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Submission #314952

# Submission time Handle Problem Language Result Execution time Memory
314952 2020-10-21T16:58:36 Z tengiz05 Sorting (IOI15_sorting) C++17
100 / 100
 340 ms 29000 KB 
#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 6e5+5;
int n, m;
int x[N], y[N], pos[N], a[N], orig[N];
vector<pair<int, int>> v, v1;
bool check(int mid){
	v.clear();v1.clear();
	for(int i=0;i<mid;i++){
		swap(a[x[i]], a[y[i]]);
	}for(int i=0;i<n;i++)pos[a[i]] = i;
	int ans = 0;
	for(int i=0;i<n;i++){
		if(pos[i] == i){
			continue;
		}else {
			ans++;
			int f = i, s = pos[i];
			v1.push_back({a[f], a[s]});
			swap(a[f], a[s]);
			swap(pos[a[f]], pos[a[s]]);
		}
	}
	if(ans > mid)return 0;
	int j=0;
	for(int i=0;i<n;i++)a[i] = orig[i], pos[orig[i]] = i;
	for(int i=0;i<mid;i++){
		if(j >= v1.size())v.push_back({0,0});
		else {
			swap(a[x[i]], a[y[i]]);
			swap(pos[a[x[i]]], pos[a[y[i]]]);
			int f = v1[j].first, s = v1[j].second;
			v.push_back({pos[f], pos[s]});
			swap(a[pos[f]], a[pos[s]]);
			swap(pos[a[pos[f]]], pos[a[pos[s]]]);
		}j++;
	}return 1;
}
int findSwapPairs(int NN, int A[], int MM, int X[], int Y[], int P[], int Q[]) {
	n = NN, m = MM;
	int l = -1, r = m;
	for(int i=0;i<m;i++){
		x[i] = X[i];
		y[i] = Y[i];
	}
	while(l+1 < r){
		for(int i=0;i<n;i++)a[i] = A[i], orig[i] = A[i];
		int mid = (l+r)/2;
		if(check(mid)){
			r = mid;
		}else {
			l = mid;
		}
	}for(int i=0;i<n;i++)a[i] = A[i];
	check(r);
	for(int i=0;i<r;i++){
		if(i < v.size()){
			P[i] = v[i].first;
			Q[i] = v[i].second;
		}else {
			P[i] = Q[i] = 0;
		}
	}
	return r;
}

Compilation message

sorting.cpp: In function 'bool check(int)':
sorting.cpp:29:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |   if(j >= v1.size())v.push_back({0,0});
      |      ~~^~~~~~~~~~~~
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:58:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |   if(i < v.size()){
      |      ~~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 0 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 0 ms 384 KB Output is correct
21 Correct 2 ms 768 KB Output is correct
22 Correct 2 ms 768 KB Output is correct
23 Correct 2 ms 768 KB Output is correct
24 Correct 2 ms 768 KB Output is correct
25 Correct 1 ms 768 KB Output is correct
26 Correct 2 ms 768 KB Output is correct
27 Correct 2 ms 672 KB Output is correct

Subtask #5
20.0 / 20.0

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

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 512 KB Output is correct
2 Correct 2 ms 640 KB Output is correct
3 Correct 2 ms 640 KB Output is correct
4 Correct 1 ms 512 KB Output is correct
5 Correct 1 ms 512 KB Output is correct
6 Correct 2 ms 512 KB Output is correct
7 Correct 2 ms 640 KB Output is correct
8 Correct 2 ms 640 KB Output is correct
9 Correct 2 ms 640 KB Output is correct
10 Correct 2 ms 640 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 1 ms 512 KB Output is correct
15 Correct 241 ms 18784 KB Output is correct
16 Correct 292 ms 26336 KB Output is correct
17 Correct 306 ms 27104 KB Output is correct
18 Correct 125 ms 24424 KB Output is correct
19 Correct 218 ms 25336 KB Output is correct
20 Correct 238 ms 25952 KB Output is correct
21 Correct 223 ms 25952 KB Output is correct
22 Correct 251 ms 23904 KB Output is correct
23 Correct 274 ms 27876 KB Output is correct
24 Correct 339 ms 27616 KB Output is correct
25 Correct 340 ms 27236 KB Output is correct
26 Correct 223 ms 25304 KB Output is correct
27 Correct 203 ms 24540 KB Output is correct
28 Correct 295 ms 27184 KB Output is correct
29 Correct 315 ms 26720 KB Output is correct
30 Correct 160 ms 25192 KB Output is correct
31 Correct 323 ms 27984 KB Output is correct
32 Correct 279 ms 28128 KB Output is correct
33 Correct 338 ms 28384 KB Output is correct
34 Correct 294 ms 28512 KB Output is correct
35 Correct 227 ms 26208 KB Output is correct
36 Correct 86 ms 24936 KB Output is correct
37 Correct 333 ms 29000 KB Output is correct
38 Correct 314 ms 28128 KB Output is correct
39 Correct 328 ms 28256 KB Output is correct