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Submission #484804

# Submission time Handle Problem Language Result Execution time Memory
484804 2021-11-05T14:24:11 Z nhanbin03 Watermelon (INOI20_watermelon) C++14
49 / 100
 76 ms 18372 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];
    }
    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 3 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 3 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 29 ms 10372 KB Output is correct
2 Correct 8 ms 6220 KB Output is correct
3 Correct 28 ms 10368 KB Output is correct
4 Correct 10 ms 6220 KB Output is correct
5 Correct 31 ms 10436 KB Output is correct
6 Correct 28 ms 10504 KB Output is correct
7 Correct 28 ms 10360 KB Output is correct
8 Correct 29 ms 10400 KB Output is correct
9 Correct 28 ms 10368 KB Output is correct
10 Correct 28 ms 10436 KB Output is correct
11 Correct 54 ms 15732 KB Output is correct
12 Correct 58 ms 15732 KB Output is correct
13 Correct 53 ms 15672 KB Output is correct
14 Correct 55 ms 15676 KB Output is correct
15 Correct 15 ms 7244 KB Output is correct
16 Correct 15 ms 7244 KB Output is correct
17 Correct 16 ms 7328 KB Output is correct
18 Correct 15 ms 7352 KB Output is correct
19 Correct 17 ms 7244 KB Output is correct
20 Correct 15 ms 7244 KB Output is correct
21 Correct 19 ms 7304 KB Output is correct
22 Correct 16 ms 7372 KB Output is correct
23 Correct 16 ms 7328 KB Output is correct
24 Correct 59 ms 16336 KB Output is correct
25 Correct 59 ms 16324 KB Output is correct
26 Correct 59 ms 16452 KB Output is correct
27 Correct 61 ms 16128 KB Output is correct
28 Correct 61 ms 16196 KB Output is correct
29 Correct 60 ms 16060 KB Output is correct
30 Correct 19 ms 8260 KB Output is correct
31 Correct 32 ms 10436 KB Output is correct
32 Correct 61 ms 14788 KB Output is correct
33 Correct 76 ms 15740 KB Output is correct
34 Correct 7 ms 6176 KB Output is correct
35 Correct 13 ms 7116 KB Output is correct
36 Correct 34 ms 10564 KB Output is correct
37 Correct 73 ms 15812 KB Output is correct
38 Correct 60 ms 15976 KB Output is correct
39 Correct 73 ms 15812 KB Output is correct
40 Correct 52 ms 17240 KB Output is correct
41 Correct 60 ms 18372 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 10372 KB Output is correct
2 Correct 8 ms 6220 KB Output is correct
3 Correct 28 ms 10368 KB Output is correct
4 Correct 10 ms 6220 KB Output is correct
5 Correct 31 ms 10436 KB Output is correct
6 Correct 28 ms 10504 KB Output is correct
7 Correct 28 ms 10360 KB Output is correct
8 Correct 29 ms 10400 KB Output is correct
9 Correct 28 ms 10368 KB Output is correct
10 Correct 28 ms 10436 KB Output is correct
11 Correct 54 ms 15732 KB Output is correct
12 Correct 58 ms 15732 KB Output is correct
13 Correct 53 ms 15672 KB Output is correct
14 Correct 55 ms 15676 KB Output is correct
15 Correct 15 ms 7244 KB Output is correct
16 Correct 15 ms 7244 KB Output is correct
17 Correct 16 ms 7328 KB Output is correct
18 Correct 15 ms 7352 KB Output is correct
19 Correct 17 ms 7244 KB Output is correct
20 Correct 15 ms 7244 KB Output is correct
21 Correct 19 ms 7304 KB Output is correct
22 Correct 16 ms 7372 KB Output is correct
23 Correct 16 ms 7328 KB Output is correct
24 Correct 59 ms 16336 KB Output is correct
25 Correct 59 ms 16324 KB Output is correct
26 Correct 59 ms 16452 KB Output is correct
27 Correct 61 ms 16128 KB Output is correct
28 Correct 61 ms 16196 KB Output is correct
29 Correct 60 ms 16060 KB Output is correct
30 Correct 19 ms 8260 KB Output is correct
31 Correct 32 ms 10436 KB Output is correct
32 Correct 61 ms 14788 KB Output is correct
33 Correct 76 ms 15740 KB Output is correct
34 Correct 7 ms 6176 KB Output is correct
35 Correct 13 ms 7116 KB Output is correct
36 Correct 34 ms 10564 KB Output is correct
37 Correct 73 ms 15812 KB Output is correct
38 Correct 60 ms 15976 KB Output is correct
39 Correct 73 ms 15812 KB Output is correct
40 Correct 52 ms 17240 KB Output is correct
41 Correct 60 ms 18372 KB Output is correct
42 Correct 28 ms 10364 KB Output is correct
43 Correct 8 ms 6220 KB Output is correct
44 Correct 28 ms 10476 KB Output is correct
45 Correct 9 ms 6220 KB Output is correct
46 Correct 9 ms 6228 KB Output is correct
47 Correct 12 ms 6220 KB Output is correct
48 Correct 9 ms 6220 KB Output is correct
49 Correct 28 ms 10408 KB Output is correct
50 Correct 28 ms 10468 KB Output is correct
51 Correct 28 ms 10376 KB Output is correct
52 Correct 55 ms 15720 KB Output is correct
53 Correct 57 ms 15660 KB Output is correct
54 Correct 18 ms 7632 KB Output is correct
55 Correct 16 ms 7500 KB Output is correct
56 Correct 63 ms 14820 KB Output is correct
57 Correct 72 ms 15784 KB Output is correct
58 Correct 74 ms 15812 KB Output is correct
59 Correct 67 ms 16028 KB Output is correct
60 Correct 72 ms 15928 KB Output is correct
61 Correct 55 ms 17228 KB Output is correct
62 Correct 55 ms 17988 KB Output is correct
63 Correct 62 ms 16440 KB Output is correct
64 Correct 58 ms 16764 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 3 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 -