oj.uz

Submission #484814

# Submission time Handle Problem Language Result Execution time Memory
484814 2021-11-05T14:37:24 Z nhanbin03 Watermelon (INOI20_watermelon) C++14
49 / 100
 80 ms 18056 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;
    assert(k <= 2);
    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 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 29 ms 10376 KB Output is correct
2 Correct 8 ms 5964 KB Output is correct
3 Correct 27 ms 10284 KB Output is correct
4 Correct 10 ms 6068 KB Output is correct
5 Correct 28 ms 10376 KB Output is correct
6 Correct 28 ms 10372 KB Output is correct
7 Correct 28 ms 10368 KB Output is correct
8 Correct 27 ms 10268 KB Output is correct
9 Correct 29 ms 10364 KB Output is correct
10 Correct 28 ms 10344 KB Output is correct
11 Correct 56 ms 15428 KB Output is correct
12 Correct 56 ms 15492 KB Output is correct
13 Correct 56 ms 15420 KB Output is correct
14 Correct 60 ms 15468 KB Output is correct
15 Correct 15 ms 6988 KB Output is correct
16 Correct 16 ms 7072 KB Output is correct
17 Correct 15 ms 6988 KB Output is correct
18 Correct 16 ms 7024 KB Output is correct
19 Correct 15 ms 7008 KB Output is correct
20 Correct 15 ms 6988 KB Output is correct
21 Correct 15 ms 7044 KB Output is correct
22 Correct 15 ms 7004 KB Output is correct
23 Correct 15 ms 6988 KB Output is correct
24 Correct 61 ms 15992 KB Output is correct
25 Correct 61 ms 16096 KB Output is correct
26 Correct 63 ms 16268 KB Output is correct
27 Correct 60 ms 15812 KB Output is correct
28 Correct 60 ms 15952 KB Output is correct
29 Correct 60 ms 15812 KB Output is correct
30 Correct 20 ms 8140 KB Output is correct
31 Correct 36 ms 10308 KB Output is correct
32 Correct 69 ms 14424 KB Output is correct
33 Correct 72 ms 15552 KB Output is correct
34 Correct 7 ms 6092 KB Output is correct
35 Correct 13 ms 7096 KB Output is correct
36 Correct 32 ms 10280 KB Output is correct
37 Correct 73 ms 15480 KB Output is correct
38 Correct 60 ms 15760 KB Output is correct
39 Correct 75 ms 15532 KB Output is correct
40 Correct 53 ms 16920 KB Output is correct
41 Correct 59 ms 18056 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 10376 KB Output is correct
2 Correct 8 ms 5964 KB Output is correct
3 Correct 27 ms 10284 KB Output is correct
4 Correct 10 ms 6068 KB Output is correct
5 Correct 28 ms 10376 KB Output is correct
6 Correct 28 ms 10372 KB Output is correct
7 Correct 28 ms 10368 KB Output is correct
8 Correct 27 ms 10268 KB Output is correct
9 Correct 29 ms 10364 KB Output is correct
10 Correct 28 ms 10344 KB Output is correct
11 Correct 56 ms 15428 KB Output is correct
12 Correct 56 ms 15492 KB Output is correct
13 Correct 56 ms 15420 KB Output is correct
14 Correct 60 ms 15468 KB Output is correct
15 Correct 15 ms 6988 KB Output is correct
16 Correct 16 ms 7072 KB Output is correct
17 Correct 15 ms 6988 KB Output is correct
18 Correct 16 ms 7024 KB Output is correct
19 Correct 15 ms 7008 KB Output is correct
20 Correct 15 ms 6988 KB Output is correct
21 Correct 15 ms 7044 KB Output is correct
22 Correct 15 ms 7004 KB Output is correct
23 Correct 15 ms 6988 KB Output is correct
24 Correct 61 ms 15992 KB Output is correct
25 Correct 61 ms 16096 KB Output is correct
26 Correct 63 ms 16268 KB Output is correct
27 Correct 60 ms 15812 KB Output is correct
28 Correct 60 ms 15952 KB Output is correct
29 Correct 60 ms 15812 KB Output is correct
30 Correct 20 ms 8140 KB Output is correct
31 Correct 36 ms 10308 KB Output is correct
32 Correct 69 ms 14424 KB Output is correct
33 Correct 72 ms 15552 KB Output is correct
34 Correct 7 ms 6092 KB Output is correct
35 Correct 13 ms 7096 KB Output is correct
36 Correct 32 ms 10280 KB Output is correct
37 Correct 73 ms 15480 KB Output is correct
38 Correct 60 ms 15760 KB Output is correct
39 Correct 75 ms 15532 KB Output is correct
40 Correct 53 ms 16920 KB Output is correct
41 Correct 59 ms 18056 KB Output is correct
42 Correct 27 ms 10244 KB Output is correct
43 Correct 10 ms 5944 KB Output is correct
44 Correct 29 ms 10376 KB Output is correct
45 Correct 8 ms 5964 KB Output is correct
46 Correct 9 ms 5964 KB Output is correct
47 Correct 9 ms 5964 KB Output is correct
48 Correct 8 ms 5964 KB Output is correct
49 Correct 31 ms 10376 KB Output is correct
50 Correct 31 ms 10384 KB Output is correct
51 Correct 32 ms 10240 KB Output is correct
52 Correct 55 ms 15504 KB Output is correct
53 Correct 55 ms 15444 KB Output is correct
54 Correct 16 ms 6972 KB Output is correct
55 Correct 16 ms 6992 KB Output is correct
56 Correct 80 ms 14472 KB Output is correct
57 Correct 77 ms 15536 KB Output is correct
58 Correct 72 ms 15540 KB Output is correct
59 Correct 61 ms 15796 KB Output is correct
60 Correct 72 ms 15532 KB Output is correct
61 Correct 55 ms 16888 KB Output is correct
62 Correct 59 ms 17488 KB Output is correct
63 Correct 65 ms 15824 KB Output is correct
64 Correct 59 ms 16324 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 -