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Submission #484859

# Submission time Handle Problem Language Result Execution time Memory
484859 2021-11-05T16:07:23 Z nhanbin03 Watermelon (INOI20_watermelon) C++14
49 / 100
 91 ms 17980 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);
    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 3 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 2 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 3 ms 4940 KB Output is correct
2 Correct 2 ms 4940 KB Output is correct
3 Correct 2 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 28 ms 10316 KB Output is correct
2 Correct 9 ms 5964 KB Output is correct
3 Correct 28 ms 10348 KB Output is correct
4 Correct 8 ms 5964 KB Output is correct
5 Correct 31 ms 10364 KB Output is correct
6 Correct 29 ms 10376 KB Output is correct
7 Correct 29 ms 10292 KB Output is correct
8 Correct 29 ms 10248 KB Output is correct
9 Correct 28 ms 10320 KB Output is correct
10 Correct 28 ms 10380 KB Output is correct
11 Correct 54 ms 15512 KB Output is correct
12 Correct 61 ms 15432 KB Output is correct
13 Correct 73 ms 15420 KB Output is correct
14 Correct 55 ms 15492 KB Output is correct
15 Correct 15 ms 7012 KB Output is correct
16 Correct 15 ms 6988 KB Output is correct
17 Correct 17 ms 7052 KB Output is correct
18 Correct 14 ms 6988 KB Output is correct
19 Correct 15 ms 7092 KB Output is correct
20 Correct 15 ms 7020 KB Output is correct
21 Correct 15 ms 7084 KB Output is correct
22 Correct 15 ms 7072 KB Output is correct
23 Correct 17 ms 7060 KB Output is correct
24 Correct 61 ms 16012 KB Output is correct
25 Correct 74 ms 16068 KB Output is correct
26 Correct 61 ms 16164 KB Output is correct
27 Correct 59 ms 15812 KB Output is correct
28 Correct 58 ms 15940 KB Output is correct
29 Correct 60 ms 15812 KB Output is correct
30 Correct 22 ms 8268 KB Output is correct
31 Correct 31 ms 10208 KB Output is correct
32 Correct 91 ms 14504 KB Output is correct
33 Correct 69 ms 15508 KB Output is correct
34 Correct 8 ms 6092 KB Output is correct
35 Correct 19 ms 7152 KB Output is correct
36 Correct 32 ms 10228 KB Output is correct
37 Correct 75 ms 15556 KB Output is correct
38 Correct 61 ms 15760 KB Output is correct
39 Correct 73 ms 15556 KB Output is correct
40 Correct 51 ms 17008 KB Output is correct
41 Correct 60 ms 17980 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 10316 KB Output is correct
2 Correct 9 ms 5964 KB Output is correct
3 Correct 28 ms 10348 KB Output is correct
4 Correct 8 ms 5964 KB Output is correct
5 Correct 31 ms 10364 KB Output is correct
6 Correct 29 ms 10376 KB Output is correct
7 Correct 29 ms 10292 KB Output is correct
8 Correct 29 ms 10248 KB Output is correct
9 Correct 28 ms 10320 KB Output is correct
10 Correct 28 ms 10380 KB Output is correct
11 Correct 54 ms 15512 KB Output is correct
12 Correct 61 ms 15432 KB Output is correct
13 Correct 73 ms 15420 KB Output is correct
14 Correct 55 ms 15492 KB Output is correct
15 Correct 15 ms 7012 KB Output is correct
16 Correct 15 ms 6988 KB Output is correct
17 Correct 17 ms 7052 KB Output is correct
18 Correct 14 ms 6988 KB Output is correct
19 Correct 15 ms 7092 KB Output is correct
20 Correct 15 ms 7020 KB Output is correct
21 Correct 15 ms 7084 KB Output is correct
22 Correct 15 ms 7072 KB Output is correct
23 Correct 17 ms 7060 KB Output is correct
24 Correct 61 ms 16012 KB Output is correct
25 Correct 74 ms 16068 KB Output is correct
26 Correct 61 ms 16164 KB Output is correct
27 Correct 59 ms 15812 KB Output is correct
28 Correct 58 ms 15940 KB Output is correct
29 Correct 60 ms 15812 KB Output is correct
30 Correct 22 ms 8268 KB Output is correct
31 Correct 31 ms 10208 KB Output is correct
32 Correct 91 ms 14504 KB Output is correct
33 Correct 69 ms 15508 KB Output is correct
34 Correct 8 ms 6092 KB Output is correct
35 Correct 19 ms 7152 KB Output is correct
36 Correct 32 ms 10228 KB Output is correct
37 Correct 75 ms 15556 KB Output is correct
38 Correct 61 ms 15760 KB Output is correct
39 Correct 73 ms 15556 KB Output is correct
40 Correct 51 ms 17008 KB Output is correct
41 Correct 60 ms 17980 KB Output is correct
42 Correct 27 ms 10312 KB Output is correct
43 Correct 11 ms 5964 KB Output is correct
44 Correct 30 ms 10324 KB Output is correct
45 Correct 8 ms 6044 KB Output is correct
46 Correct 8 ms 6032 KB Output is correct
47 Correct 8 ms 6072 KB Output is correct
48 Correct 10 ms 5964 KB Output is correct
49 Correct 29 ms 10312 KB Output is correct
50 Correct 30 ms 10324 KB Output is correct
51 Correct 36 ms 10372 KB Output is correct
52 Correct 55 ms 15524 KB Output is correct
53 Correct 54 ms 15424 KB Output is correct
54 Correct 18 ms 7088 KB Output is correct
55 Correct 16 ms 7084 KB Output is correct
56 Correct 64 ms 14480 KB Output is correct
57 Correct 73 ms 15480 KB Output is correct
58 Correct 72 ms 15556 KB Output is correct
59 Correct 60 ms 15712 KB Output is correct
60 Correct 78 ms 15612 KB Output is correct
61 Correct 61 ms 16944 KB Output is correct
62 Correct 55 ms 17476 KB Output is correct
63 Correct 61 ms 15888 KB Output is correct
64 Correct 58 ms 16232 KB Output is correct

Subtask #5
0 / 19.0

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