
		r[i].yy = Y[i];
	}

	auto res = solve(s, r);

	for (int i = 0; i < res.size(); i++)
	{
		swap(s[X[i]], s[Y[i]]);
		swap(s[res[i].xx], s[res[i].yy]);
		P[i] = res[i].xx;
		Q[i] = res[i].yy;
	}

	if (!sorted(s))
	{
		int* p = nullptr;
		*p = 0xDEADBEEF;
	}

	return res.size();
}

Compilation message

sorting.cpp: In function 'bool sorted(std::vector<int>)':
sorting.cpp:32:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for (int i = 0; i < s.size(); i++)
      |                  ~~^~~~~~~~~~
sorting.cpp: In function 'std::vector<std::pair<int, int> > solve(std::vector<int>, std::vector<std::pair<int, int> >)':
sorting.cpp:41:16: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   41 |  int n = s.size();
      |          ~~~~~~^~
sorting.cpp:42:16: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   42 |  int m = r.size();
      |          ~~~~~~^~
sorting.cpp:65:33: warning: conversion from '__gnu_cxx::__normal_iterator<int*, std::vector<int> >::difference_type' {aka 'long int'} to 'int' may change value [-Wconversion]
   65 |    int j = find(all(s), idx[x]) - s.begin();
      |            ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:95:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |  for (int i = 0; i < res.size(); i++)
      |                  ~~^~~~~~~~~~~~
sorting.cpp:109:17: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
  109 |  return res.size();
      |         ~~~~~~~~^~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 2 ms 332 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Correct 2 ms 332 KB Output is correct
6 Correct 0 ms 204 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 2 ms 332 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 440 ms 912 KB Output is correct
22 Correct 441 ms 1236 KB Output is correct
23 Correct 460 ms 912 KB Output is correct
24 Correct 440 ms 940 KB Output is correct
25 Correct 455 ms 1164 KB Output is correct
26 Correct 455 ms 868 KB Output is correct
27 Correct 434 ms 1100 KB Output is correct

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 113 ms 580 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 113 ms 580 KB Output isn't correct
2 Halted 0 ms 0 KB -