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Submission #484623

# Submission time Handle Problem Language Result Execution time Memory
484623 2021-11-04T20:00:45 Z couplefire Sorting (IOI15_sorting) C++17
100 / 100
 164 ms 19408 KB 
#include <bits/stdc++.h>
using namespace std;

int findSwapPairs(int n, int arr[], int m, int x_moves[], int y_moves[], int x_ans[], int y_ans[]){
    vector<int> fin_arr(n), x_todo, y_todo;
    auto calc = [&](int mid)->int{
        x_todo.clear(); y_todo.clear();
        for(int i = 0; i<n; ++i) fin_arr[i] = arr[i];
        for(int i = 0; i<mid; ++i)
            swap(fin_arr[x_moves[i]], fin_arr[y_moves[i]]);
        for(int i = 0; i<n; ++i)
            while(fin_arr[i]!=i)
                x_todo.push_back(fin_arr[i]), y_todo.push_back(fin_arr[fin_arr[i]]), 
                swap(fin_arr[i], fin_arr[fin_arr[i]]);
        return (int)x_todo.size();
    };
    int lo = 0, hi = m;
    while(lo<hi){
        int mid = lo+(hi-lo)/2;
        if(calc(mid)<=mid) hi = mid;
        else lo = mid+1;
    } calc(lo); 
    while(x_todo.size()<lo)
        x_todo.push_back(0), y_todo.push_back(0);
    vector<int> pos(n);
    for(int i = 0; i<n; ++i)
        pos[arr[i]] = i;
    for(int i = 0; i<lo; ++i)
        swap(pos[arr[x_moves[i]]], pos[arr[y_moves[i]]]), swap(arr[x_moves[i]], arr[y_moves[i]]),
        x_ans[i] = pos[x_todo[i]], y_ans[i] = pos[y_todo[i]],
        swap(pos[arr[x_ans[i]]], pos[arr[y_ans[i]]]), swap(arr[x_ans[i]], arr[y_ans[i]]);
    return lo;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:23:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   23 |     while(x_todo.size()<lo)
      |           ~~~~~~~~~~~~~^~~

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 0 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 1 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 0 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 1 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 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 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 0 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 1 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 0 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 1 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 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 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 2 ms 460 KB Output is correct
22 Correct 1 ms 460 KB Output is correct
23 Correct 1 ms 460 KB Output is correct
24 Correct 1 ms 432 KB Output is correct
25 Correct 1 ms 460 KB Output is correct
26 Correct 1 ms 460 KB Output is correct
27 Correct 1 ms 460 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 428 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 332 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 460 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 428 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 140 ms 17144 KB Output is correct
16 Correct 138 ms 17456 KB Output is correct
17 Correct 151 ms 18448 KB Output is correct
18 Correct 56 ms 16320 KB Output is correct
19 Correct 110 ms 18116 KB Output is correct
20 Correct 117 ms 18608 KB Output is correct
21 Correct 116 ms 18636 KB Output is correct
22 Correct 123 ms 13752 KB Output is correct
23 Correct 158 ms 19120 KB Output is correct
24 Correct 159 ms 18996 KB Output is correct
25 Correct 152 ms 18656 KB Output is correct
26 Correct 111 ms 18128 KB Output is correct
27 Correct 98 ms 17360 KB Output is correct
28 Correct 153 ms 18736 KB Output is correct
29 Correct 148 ms 18296 KB Output is correct
30 Correct 81 ms 16960 KB Output is correct
31 Correct 155 ms 18776 KB Output is correct
32 Correct 144 ms 18432 KB Output is correct
33 Correct 157 ms 18864 KB Output is correct
34 Correct 163 ms 18760 KB Output is correct
35 Correct 116 ms 17808 KB Output is correct
36 Correct 47 ms 15812 KB Output is correct
37 Correct 164 ms 19408 KB Output is correct
38 Correct 157 ms 18608 KB Output is correct
39 Correct 157 ms 18756 KB Output is correct