oj.uz

Submission #245622

# Submission time Handle Problem Language Result Execution time Memory
245622 2020-07-07T01:39:53 Z thecodingwizard Swap (BOI16_swap) C++11
68 / 100
 1000 ms 256864 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;
bool v[maxn+10][40];
 
void merge(vector<int> &res, int root, vector<int> &L, vector<int> &R) {
    res.push_back(root);
    for (int len = 1, i = 0, j = 0; i < L.size() || j < R.size(); i += len, j += len, len *= 2) {
        for (int k = 0; k < len && i+k<L.size(); k++) res.push_back(L[i+k]);
        for (int k = 0; k < len && i+k<R.size(); k++) res.push_back(R[i+k]);
    }
}
 
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 = 1; i <= n; i++) for (int j = 0; j < 36; j++) v[i][j] = false;
    v[1][0] = 1;
    for (int i = 1; 2*i+1 <= n; i++) {
        for (int j = 0; j < 36; j++) {
            if (!v[i][j]) continue;
            int idx = i>>(j/2);
            if (j&1) idx *= 2;
            int cur = A[idx];
 
            v[2*i][0] = v[2*i+1][0] = true;
 
            if (A[i<<1]<A[idx]&&A[i<<1]<A[i<<1^1]) {
                v[2*i][j+2] = true;
            }
            if (A[i<<1^1]<cur&&A[i<<1^1]<A[i<<1]) {
                v[2*i+1][3] = true;
                v[2*i][j+2] = true;
                v[2*i+1][j+2] = true;
            }
        }
    }
    for (int i = n; i; i--) {
        int l = i*2, r = i*2+1;
        for (int j = 0; j < 36; j++) {
            if (!v[i][j]) continue;
            int idx = i>>(j/2);
            if (j&1) idx *= 2;
            int cur = A[idx];
 
            if (l > n && r > n) {
                dp[i][j] = {cur};
                continue;
            } else if (r > n) {
                dp[i][j] = {min(A[l],cur),max(A[l],cur)};
                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++) if (v[l][j]) vector<int>().swap(dp[l][j]);
        }
        if (r <= n) {
            for (int j = 0; j < 36; j++) if (v[r][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:13:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int len = 1, i = 0, j = 0; i < L.size() || j < R.size(); i += len, j += len, len *= 2) {
                                     ~~^~~~~~~~~~
swap.cpp:13:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int len = 1, i = 0, j = 0; i < L.size() || j < R.size(); i += len, j += len, len *= 2) {
                                                     ~~^~~~~~~~~~
swap.cpp:14:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int k = 0; k < len && i+k<L.size(); k++) res.push_back(L[i+k]);
                                    ~~~^~~~~~~~~
swap.cpp:15:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int k = 0; k < len && i+k<R.size(); k++) res.push_back(R[i+k]);
                                    ~~~^~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169464 KB Output is correct
2 Correct 100 ms 169464 KB Output is correct
3 Correct 122 ms 169480 KB Output is correct
4 Correct 117 ms 169400 KB Output is correct
5 Correct 100 ms 169464 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169464 KB Output is correct
2 Correct 100 ms 169464 KB Output is correct
3 Correct 122 ms 169480 KB Output is correct
4 Correct 117 ms 169400 KB Output is correct
5 Correct 100 ms 169464 KB Output is correct
6 Correct 99 ms 169464 KB Output is correct
7 Correct 110 ms 169592 KB Output is correct
8 Correct 101 ms 169464 KB Output is correct
9 Correct 102 ms 169464 KB Output is correct
10 Correct 104 ms 169464 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169464 KB Output is correct
2 Correct 100 ms 169464 KB Output is correct
3 Correct 122 ms 169480 KB Output is correct
4 Correct 117 ms 169400 KB Output is correct
5 Correct 100 ms 169464 KB Output is correct
6 Correct 99 ms 169464 KB Output is correct
7 Correct 110 ms 169592 KB Output is correct
8 Correct 101 ms 169464 KB Output is correct
9 Correct 102 ms 169464 KB Output is correct
10 Correct 104 ms 169464 KB Output is correct
11 Correct 105 ms 169592 KB Output is correct
12 Correct 101 ms 169592 KB Output is correct
13 Correct 114 ms 169596 KB Output is correct
14 Correct 111 ms 169728 KB Output is correct
15 Correct 100 ms 169720 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169464 KB Output is correct
2 Correct 100 ms 169464 KB Output is correct
3 Correct 122 ms 169480 KB Output is correct
4 Correct 117 ms 169400 KB Output is correct
5 Correct 100 ms 169464 KB Output is correct
6 Correct 99 ms 169464 KB Output is correct
7 Correct 110 ms 169592 KB Output is correct
8 Correct 101 ms 169464 KB Output is correct
9 Correct 102 ms 169464 KB Output is correct
10 Correct 104 ms 169464 KB Output is correct
11 Correct 105 ms 169592 KB Output is correct
12 Correct 101 ms 169592 KB Output is correct
13 Correct 114 ms 169596 KB Output is correct
14 Correct 111 ms 169728 KB Output is correct
15 Correct 100 ms 169720 KB Output is correct
16 Correct 176 ms 174072 KB Output is correct
17 Correct 159 ms 174072 KB Output is correct
18 Correct 158 ms 174076 KB Output is correct
19 Correct 302 ms 189064 KB Output is correct
20 Correct 280 ms 188948 KB Output is correct

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 169464 KB Output is correct
2 Correct 100 ms 169464 KB Output is correct
3 Correct 122 ms 169480 KB Output is correct
4 Correct 117 ms 169400 KB Output is correct
5 Correct 100 ms 169464 KB Output is correct
6 Correct 99 ms 169464 KB Output is correct
7 Correct 110 ms 169592 KB Output is correct
8 Correct 101 ms 169464 KB Output is correct
9 Correct 102 ms 169464 KB Output is correct
10 Correct 104 ms 169464 KB Output is correct
11 Correct 105 ms 169592 KB Output is correct
12 Correct 101 ms 169592 KB Output is correct
13 Correct 114 ms 169596 KB Output is correct
14 Correct 111 ms 169728 KB Output is correct
15 Correct 100 ms 169720 KB Output is correct
16 Correct 176 ms 174072 KB Output is correct
17 Correct 159 ms 174072 KB Output is correct
18 Correct 158 ms 174076 KB Output is correct
19 Correct 302 ms 189064 KB Output is correct
20 Correct 280 ms 188948 KB Output is correct
21 Correct 361 ms 187896 KB Output is correct
22 Correct 343 ms 187768 KB Output is correct
23 Correct 354 ms 188760 KB Output is correct
24 Execution timed out 1031 ms 256864 KB Time limit exceeded
25 Halted 0 ms 0 KB -