oj.uz

Submission #245624

# Submission time Handle Problem Language Result Execution time Memory
245624 2020-07-07T01:41:56 Z thecodingwizard Swap (BOI16_swap) C++11
68 / 100
 1000 ms 258112 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[i<<1][0] = v[i<<1^1][0] = true;
 
            if (A[i<<1]<A[idx]&&A[i<<1]<A[i<<1^1]) {
                v[i<<1][j+2] = true;
            } else if (A[i<<1^1]<cur&&A[i<<1^1]<A[i<<1]) {
                v[i<<1^1][3] = v[i<<1][j+2] = v[i<<1^1][j+2] = true;
            }
        }
    }
    for (int i = n; i; i--) {
        int l = i<<1, r = i<<1^1;
        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};
            } else if (r > n) {
                dp[i][j] = {min(A[l],cur),max(A[l],cur)};
            } else {
                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]);
                }
     
                // swap left
                else if (cur > L && L < R) {
                    merge(dp[i][j], L, dp[l][j+2], dp[r][0]);
                }
     
                else 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 << " ";
    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 105 ms 169464 KB Output is correct
2 Correct 103 ms 169464 KB Output is correct
3 Correct 103 ms 169464 KB Output is correct
4 Correct 104 ms 169464 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 105 ms 169464 KB Output is correct
2 Correct 103 ms 169464 KB Output is correct
3 Correct 103 ms 169464 KB Output is correct
4 Correct 104 ms 169464 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 106 ms 169464 KB Output is correct
7 Correct 110 ms 169440 KB Output is correct
8 Correct 128 ms 169464 KB Output is correct
9 Correct 110 ms 169468 KB Output is correct
10 Correct 102 ms 169464 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 169464 KB Output is correct
2 Correct 103 ms 169464 KB Output is correct
3 Correct 103 ms 169464 KB Output is correct
4 Correct 104 ms 169464 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 106 ms 169464 KB Output is correct
7 Correct 110 ms 169440 KB Output is correct
8 Correct 128 ms 169464 KB Output is correct
9 Correct 110 ms 169468 KB Output is correct
10 Correct 102 ms 169464 KB Output is correct
11 Correct 108 ms 169592 KB Output is correct
12 Correct 104 ms 169592 KB Output is correct
13 Correct 108 ms 169592 KB Output is correct
14 Correct 121 ms 169720 KB Output is correct
15 Correct 106 ms 169720 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 169464 KB Output is correct
2 Correct 103 ms 169464 KB Output is correct
3 Correct 103 ms 169464 KB Output is correct
4 Correct 104 ms 169464 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 106 ms 169464 KB Output is correct
7 Correct 110 ms 169440 KB Output is correct
8 Correct 128 ms 169464 KB Output is correct
9 Correct 110 ms 169468 KB Output is correct
10 Correct 102 ms 169464 KB Output is correct
11 Correct 108 ms 169592 KB Output is correct
12 Correct 104 ms 169592 KB Output is correct
13 Correct 108 ms 169592 KB Output is correct
14 Correct 121 ms 169720 KB Output is correct
15 Correct 106 ms 169720 KB Output is correct
16 Correct 189 ms 174304 KB Output is correct
17 Correct 158 ms 174328 KB Output is correct
18 Correct 168 ms 174504 KB Output is correct
19 Correct 328 ms 189304 KB Output is correct
20 Correct 311 ms 189048 KB Output is correct

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 169464 KB Output is correct
2 Correct 103 ms 169464 KB Output is correct
3 Correct 103 ms 169464 KB Output is correct
4 Correct 104 ms 169464 KB Output is correct
5 Correct 104 ms 169464 KB Output is correct
6 Correct 106 ms 169464 KB Output is correct
7 Correct 110 ms 169440 KB Output is correct
8 Correct 128 ms 169464 KB Output is correct
9 Correct 110 ms 169468 KB Output is correct
10 Correct 102 ms 169464 KB Output is correct
11 Correct 108 ms 169592 KB Output is correct
12 Correct 104 ms 169592 KB Output is correct
13 Correct 108 ms 169592 KB Output is correct
14 Correct 121 ms 169720 KB Output is correct
15 Correct 106 ms 169720 KB Output is correct
16 Correct 189 ms 174304 KB Output is correct
17 Correct 158 ms 174328 KB Output is correct
18 Correct 168 ms 174504 KB Output is correct
19 Correct 328 ms 189304 KB Output is correct
20 Correct 311 ms 189048 KB Output is correct
21 Correct 471 ms 189096 KB Output is correct
22 Correct 358 ms 189052 KB Output is correct
23 Correct 355 ms 189880 KB Output is correct
24 Correct 997 ms 258112 KB Output is correct
25 Execution timed out 1079 ms 258040 KB Time limit exceeded