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Submission #654851

# Submission time Handle Problem Language Result Execution time Memory
654851 2022-11-01T19:04:55 Z benjaminkleyn Sorting (IOI15_sorting) C++17
100 / 100
 203 ms 19324 KB 
#include <bits/stdc++.h>
#include "sorting.h"
using namespace std;
typedef long long ll;

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[])
{
    int lo = 0, hi = M;
    vector<int> s(N);
    vector<int> pos(N);
    vector<pair<int,int>> swaps;
    while (true)
    {
        int mid = (lo + hi) / 2;

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

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

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

        swaps.resize(0);
        for (int i = 0; i < N; i++)
            if (s[i] != i)
            {
                int x = i, y = pos[i];
                swaps.push_back({s[i], i});
                swap(s[x], s[y]);
                pos[s[x]] = x;
                pos[s[y]] = y;
            }

        if (lo == hi)
            break;

        if (swaps.size() <= mid)
            hi = mid;
        else
            lo = mid + 1;
    }

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

    for (int i = 0; i < swaps.size(); i++)
    {
        swap(pos[S[X[i]]], pos[S[Y[i]]]); 
        swap(S[X[i]], S[Y[i]]);
        P[i] = pos[swaps[i].first], Q[i] = pos[swaps[i].second];
        swap(pos[S[P[i]]], pos[S[Q[i]]]);
        swap(S[P[i]], S[Q[i]]);
    }
    for (int i = swaps.size(); i < hi; i++)
        P[i] = Q[i] = 0;

    return hi;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:39:26: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   39 |         if (swaps.size() <= mid)
      |             ~~~~~~~~~~~~~^~~~~~
sorting.cpp:48:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     for (int i = 0; i < swaps.size(); i++)
      |                     ~~^~~~~~~~~~~~~~
sorting.cpp:56:28: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   56 |     for (int i = swaps.size(); i < hi; i++)
      |                  ~~~~~~~~~~^~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 0 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 308 KB Output is correct
12 Correct 1 ms 340 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 292 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 300 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 308 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 1 ms 292 KB Output is correct
19 Correct 0 ms 304 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 1 ms 468 KB Output is correct
22 Correct 1 ms 436 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 428 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 2 ms 468 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 444 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 1 ms 440 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 440 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 444 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 1 ms 440 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 1 ms 440 KB Output is correct
15 Correct 159 ms 17008 KB Output is correct
16 Correct 172 ms 17448 KB Output is correct
17 Correct 182 ms 18428 KB Output is correct
18 Correct 70 ms 17060 KB Output is correct
19 Correct 138 ms 18032 KB Output is correct
20 Correct 139 ms 18496 KB Output is correct
21 Correct 143 ms 18620 KB Output is correct
22 Correct 154 ms 13632 KB Output is correct
23 Correct 194 ms 19060 KB Output is correct
24 Correct 173 ms 18788 KB Output is correct
25 Correct 183 ms 18568 KB Output is correct
26 Correct 139 ms 17960 KB Output is correct
27 Correct 125 ms 17332 KB Output is correct
28 Correct 183 ms 18676 KB Output is correct
29 Correct 172 ms 18420 KB Output is correct
30 Correct 101 ms 16948 KB Output is correct
31 Correct 177 ms 18736 KB Output is correct
32 Correct 181 ms 18512 KB Output is correct
33 Correct 203 ms 18964 KB Output is correct
34 Correct 189 ms 18692 KB Output is correct
35 Correct 144 ms 17744 KB Output is correct
36 Correct 58 ms 16232 KB Output is correct
37 Correct 200 ms 19324 KB Output is correct
38 Correct 196 ms 18624 KB Output is correct
39 Correct 191 ms 18780 KB Output is correct