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Submission #484858

# Submission time Handle Problem Language Result Execution time Memory
484858 2021-11-05T16:06:59 Z nhanbin03 Watermelon (INOI20_watermelon) C++14
49 / 100
 84 ms 18048 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] <= 6);
    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 4 ms 5052 KB Output is correct
4 Incorrect 3 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 4 ms 5052 KB Output is correct
4 Incorrect 3 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 32 ms 10240 KB Output is correct
2 Correct 10 ms 5964 KB Output is correct
3 Correct 36 ms 10364 KB Output is correct
4 Correct 10 ms 6064 KB Output is correct
5 Correct 28 ms 10384 KB Output is correct
6 Correct 29 ms 10380 KB Output is correct
7 Correct 28 ms 10240 KB Output is correct
8 Correct 28 ms 10244 KB Output is correct
9 Correct 28 ms 10340 KB Output is correct
10 Correct 29 ms 10276 KB Output is correct
11 Correct 67 ms 15476 KB Output is correct
12 Correct 68 ms 15544 KB Output is correct
13 Correct 55 ms 15488 KB Output is correct
14 Correct 57 ms 15548 KB Output is correct
15 Correct 15 ms 7084 KB Output is correct
16 Correct 15 ms 6992 KB Output is correct
17 Correct 15 ms 6992 KB Output is correct
18 Correct 15 ms 7004 KB Output is correct
19 Correct 15 ms 6996 KB Output is correct
20 Correct 16 ms 6988 KB Output is correct
21 Correct 15 ms 6992 KB Output is correct
22 Correct 21 ms 7020 KB Output is correct
23 Correct 15 ms 6988 KB Output is correct
24 Correct 60 ms 15980 KB Output is correct
25 Correct 84 ms 16024 KB Output is correct
26 Correct 60 ms 16200 KB Output is correct
27 Correct 60 ms 15760 KB Output is correct
28 Correct 66 ms 15932 KB Output is correct
29 Correct 60 ms 15808 KB Output is correct
30 Correct 20 ms 8156 KB Output is correct
31 Correct 31 ms 10280 KB Output is correct
32 Correct 62 ms 14424 KB Output is correct
33 Correct 71 ms 15556 KB Output is correct
34 Correct 7 ms 6092 KB Output is correct
35 Correct 13 ms 7116 KB Output is correct
36 Correct 38 ms 10328 KB Output is correct
37 Correct 79 ms 15472 KB Output is correct
38 Correct 60 ms 15824 KB Output is correct
39 Correct 71 ms 15500 KB Output is correct
40 Correct 66 ms 16996 KB Output is correct
41 Correct 61 ms 18048 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 10240 KB Output is correct
2 Correct 10 ms 5964 KB Output is correct
3 Correct 36 ms 10364 KB Output is correct
4 Correct 10 ms 6064 KB Output is correct
5 Correct 28 ms 10384 KB Output is correct
6 Correct 29 ms 10380 KB Output is correct
7 Correct 28 ms 10240 KB Output is correct
8 Correct 28 ms 10244 KB Output is correct
9 Correct 28 ms 10340 KB Output is correct
10 Correct 29 ms 10276 KB Output is correct
11 Correct 67 ms 15476 KB Output is correct
12 Correct 68 ms 15544 KB Output is correct
13 Correct 55 ms 15488 KB Output is correct
14 Correct 57 ms 15548 KB Output is correct
15 Correct 15 ms 7084 KB Output is correct
16 Correct 15 ms 6992 KB Output is correct
17 Correct 15 ms 6992 KB Output is correct
18 Correct 15 ms 7004 KB Output is correct
19 Correct 15 ms 6996 KB Output is correct
20 Correct 16 ms 6988 KB Output is correct
21 Correct 15 ms 6992 KB Output is correct
22 Correct 21 ms 7020 KB Output is correct
23 Correct 15 ms 6988 KB Output is correct
24 Correct 60 ms 15980 KB Output is correct
25 Correct 84 ms 16024 KB Output is correct
26 Correct 60 ms 16200 KB Output is correct
27 Correct 60 ms 15760 KB Output is correct
28 Correct 66 ms 15932 KB Output is correct
29 Correct 60 ms 15808 KB Output is correct
30 Correct 20 ms 8156 KB Output is correct
31 Correct 31 ms 10280 KB Output is correct
32 Correct 62 ms 14424 KB Output is correct
33 Correct 71 ms 15556 KB Output is correct
34 Correct 7 ms 6092 KB Output is correct
35 Correct 13 ms 7116 KB Output is correct
36 Correct 38 ms 10328 KB Output is correct
37 Correct 79 ms 15472 KB Output is correct
38 Correct 60 ms 15824 KB Output is correct
39 Correct 71 ms 15500 KB Output is correct
40 Correct 66 ms 16996 KB Output is correct
41 Correct 61 ms 18048 KB Output is correct
42 Correct 29 ms 10256 KB Output is correct
43 Correct 8 ms 5964 KB Output is correct
44 Correct 29 ms 10348 KB Output is correct
45 Correct 9 ms 5964 KB Output is correct
46 Correct 9 ms 5972 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 10300 KB Output is correct
50 Correct 29 ms 10340 KB Output is correct
51 Correct 28 ms 10292 KB Output is correct
52 Correct 56 ms 15488 KB Output is correct
53 Correct 54 ms 15520 KB Output is correct
54 Correct 16 ms 7016 KB Output is correct
55 Correct 15 ms 7060 KB Output is correct
56 Correct 66 ms 14492 KB Output is correct
57 Correct 73 ms 15528 KB Output is correct
58 Correct 70 ms 15560 KB Output is correct
59 Correct 67 ms 15972 KB Output is correct
60 Correct 74 ms 15600 KB Output is correct
61 Correct 55 ms 16892 KB Output is correct
62 Correct 56 ms 17476 KB Output is correct
63 Correct 62 ms 15860 KB Output is correct
64 Correct 59 ms 16316 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 4 ms 5052 KB Output is correct
4 Incorrect 3 ms 4940 KB Output isn't correct
5 Halted 0 ms 0 KB -