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답안 #245603

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
245603 2020-07-07T00:34:46 Z thecodingwizard Swap (BOI16_swap) C++11
68 / 100
 685 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];

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) {
                // swap right
                merge(dp[i][j], R, dp[l][0], dp[r][j+2]);
                vector<int> tmp;
                // swap both
                merge(tmp, R, dp[l][j+2], dp[r][3]);
                if (tmp < dp[i][j]) {
                    dp[i][j] = tmp;
                }
            }
        }

        if (l <= n) {
            for (int j = 0; j < 36; j++) dp[l][j].clear();
        }
        if (r <= n) {
            for (int j = 0; j < 36; j++) dp[r][j].clear();
        }
    }
    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

# 결과 실행 시간 메모리 Grader output
1 Correct 102 ms 169464 KB Output is correct
2 Correct 115 ms 169464 KB Output is correct
3 Correct 107 ms 169464 KB Output is correct
4 Correct 108 ms 169544 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 102 ms 169464 KB Output is correct
2 Correct 115 ms 169464 KB Output is correct
3 Correct 107 ms 169464 KB Output is correct
4 Correct 108 ms 169544 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 103 ms 169464 KB Output is correct
7 Correct 101 ms 169464 KB Output is correct
8 Correct 109 ms 169464 KB Output is correct
9 Correct 113 ms 169464 KB Output is correct
10 Correct 115 ms 169464 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 102 ms 169464 KB Output is correct
2 Correct 115 ms 169464 KB Output is correct
3 Correct 107 ms 169464 KB Output is correct
4 Correct 108 ms 169544 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 103 ms 169464 KB Output is correct
7 Correct 101 ms 169464 KB Output is correct
8 Correct 109 ms 169464 KB Output is correct
9 Correct 113 ms 169464 KB Output is correct
10 Correct 115 ms 169464 KB Output is correct
11 Correct 120 ms 170232 KB Output is correct
12 Correct 118 ms 170360 KB Output is correct
13 Correct 108 ms 170232 KB Output is correct
14 Correct 105 ms 170232 KB Output is correct
15 Correct 122 ms 170232 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 102 ms 169464 KB Output is correct
2 Correct 115 ms 169464 KB Output is correct
3 Correct 107 ms 169464 KB Output is correct
4 Correct 108 ms 169544 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 103 ms 169464 KB Output is correct
7 Correct 101 ms 169464 KB Output is correct
8 Correct 109 ms 169464 KB Output is correct
9 Correct 113 ms 169464 KB Output is correct
10 Correct 115 ms 169464 KB Output is correct
11 Correct 120 ms 170232 KB Output is correct
12 Correct 118 ms 170360 KB Output is correct
13 Correct 108 ms 170232 KB Output is correct
14 Correct 105 ms 170232 KB Output is correct
15 Correct 122 ms 170232 KB Output is correct
16 Correct 486 ms 249008 KB Output is correct
17 Correct 474 ms 249140 KB Output is correct
18 Correct 506 ms 249152 KB Output is correct
19 Correct 685 ms 250992 KB Output is correct
20 Correct 602 ms 250996 KB Output is correct

Subtask #5
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 102 ms 169464 KB Output is correct
2 Correct 115 ms 169464 KB Output is correct
3 Correct 107 ms 169464 KB Output is correct
4 Correct 108 ms 169544 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 103 ms 169464 KB Output is correct
7 Correct 101 ms 169464 KB Output is correct
8 Correct 109 ms 169464 KB Output is correct
9 Correct 113 ms 169464 KB Output is correct
10 Correct 115 ms 169464 KB Output is correct
11 Correct 120 ms 170232 KB Output is correct
12 Correct 118 ms 170360 KB Output is correct
13 Correct 108 ms 170232 KB Output is correct
14 Correct 105 ms 170232 KB Output is correct
15 Correct 122 ms 170232 KB Output is correct
16 Correct 486 ms 249008 KB Output is correct
17 Correct 474 ms 249140 KB Output is correct
18 Correct 506 ms 249152 KB Output is correct
19 Correct 685 ms 250992 KB Output is correct
20 Correct 602 ms 250996 KB Output is correct
21 Runtime error 345 ms 262144 KB Execution killed with signal 11 (could be triggered by violating memory limits)
22 Halted 0 ms 0 KB -