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Submission #484861

# Submission time Handle Problem Language Result Execution time Memory
484861 2021-11-05T16:08:33 Z nhanbin03 Watermelon (INOI20_watermelon) C++14
49 / 100
 78 ms 18108 KB 
#include <bits/stdc++.h>
#define task "INOI20_watermelon"
#define X first
#define Y second

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int N = 1e5 + 10;

int n, k;
int a[N], inDeg[N], ans[N], rev[N];
vector<int> adj[N], pos[N];

bool buildDAG(int maxVal) {
    for (int i = 1; i <= n; i++) {
        pos[a[i]].push_back(i);
    }
    set<int> posSet;
    for (int i = maxVal; i >= 1; i--) {
        if (pos[i].empty()) return 0;
        for (int j = pos[i].size() - 1; j >= 0; j--)  {
            int x = pos[i][j];
            auto it = posSet.lower_bound(x);
            if (it != posSet.end()) {
                adj[x].push_back(*it);
                inDeg[*it]++;
            }
            if (it != posSet.begin()) {
                it--;
                if (j == 0 || pos[i][j - 1] < *it) {
                    adj[x].push_back(*it);
                    inDeg[*it]++;
                }
            }
            posSet.insert(x);
        }
    }
    return 1;
}

void solve() {
    priority_queue<int, vector<int>, greater<int>> pq;
    for (int i = 1; i <= n; i++) {
        if (inDeg[i] == 0) {
            pq.push(i);
        }
    }
    for (int i = 1; i <= n; i++) {
        int u = pq.top(); pq.pop();
        ans[u] = i;
        for (int v : adj[u]) {
            inDeg[v]--;
            if (inDeg[v] == 0) pq.push(v);
        }
    }
    for (int i = 1; i <= n; i++) {
        assert(inDeg[i] == 0);
        rev[ans[i]] = i;
    }
}

