oj.uz

Submission #245601

# Submission time Handle Problem Language Result Execution time Memory
245601 2020-07-07T00:21:29 Z thecodingwizard Swap (BOI16_swap) C++11
68 / 100
 741 ms 262148 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 200000;

int n, A[maxn+10];
vector<int> memo[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;
    }
}

vector<int> &dp(int u, int par) {
    if (memo[u][par].size() > 0) return memo[u][par];
    int idx = u, p = par;
    while (p >= 2) {
        p -= 2;
        idx /= 2;
    }
    if (p == 1) idx *= 2;
    int cur = A[idx];
    int l = u*2, r = u*2+1;
    if (l > n && r > n) {
        memo[u][par].push_back(cur);
        return memo[u][par];
    } else if (r > n) {
        if (A[l] < cur) {
            memo[u][par].push_back(A[l]);
            memo[u][par].push_back(cur);
        } else {
            memo[u][par].push_back(cur);
            memo[u][par].push_back(A[l]);
        }
        return memo[u][par];
    }

    int L = A[l], R = A[r];
    // no swap
    if (cur < L && cur < R) {
        merge(memo[u][par], cur, dp(l, 0), dp(r, 0));
        return memo[u][par];
    }

    // swap left
    if (cur > L && L < R) {
        merge(memo[u][par], L, dp(l, par+2), dp(r, 0));
        return memo[u][par];
    }

    if (R < cur && R < L) {
        // swap right
        merge(memo[u][par], R, dp(l, 0), dp(r, par+2));
        vector<int> tmp;
        // swap both
        merge(tmp, R, dp(l, par+2), dp(r, 3));
        if (tmp < memo[u][par]) {
            memo[u][par] = tmp;
        }

        return memo[u][par];
    }

    assert(false);
}

int main() {
    cin.tie(0); ios_base::sync_with_stdio(0);
    cin >> n; for (int i = 1; i <= n; i++) cin >> A[i];
    vector<int> ans = dp(1, 0);
    for (int v : ans) 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 100 ms 169464 KB Output is correct
2 Correct 103 ms 169592 KB Output is correct
3 Correct 99 ms 169464 KB Output is correct
4 Correct 103 ms 169464 KB Output is correct
5 Correct 117 ms 169464 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 169464 KB Output is correct
2 Correct 103 ms 169592 KB Output is correct
3 Correct 99 ms 169464 KB Output is correct
4 Correct 103 ms 169464 KB Output is correct
5 Correct 117 ms 169464 KB Output is correct
6 Correct 114 ms 169464 KB Output is correct
7 Correct 105 ms 169464 KB Output is correct
8 Correct 112 ms 169464 KB Output is correct
9 Correct 113 ms 169464 KB Output is correct
10 Correct 103 ms 169560 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 169464 KB Output is correct
2 Correct 103 ms 169592 KB Output is correct
3 Correct 99 ms 169464 KB Output is correct
4 Correct 103 ms 169464 KB Output is correct
5 Correct 117 ms 169464 KB Output is correct
6 Correct 114 ms 169464 KB Output is correct
7 Correct 105 ms 169464 KB Output is correct
8 Correct 112 ms 169464 KB Output is correct
9 Correct 113 ms 169464 KB Output is correct
10 Correct 103 ms 169560 KB Output is correct
11 Correct 100 ms 169592 KB Output is correct
12 Correct 103 ms 169596 KB Output is correct
13 Correct 104 ms 169592 KB Output is correct
14 Correct 106 ms 169848 KB Output is correct
15 Correct 118 ms 169848 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 169464 KB Output is correct
2 Correct 103 ms 169592 KB Output is correct
3 Correct 99 ms 169464 KB Output is correct
4 Correct 103 ms 169464 KB Output is correct
5 Correct 117 ms 169464 KB Output is correct
6 Correct 114 ms 169464 KB Output is correct
7 Correct 105 ms 169464 KB Output is correct
8 Correct 112 ms 169464 KB Output is correct
9 Correct 113 ms 169464 KB Output is correct
10 Correct 103 ms 169560 KB Output is correct
11 Correct 100 ms 169592 KB Output is correct
12 Correct 103 ms 169596 KB Output is correct
13 Correct 104 ms 169592 KB Output is correct
14 Correct 106 ms 169848 KB Output is correct
15 Correct 118 ms 169848 KB Output is correct
16 Correct 160 ms 178612 KB Output is correct
17 Correct 187 ms 178292 KB Output is correct
18 Correct 185 ms 178868 KB Output is correct
19 Correct 433 ms 209648 KB Output is correct
20 Correct 467 ms 209392 KB Output is correct

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 169464 KB Output is correct
2 Correct 103 ms 169592 KB Output is correct
3 Correct 99 ms 169464 KB Output is correct
4 Correct 103 ms 169464 KB Output is correct
5 Correct 117 ms 169464 KB Output is correct
6 Correct 114 ms 169464 KB Output is correct
7 Correct 105 ms 169464 KB Output is correct
8 Correct 112 ms 169464 KB Output is correct
9 Correct 113 ms 169464 KB Output is correct
10 Correct 103 ms 169560 KB Output is correct
11 Correct 100 ms 169592 KB Output is correct
12 Correct 103 ms 169596 KB Output is correct
13 Correct 104 ms 169592 KB Output is correct
14 Correct 106 ms 169848 KB Output is correct
15 Correct 118 ms 169848 KB Output is correct
16 Correct 160 ms 178612 KB Output is correct
17 Correct 187 ms 178292 KB Output is correct
18 Correct 185 ms 178868 KB Output is correct
19 Correct 433 ms 209648 KB Output is correct
20 Correct 467 ms 209392 KB Output is correct
21 Correct 349 ms 209536 KB Output is correct
22 Correct 352 ms 210308 KB Output is correct
23 Correct 345 ms 210560 KB Output is correct
24 Runtime error 741 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
25 Halted 0 ms 0 KB -