oj.uz

Submission #873398

# Submission time Handle Problem Language Result Execution time Memory
873398 2023-11-15T02:32:12 Z anha3k25cvp Swap (BOI16_swap) C++14
100 / 100
 606 ms 227664 KB 
#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define dl double
#define st first
#define nd second
#define II pair <int, int>

using namespace std;

const int N = 5 + 1e5;
const int inf = 7 + 1e9;

vector <int> a, v1, v2;
vector <vector <bool>> f;
vector <vector <vector <int>>> g;

void Merge(vector <int> &a, vector <int> &b, vector <int> &c) {
    for (int i = 0, j = 0, l = 1; i < b.size() || j < c.size(); i += l, j += l, l *= 2) {
        for (int pos = 0; pos < l && i + pos < b.size(); pos ++)
            a.push_back(b[i + pos]);
        for (int pos = 0; pos < l && j + pos < c.size(); pos ++)
            a.push_back(c[j + pos]);
    }
}

int main() {
#define TASKNAME ""
    ios_base :: sync_with_stdio (0);
    cin.tie (0);
    if ( fopen( TASKNAME".inp", "r" ) ) {
        freopen (TASKNAME".inp", "r", stdin);
        freopen (TASKNAME".out", "w", stdout);
    }
    int n;
    cin >> n;
    a.assign(n + 1, 0);
    for (int i = 1; i <= n; i ++)
        cin >> a[i];
    int logn;
    for (logn = 1; (1 << logn) <= n; logn ++);
    logn *= 2;
    f.assign(logn, vector <bool> (n + 1, 0));
    f[0][1] = 1;
    for (int i = 1; i * 2 + 1 <= n; i ++)
        for (int j = 0; j < logn; j ++)
            if (f[j][i]) {
                int pos = i >> j / 2 ^ j & 1;
                if (a[2 * i + 1] < a[pos] && a[2 * i + 1] < a[2 * i])
                    f[j + 2][2 * i] = f[0][2 * i] = f[j + 2][2 * i + 1] = f[1][2 * i + 1] = 1;
                else if (a[2 * i] < a[pos])
                    f[j + 2][2 * i] = f[0][2 * i + 1] = 1;
                else
                    f[0][2 * i] = f[0][2 * i + 1] = 1;
            }
    g.assign(logn, vector <vector <int>> (n + 1));
    for (int i = n; i > 0; i --) {
        for (int j = 0; j < logn; j ++)
            if (f[j][i]) {
                int pos = i >> j / 2 ^ j & 1;
                if (2 * i + 1 <= n) {
                    if (a[2 * i + 1] < a[pos] && a[2 * i + 1] < a[2 * i]) {
                        v1 = {a[2 * i + 1]};
                        v2 = {a[2 * i + 1]};
                        Merge(v1, g[j + 2][2 * i], g[1][2 * i + 1]);
                        Merge(v2, g[0][2 * i], g[j + 2][2 * i + 1]);
                        g[j][i] = min(v1, v2);
                    }
                    else if (a[2 * i] < a[pos]) {
                        g[j][i].push_back(a[2 * i]);
                        Merge(g[j][i], g[j + 2][2 * i], g[0][2 * i + 1]);
                    }
                    else {
                        g[j][i].push_back(a[pos]);
                        Merge(g[j][i], g[0][2 * i], g[0][2 * i + 1]);
                    }
                }
                else if (i * 2 <= n)
                    g[j][i] = {min(a[pos], a[2 * i]), max(a[pos], a[2 * i])};
                else
                    g[j][i] = {a[pos]};
            }
        if (2 * i + 1 <= n)
            for (int val = 0; val < 2; val ++)
                for (int j = 0; j < logn; j ++)
                    if (f[j][2 * i + val])
                        vector <int> ().swap(g[j][2 * i + val]);
    }
    for (int u : g[0][1])
        cout << u << ' ';
    return 0;
}

Compilation message

swap.cpp: In function 'void Merge(std::vector<int>&, std::vector<int>&, std::vector<int>&)':
swap.cpp:19:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for (int i = 0, j = 0, l = 1; i < b.size() || j < c.size(); i += l, j += l, l *= 2) {
      |                                   ~~^~~~~~~~~~
swap.cpp:19:53: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for (int i = 0, j = 0, l = 1; i < b.size() || j < c.size(); i += l, j += l, l *= 2) {
      |                                                   ~~^~~~~~~~~~
swap.cpp:20:46: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |         for (int pos = 0; pos < l && i + pos < b.size(); pos ++)
      |                                      ~~~~~~~~^~~~~~~~~~
swap.cpp:22:46: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |         for (int pos = 0; pos < l && j + pos < c.size(); pos ++)
      |                                      ~~~~~~~~^~~~~~~~~~
swap.cpp: In function 'int main()':
swap.cpp:48:42: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   48 |                 int pos = i >> j / 2 ^ j & 1;
      |                                        ~~^~~
swap.cpp:60:42: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   60 |                 int pos = i >> j / 2 ^ j & 1;
      |                                        ~~^~~
swap.cpp:32:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         freopen (TASKNAME".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
swap.cpp:33:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |         freopen (TASKNAME".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 600 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 0 ms 344 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 600 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 0 ms 344 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 600 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 0 ms 344 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 50 ms 40892 KB Output is correct
17 Correct 50 ms 40660 KB Output is correct
18 Correct 49 ms 40896 KB Output is correct
19 Correct 123 ms 50624 KB Output is correct
20 Correct 118 ms 50472 KB Output is correct

Subtask #5
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 600 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 0 ms 344 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 50 ms 40892 KB Output is correct
17 Correct 50 ms 40660 KB Output is correct
18 Correct 49 ms 40896 KB Output is correct
19 Correct 123 ms 50624 KB Output is correct
20 Correct 118 ms 50472 KB Output is correct
21 Correct 195 ms 180740 KB Output is correct
22 Correct 217 ms 182548 KB Output is correct
23 Correct 194 ms 181248 KB Output is correct
24 Correct 606 ms 227664 KB Output is correct
25 Correct 588 ms 227584 KB Output is correct