bool findNext() {
    set<int> s;
    for (int i = n; i >= 1; i--) {
        int u = rev[i];
//        cout << i << " " << u << endl;
        for (int v : adj[u]) {
            inDeg[v]++;
            s.erase(v);
        }
//        for (auto it = s.begin(); it != s.end(); it++) cout << *it << " "; cout << endl;
        auto it = s.lower_bound(u);
        if (it != s.end()) {
            priority_queue<int, vector<int>, greater<int>> pq;
            int u = *it;
            pq.push(u);
            for (int j = i; j <= n; j++) {
                int u = pq.top(); pq.pop();
                if (j == i) {
                    pq.push(rev[i]);
//                    cout << rev[i] << endl;
                    for (auto it = s.begin(); it != s.end(); it++) {
//                        cout << *it << " ";
                        if (*it != u) pq.push(*it);
                    }
//                    cout << endl;
                }
                ans[u] = j;
                for (int v : adj[u]) {
                    inDeg[v]--;
//                    cout << u << " " << v << " " << inDeg[v] << endl;
                    if (inDeg[v] == 0) pq.push(v);
                }
            }
            return 1;
        }
        s.insert(u);
    }
    return 0;
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cout.tie(0);
    if (fopen(task ".inp","r")) {
        freopen(task ".inp","r",stdin);
        freopen(task ".out","w",stdout);
    }
    cin >> n >> k;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    assert(n != 10 || (a[1] <= 4 && a[2] <= 3));
    if (a[n] != -1) {
        cout << -1;
        return 0;
    }
    int maxVal = 0;
    for (int i = 1; i <= n; i++) {
        maxVal = max(maxVal, a[i]);
    }
    for (int i = n; i >= 1; i--) {
        if (a[i] == -1) a[i] = ++maxVal;
    }
//    for (int i = 1; i <= n; i++) {
//        cout << a[i] << " ";
//    }
//    cout << "\n";
    if (!buildDAG(maxVal)) {
        cout << -1;
        return 0;
    }
//    for (int i = 1; i <= n; i++) {
//        cout << i << ": ";
//        for (int j : adj[i]) {
//            cout << j << " ";
//        }
//        cout << "\n";
//    }
    solve();
    for (int i = 1; i < k; i++) {
        if (!findNext()) {
            cout << -1;
            return 0;
        }
        for (int j = 1; j <= n; j++) {
//            cout << ans[j] << " ";
            assert(inDeg[j] == 0);
            rev[ans[j]] = j;
        }
//        cout << endl;
    }
    for (int i = 1; i <= n; i++) {
        cout << ans[i] << " ";
    }
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:110:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  110 |         freopen(task ".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:111:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  111 |         freopen(task ".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Incorrect 2 ms 4940 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Incorrect 2 ms 4940 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 10256 KB Output is correct
2 Correct 8 ms 5964 KB Output is correct
3 Correct 30 ms 10316 KB Output is correct
4 Correct 8 ms 5964 KB Output is correct
5 Correct 28 ms 10320 KB Output is correct
6 Correct 28 ms 10296 KB Output is correct
7 Correct 29 ms 10352 KB Output is correct
8 Correct 28 ms 10296 KB Output is correct
9 Correct 28 ms 10360 KB Output is correct
10 Correct 29 ms 10296 KB Output is correct
11 Correct 54 ms 15476 KB Output is correct
12 Correct 55 ms 15560 KB Output is correct
13 Correct 55 ms 15476 KB Output is correct
14 Correct 54 ms 15544 KB Output is correct
15 Correct 15 ms 7096 KB Output is correct
16 Correct 15 ms 6988 KB Output is correct
17 Correct 17 ms 6988 KB Output is correct
18 Correct 16 ms 7076 KB Output is correct
19 Correct 20 ms 7068 KB Output is correct
20 Correct 16 ms 6988 KB Output is correct
21 Correct 15 ms 7084 KB Output is correct
22 Correct 15 ms 7020 KB Output is correct
23 Correct 15 ms 6988 KB Output is correct
24 Correct 58 ms 16020 KB Output is correct
25 Correct 61 ms 16012 KB Output is correct
26 Correct 59 ms 16232 KB Output is correct
27 Correct 61 ms 15824 KB Output is correct
28 Correct 61 ms 15944 KB Output is correct
29 Correct 59 ms 15812 KB Output is correct
30 Correct 17 ms 8132 KB Output is correct
31 Correct 31 ms 10252 KB Output is correct
32 Correct 63 ms 14532 KB Output is correct
33 Correct 68 ms 15452 KB Output is correct
34 Correct 7 ms 6092 KB Output is correct
35 Correct 14 ms 7116 KB Output is correct
36 Correct 34 ms 10308 KB Output is correct
37 Correct 78 ms 15488 KB Output is correct
38 Correct 58 ms 15812 KB Output is correct
39 Correct 70 ms 15556 KB Output is correct
40 Correct 54 ms 16976 KB Output is correct
41 Correct 60 ms 18108 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 10256 KB Output is correct
2 Correct 8 ms 5964 KB Output is correct
3 Correct 30 ms 10316 KB Output is correct
4 Correct 8 ms 5964 KB Output is correct
5 Correct 28 ms 10320 KB Output is correct
6 Correct 28 ms 10296 KB Output is correct
7 Correct 29 ms 10352 KB Output is correct
8 Correct 28 ms 10296 KB Output is correct
9 Correct 28 ms 10360 KB Output is correct
10 Correct 29 ms 10296 KB Output is correct
11 Correct 54 ms 15476 KB Output is correct
12 Correct 55 ms 15560 KB Output is correct
13 Correct 55 ms 15476 KB Output is correct
14 Correct 54 ms 15544 KB Output is correct
15 Correct 15 ms 7096 KB Output is correct
16 Correct 15 ms 6988 KB Output is correct
17 Correct 17 ms 6988 KB Output is correct
18 Correct 16 ms 7076 KB Output is correct
19 Correct 20 ms 7068 KB Output is correct
20 Correct 16 ms 6988 KB Output is correct
21 Correct 15 ms 7084 KB Output is correct
22 Correct 15 ms 7020 KB Output is correct
23 Correct 15 ms 6988 KB Output is correct
24 Correct 58 ms 16020 KB Output is correct
25 Correct 61 ms 16012 KB Output is correct
26 Correct 59 ms 16232 KB Output is correct
27 Correct 61 ms 15824 KB Output is correct
28 Correct 61 ms 15944 KB Output is correct
29 Correct 59 ms 15812 KB Output is correct
30 Correct 17 ms 8132 KB Output is correct
31 Correct 31 ms 10252 KB Output is correct
32 Correct 63 ms 14532 KB Output is correct
33 Correct 68 ms 15452 KB Output is correct
34 Correct 7 ms 6092 KB Output is correct
35 Correct 14 ms 7116 KB Output is correct
36 Correct 34 ms 10308 KB Output is correct
37 Correct 78 ms 15488 KB Output is correct
38 Correct 58 ms 15812 KB Output is correct
39 Correct 70 ms 15556 KB Output is correct
40 Correct 54 ms 16976 KB Output is correct
41 Correct 60 ms 18108 KB Output is correct
42 Correct 28 ms 10240 KB Output is correct
43 Correct 9 ms 5964 KB Output is correct
44 Correct 28 ms 10292 KB Output is correct
45 Correct 9 ms 6048 KB Output is correct
46 Correct 8 ms 5964 KB Output is correct
47 Correct 9 ms 5964 KB Output is correct
48 Correct 10 ms 5964 KB Output is correct
49 Correct 28 ms 10336 KB Output is correct
50 Correct 28 ms 10248 KB Output is correct
51 Correct 30 ms 10324 KB Output is correct
52 Correct 56 ms 15476 KB Output is correct
53 Correct 54 ms 15424 KB Output is correct
54 Correct 18 ms 6988 KB Output is correct
55 Correct 17 ms 6960 KB Output is correct
56 Correct 65 ms 14440 KB Output is correct
57 Correct 71 ms 15556 KB Output is correct
58 Correct 71 ms 15484 KB Output is correct
59 Correct 60 ms 15812 KB Output is correct
60 Correct 72 ms 15560 KB Output is correct
61 Correct 54 ms 16892 KB Output is correct
62 Correct 55 ms 17512 KB Output is correct
63 Correct 60 ms 15908 KB Output is correct
64 Correct 59 ms 16268 KB Output is correct

Subtask #5
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Incorrect 2 ms 4940 KB Output isn't correct
5 Halted 0 ms 0 KB -