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Submission #245606

# Submission time Handle Problem Language Result Execution time Memory
245606 2020-07-07T00:47:27 Z thecodingwizard Swap (BOI16_swap) C++11
68 / 100
 387 ms 262144 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 200000;

int n, A[maxn+10];
vector<int> dp[maxn+10][36], tmp1, tmp2;

void merge(vector<int> &res, int root, vector<int> &L, vector<int> &R) {
    res.push_back(root);
    int lidx = 0, ridx = 0;
    int cur = 1;
    while (lidx < L.size() || ridx < R.size()) {
        for (int i = 0; i < cur; i++) {
            if (lidx < L.size()) res.push_back(L[lidx++]);
        }
        for (int i = 0; i < cur; i++) {
            if (ridx < R.size()) res.push_back(R[ridx++]);
        }
        cur *= 2;
    }
}

int main() {
    cin.tie(0); ios_base::sync_with_stdio(0);
    cin >> n; for (int i = 1; i <= n; i++) cin >> A[i];
    for (int i = n; i; i--) {
        int l = i*2, r = i*2+1;
        for (int j = 0; j < 36; j++) {
            int idx = i, p = j;
            while (p >= 2) {
                p -= 2;
                idx /= 2;
            }
            if (p == 1) idx *= 2;
            if (idx == 0) continue;

            int cur = A[idx];

            if (l > n && r > n) {
                dp[i][j].push_back(cur);
                continue;
            } else if (r > n) {
                if (A[l] < cur) {
                    dp[i][j].push_back(A[l]);
                    dp[i][j].push_back(cur);
                } else {
                    dp[i][j].push_back(cur);
                    dp[i][j].push_back(A[l]);
                }
                continue;
            }

            int L = A[l], R = A[r];
            // no swap
            if (cur < L && cur < R) {
                merge(dp[i][j], cur, dp[l][0], dp[r][0]);
                continue;
            }

            // swap left
            if (cur > L && L < R) {
                merge(dp[i][j], L, dp[l][j+2], dp[r][0]);
                continue;
            }

            if (R < cur && R < L) {
                tmp1 = {}, tmp2 = {};
                // swap right
                merge(tmp1, R, dp[l][0], dp[r][j+2]);
                // swap both
                merge(tmp2, R, dp[l][j+2], dp[r][3]);
                dp[i][j] = min(tmp1, tmp2);
            }
        }

        if (l <= n) {
            for (int j = 0; j < 36; j++) vector<int>().swap(dp[l][j]);
        }
        if (r <= n) {
            for (int j = 0; j < 36; j++) vector<int>().swap(dp[r][j]);
        }
    }
    for (int v : dp[1][0]) cout << v << " ";
    cout << "\n";
    return 0;
}

Compilation message

swap.cpp: In function 'void merge(std::vector<int>&, int, std::vector<int>&, std::vector<int>&)':
swap.cpp:14:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (lidx < L.size() || ridx < R.size()) {
            ~~~~~^~~~~~~~~~
swap.cpp:14:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (lidx < L.size() || ridx < R.size()) {
                               ~~~~~^~~~~~~~~~
swap.cpp:16:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (lidx < L.size()) res.push_back(L[lidx++]);
                 ~~~~~^~~~~~~~~~
swap.cpp:19:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (ridx < R.size()) res.push_back(R[ridx++]);
                 ~~~~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169340 KB Output is correct
2 Correct 105 ms 169456 KB Output is correct
3 Correct 104 ms 169440 KB Output is correct
4 Correct 113 ms 169484 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169340 KB Output is correct
2 Correct 105 ms 169456 KB Output is correct
3 Correct 104 ms 169440 KB Output is correct
4 Correct 113 ms 169484 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 104 ms 169464 KB Output is correct
7 Correct 106 ms 169488 KB Output is correct
8 Correct 111 ms 169464 KB Output is correct
9 Correct 101 ms 169488 KB Output is correct
10 Correct 103 ms 169468 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169340 KB Output is correct
2 Correct 105 ms 169456 KB Output is correct
3 Correct 104 ms 169440 KB Output is correct
4 Correct 113 ms 169484 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 104 ms 169464 KB Output is correct
7 Correct 106 ms 169488 KB Output is correct
8 Correct 111 ms 169464 KB Output is correct
9 Correct 101 ms 169488 KB Output is correct
10 Correct 103 ms 169468 KB Output is correct
11 Correct 119 ms 169720 KB Output is correct
12 Correct 112 ms 169848 KB Output is correct
13 Correct 120 ms 169720 KB Output is correct
14 Correct 123 ms 169720 KB Output is correct
15 Correct 117 ms 169720 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169340 KB Output is correct
2 Correct 105 ms 169456 KB Output is correct
3 Correct 104 ms 169440 KB Output is correct
4 Correct 113 ms 169484 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 104 ms 169464 KB Output is correct
7 Correct 106 ms 169488 KB Output is correct
8 Correct 111 ms 169464 KB Output is correct
9 Correct 101 ms 169488 KB Output is correct
10 Correct 103 ms 169468 KB Output is correct
11 Correct 119 ms 169720 KB Output is correct
12 Correct 112 ms 169848 KB Output is correct
13 Correct 120 ms 169720 KB Output is correct
14 Correct 123 ms 169720 KB Output is correct
15 Correct 117 ms 169720 KB Output is correct
16 Correct 373 ms 194296 KB Output is correct
17 Correct 387 ms 194400 KB Output is correct
18 Correct 376 ms 194296 KB Output is correct
19 Correct 359 ms 194168 KB Output is correct
20 Correct 357 ms 194300 KB Output is correct

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169340 KB Output is correct
2 Correct 105 ms 169456 KB Output is correct
3 Correct 104 ms 169440 KB Output is correct
4 Correct 113 ms 169484 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 104 ms 169464 KB Output is correct
7 Correct 106 ms 169488 KB Output is correct
8 Correct 111 ms 169464 KB Output is correct
9 Correct 101 ms 169488 KB Output is correct
10 Correct 103 ms 169468 KB Output is correct
11 Correct 119 ms 169720 KB Output is correct
12 Correct 112 ms 169848 KB Output is correct
13 Correct 120 ms 169720 KB Output is correct
14 Correct 123 ms 169720 KB Output is correct
15 Correct 117 ms 169720 KB Output is correct
16 Correct 373 ms 194296 KB Output is correct
17 Correct 387 ms 194400 KB Output is correct
18 Correct 376 ms 194296 KB Output is correct
19 Correct 359 ms 194168 KB Output is correct
20 Correct 357 ms 194300 KB Output is correct
21 Runtime error 312 ms 262144 KB Execution killed with signal 11 (could be triggered by violating memory limits)
22 Halted 0 ms 0 KB -