oj.uz

Submission #1075257

# Submission time Handle Problem Language Result Execution time Memory
1075257 2024-08-25T21:40:36 Z ArthuroWich Sorting (IOI15_sorting) C++17
100 / 100
 162 ms 32224 KB 
#include "sorting.h"
#include<bits/stdc++.h>
using namespace std;
vector<pair<int, int>> ans, xy, swaps;
bool check(vector<int> p, int m, int n) {
    int s = 0;
    vector<int> e = p;
    vector<int> co(n, 0);
    for (int i = 0; i < n; i++) {
        co[p[i]] = i;
    }
    for (int i = 0; i < m; i++) {
        swap(p[xy[i].first], p[xy[i].second]);
    }
    for (int i = 0; i < n; i++) {
        if (p[i] == i) {
            continue;
        }
        while(p[i] != i) {
            int j = p[i];
            swaps.push_back({p[i], p[j]});
            swap(p[i], p[j]);
            s++;
        }
    }
    if (swaps.size() > m) {
        return 0;
    }
    while(swaps.size() < m) {
        swaps.push_back({0, 0});
    }
    for (int i = 0; i < m; i++) {
        swap(co[e[xy[i].first]], co[e[xy[i].second]]);
        swap(e[xy[i].first], e[xy[i].second]);
        auto [x, y] = swaps[i];
        swaps[i] = {co[x], co[y]};
        swap(e[co[x]], e[co[y]]);
        swap(co[x], co[y]);
    }
    return s <= m;
}
int findSwapPairs(int n, int A[], int M, int X[], int Y[], int P[], int Q[]) {
    vector<int> p(n);
    for (int i = 0; i < n; i++) {
        p[i] = A[i];
    }
    for (int i = 0; i < M; i++) {
        xy.push_back({X[i], Y[i]});
    }
    int l = 0, r = M;
    while(l < r) {
        int m = (l+r)/2;
        swaps.clear();
        if (check(p, m, n)) {
            r = m;
            ans = swaps;
        } else {
            l = m+1;
        }
    }
    for (int i = 0; i < ans.size(); i++) {
        P[i] = ans[i].first;
        Q[i] = ans[i].second;
    }
    return ans.size();
}

Compilation message

sorting.cpp: In function 'bool check(std::vector<int>, int, int)':
sorting.cpp:26:22: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   26 |     if (swaps.size() > m) {
      |         ~~~~~~~~~~~~~^~~
sorting.cpp:29:24: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   29 |     while(swaps.size() < m) {
      |           ~~~~~~~~~~~~~^~~
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:61:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for (int i = 0; i < ans.size(); i++) {
      |                     ~~^~~~~~~~~~~~
sorting.cpp:65:20: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   65 |     return ans.size();
      |            ~~~~~~~~^~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 344 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 432 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 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 344 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 432 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 444 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 1 ms 348 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 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 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 344 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 432 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 444 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 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 860 KB Output is correct
22 Correct 1 ms 860 KB Output is correct
23 Correct 2 ms 860 KB Output is correct
24 Correct 2 ms 856 KB Output is correct
25 Correct 1 ms 860 KB Output is correct
26 Correct 1 ms 860 KB Output is correct
27 Correct 1 ms 860 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 628 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 704 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 608 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 2 ms 604 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 488 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 628 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 704 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 608 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 2 ms 604 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 1 ms 488 KB Output is correct
15 Correct 141 ms 28408 KB Output is correct
16 Correct 162 ms 28740 KB Output is correct
17 Correct 157 ms 30532 KB Output is correct
18 Correct 69 ms 26812 KB Output is correct
19 Correct 112 ms 29364 KB Output is correct
20 Correct 117 ms 30108 KB Output is correct
21 Correct 121 ms 30220 KB Output is correct
22 Correct 131 ms 25528 KB Output is correct
23 Correct 155 ms 30888 KB Output is correct
24 Correct 155 ms 30908 KB Output is correct
25 Correct 157 ms 30912 KB Output is correct
26 Correct 118 ms 30112 KB Output is correct
27 Correct 109 ms 29340 KB Output is correct
28 Correct 147 ms 30468 KB Output is correct
29 Correct 150 ms 30652 KB Output is correct
30 Correct 91 ms 29020 KB Output is correct
31 Correct 157 ms 31304 KB Output is correct
32 Correct 142 ms 30084 KB Output is correct
33 Correct 153 ms 31176 KB Output is correct
34 Correct 153 ms 30652 KB Output is correct
35 Correct 120 ms 29084 KB Output is correct
36 Correct 57 ms 28604 KB Output is correct
37 Correct 156 ms 32224 KB Output is correct
38 Correct 147 ms 30872 KB Output is correct
39 Correct 155 ms 31420 KB Output is correct