oj.uz

Submission #484816

# Submission time Handle Problem Language Result Execution time Memory
484816 2021-11-05T14:43:05 Z nhanbin03 Watermelon (INOI20_watermelon) C++14
49 / 100
 82 ms 17988 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) {
        assert(0);
        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 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 2 ms 4940 KB Output is correct
2 Correct 3 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 10284 KB Output is correct
2 Correct 9 ms 5964 KB Output is correct
3 Correct 33 ms 10452 KB Output is correct
4 Correct 8 ms 5964 KB Output is correct
5 Correct 28 ms 10276 KB Output is correct
6 Correct 28 ms 10372 KB Output is correct
7 Correct 28 ms 10256 KB Output is correct
8 Correct 28 ms 10384 KB Output is correct
9 Correct 27 ms 10368 KB Output is correct
10 Correct 31 ms 10240 KB Output is correct
11 Correct 57 ms 15500 KB Output is correct
12 Correct 57 ms 15592 KB Output is correct
13 Correct 55 ms 15460 KB Output is correct
14 Correct 53 ms 15516 KB Output is correct
15 Correct 15 ms 7028 KB Output is correct
16 Correct 14 ms 7056 KB Output is correct
17 Correct 15 ms 7048 KB Output is correct
18 Correct 15 ms 7076 KB Output is correct
19 Correct 15 ms 7092 KB Output is correct
20 Correct 16 ms 7072 KB Output is correct
21 Correct 15 ms 6988 KB Output is correct
22 Correct 15 ms 6988 KB Output is correct
23 Correct 22 ms 7076 KB Output is correct
24 Correct 80 ms 16008 KB Output is correct
25 Correct 63 ms 16100 KB Output is correct
26 Correct 58 ms 16268 KB Output is correct
27 Correct 60 ms 15812 KB Output is correct
28 Correct 59 ms 15944 KB Output is correct
29 Correct 61 ms 15792 KB Output is correct
30 Correct 21 ms 8140 KB Output is correct
31 Correct 35 ms 10296 KB Output is correct
32 Correct 70 ms 14456 KB Output is correct
33 Correct 71 ms 15656 KB Output is correct
34 Correct 7 ms 6092 KB Output is correct
35 Correct 13 ms 7120 KB Output is correct
36 Correct 32 ms 10308 KB Output is correct
37 Correct 71 ms 15556 KB Output is correct
38 Correct 61 ms 15824 KB Output is correct
39 Correct 72 ms 15508 KB Output is correct
40 Correct 52 ms 16996 KB Output is correct
41 Correct 61 ms 17988 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 10284 KB Output is correct
2 Correct 9 ms 5964 KB Output is correct
3 Correct 33 ms 10452 KB Output is correct
4 Correct 8 ms 5964 KB Output is correct
5 Correct 28 ms 10276 KB Output is correct
6 Correct 28 ms 10372 KB Output is correct
7 Correct 28 ms 10256 KB Output is correct
8 Correct 28 ms 10384 KB Output is correct
9 Correct 27 ms 10368 KB Output is correct
10 Correct 31 ms 10240 KB Output is correct
11 Correct 57 ms 15500 KB Output is correct
12 Correct 57 ms 15592 KB Output is correct
13 Correct 55 ms 15460 KB Output is correct
14 Correct 53 ms 15516 KB Output is correct
15 Correct 15 ms 7028 KB Output is correct
16 Correct 14 ms 7056 KB Output is correct
17 Correct 15 ms 7048 KB Output is correct
18 Correct 15 ms 7076 KB Output is correct
19 Correct 15 ms 7092 KB Output is correct
20 Correct 16 ms 7072 KB Output is correct
21 Correct 15 ms 6988 KB Output is correct
22 Correct 15 ms 6988 KB Output is correct
23 Correct 22 ms 7076 KB Output is correct
24 Correct 80 ms 16008 KB Output is correct
25 Correct 63 ms 16100 KB Output is correct
26 Correct 58 ms 16268 KB Output is correct
27 Correct 60 ms 15812 KB Output is correct
28 Correct 59 ms 15944 KB Output is correct
29 Correct 61 ms 15792 KB Output is correct
30 Correct 21 ms 8140 KB Output is correct
31 Correct 35 ms 10296 KB Output is correct
32 Correct 70 ms 14456 KB Output is correct
33 Correct 71 ms 15656 KB Output is correct
34 Correct 7 ms 6092 KB Output is correct
35 Correct 13 ms 7120 KB Output is correct
36 Correct 32 ms 10308 KB Output is correct
37 Correct 71 ms 15556 KB Output is correct
38 Correct 61 ms 15824 KB Output is correct
39 Correct 72 ms 15508 KB Output is correct
40 Correct 52 ms 16996 KB Output is correct
41 Correct 61 ms 17988 KB Output is correct
42 Correct 35 ms 10272 KB Output is correct
43 Correct 10 ms 5964 KB Output is correct
44 Correct 28 ms 10240 KB Output is correct
45 Correct 11 ms 5964 KB Output is correct
46 Correct 9 ms 5964 KB Output is correct
47 Correct 8 ms 5964 KB Output is correct
48 Correct 9 ms 6060 KB Output is correct
49 Correct 29 ms 10312 KB Output is correct
50 Correct 29 ms 10276 KB Output is correct
51 Correct 28 ms 10332 KB Output is correct
52 Correct 74 ms 15440 KB Output is correct
53 Correct 60 ms 15424 KB Output is correct
54 Correct 14 ms 6968 KB Output is correct
55 Correct 15 ms 7000 KB Output is correct
56 Correct 63 ms 14424 KB Output is correct
57 Correct 81 ms 15600 KB Output is correct
58 Correct 75 ms 15556 KB Output is correct
59 Correct 62 ms 15780 KB Output is correct
60 Correct 82 ms 15592 KB Output is correct
61 Correct 65 ms 16900 KB Output is correct
62 Correct 60 ms 17416 KB Output is correct
63 Correct 62 ms 15864 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 2 ms 4940 KB Output is correct
2 Correct 3 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 -