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Submission #1046549

# Submission time Handle Problem Language Result Execution time Memory
1046549 2024-08-06T16:32:09 Z Andrey Marshmallow Molecules (CCO19_day2problem2) C++14
25 / 25
 62 ms 19084 KB 
#include<bits/stdc++.h>
using namespace std;

vector<int> dsu(100001);
vector<int> haha[100001];
vector<int> bruh[100001];
set<int> idk[100001];

int calc(int a) {
    int c = a;
    while(dsu[c] != c) {
        c = dsu[c];
    }
    int e = a;
    while(dsu[e] != e) {
        int d = dsu[e];
        dsu[e] = c;
        e = d;
    }
    return c;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n,m,a,b;
    cin >> n >> m;
    for(int i = 1; i <= n; i++) {
        dsu[i] = i;
    }
    long long ans = 0;
    for(int i = 0; i < m; i++) {
        cin >> a >> b;
        haha[a].push_back(b);
        bruh[b].push_back(a);
    }
    for(int i = 1; i <= n; i++) {
        vector<int> wut(0);
        int big = -1,p = -1;
        for(int v: bruh[i]) {
            int x = calc(v);
            wut.push_back(x);
            if((int)idk[x].size() > big) {
                big = idk[x].size();
                p = x;
            }
        }
        if(p > -1) {
            swap(idk[i],idk[p]);
            dsu[p] = i;
            sort(wut.begin(),wut.end());
            for(int j = 0; j < wut.size(); j++) {
                if(j == 0 || wut[j] != wut[j-1]) {
                    int c = wut[j];
                    if(c == p) {
                        continue;
                    }
                    dsu[c] = i;
                    while(!idk[c].empty()) {
                        int x = *idk[c].lower_bound(-INT_MAX);
                        idk[i].insert(x);
                        idk[c].erase(x);
                    }
                }
            }
        }
        for(int v: haha[i]) {
            idk[i].insert(v);
        }
        idk[i].erase(i);
        ans+=idk[i].size();
    }
    cout << ans;
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:54:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |             for(int j = 0; j < wut.size(); j++) {
      |                            ~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10076 KB Output is correct
2 Correct 2 ms 10076 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 2 ms 10076 KB Output is correct
5 Correct 2 ms 10076 KB Output is correct
6 Correct 2 ms 10076 KB Output is correct
7 Correct 2 ms 10076 KB Output is correct
8 Correct 2 ms 10076 KB Output is correct
9 Correct 1 ms 10076 KB Output is correct
10 Correct 2 ms 10072 KB Output is correct
11 Correct 2 ms 10076 KB Output is correct
12 Correct 2 ms 10076 KB Output is correct
13 Correct 2 ms 10076 KB Output is correct
14 Correct 2 ms 10076 KB Output is correct
15 Correct 1 ms 10076 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10076 KB Output is correct
2 Correct 2 ms 10076 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 2 ms 10076 KB Output is correct
5 Correct 2 ms 10076 KB Output is correct
6 Correct 2 ms 10076 KB Output is correct
7 Correct 2 ms 10076 KB Output is correct
8 Correct 2 ms 10076 KB Output is correct
9 Correct 1 ms 10076 KB Output is correct
10 Correct 2 ms 10072 KB Output is correct
11 Correct 2 ms 10076 KB Output is correct
12 Correct 2 ms 10076 KB Output is correct
13 Correct 2 ms 10076 KB Output is correct
14 Correct 2 ms 10076 KB Output is correct
15 Correct 1 ms 10076 KB Output is correct
16 Correct 23 ms 12636 KB Output is correct
17 Correct 22 ms 12636 KB Output is correct
18 Correct 20 ms 12572 KB Output is correct
19 Correct 21 ms 12636 KB Output is correct
20 Correct 20 ms 12528 KB Output is correct
21 Correct 4 ms 10584 KB Output is correct
22 Correct 22 ms 12636 KB Output is correct
23 Correct 21 ms 12672 KB Output is correct
24 Correct 21 ms 12636 KB Output is correct
25 Correct 22 ms 12632 KB Output is correct
26 Correct 21 ms 12636 KB Output is correct
27 Correct 3 ms 10588 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 17536 KB Output is correct
2 Correct 49 ms 17756 KB Output is correct
3 Correct 57 ms 17232 KB Output is correct
4 Correct 49 ms 18980 KB Output is correct
5 Correct 50 ms 17660 KB Output is correct
6 Correct 45 ms 17236 KB Output is correct
7 Correct 47 ms 18512 KB Output is correct
8 Correct 50 ms 17748 KB Output is correct
9 Correct 50 ms 17236 KB Output is correct
10 Correct 48 ms 18772 KB Output is correct
11 Correct 50 ms 17752 KB Output is correct
12 Correct 46 ms 17260 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 10076 KB Output is correct
2 Correct 2 ms 10076 KB Output is correct
3 Correct 2 ms 10332 KB Output is correct
4 Correct 2 ms 10076 KB Output is correct
5 Correct 2 ms 10076 KB Output is correct
6 Correct 2 ms 10076 KB Output is correct
7 Correct 2 ms 10076 KB Output is correct
8 Correct 2 ms 10076 KB Output is correct
9 Correct 1 ms 10076 KB Output is correct
10 Correct 2 ms 10072 KB Output is correct
11 Correct 2 ms 10076 KB Output is correct
12 Correct 2 ms 10076 KB Output is correct
13 Correct 2 ms 10076 KB Output is correct
14 Correct 2 ms 10076 KB Output is correct
15 Correct 1 ms 10076 KB Output is correct
16 Correct 23 ms 12636 KB Output is correct
17 Correct 22 ms 12636 KB Output is correct
18 Correct 20 ms 12572 KB Output is correct
19 Correct 21 ms 12636 KB Output is correct
20 Correct 20 ms 12528 KB Output is correct
21 Correct 4 ms 10584 KB Output is correct
22 Correct 22 ms 12636 KB Output is correct
23 Correct 21 ms 12672 KB Output is correct
24 Correct 21 ms 12636 KB Output is correct
25 Correct 22 ms 12632 KB Output is correct
26 Correct 21 ms 12636 KB Output is correct
27 Correct 3 ms 10588 KB Output is correct
28 Correct 55 ms 17536 KB Output is correct
29 Correct 49 ms 17756 KB Output is correct
30 Correct 57 ms 17232 KB Output is correct
31 Correct 49 ms 18980 KB Output is correct
32 Correct 50 ms 17660 KB Output is correct
33 Correct 45 ms 17236 KB Output is correct
34 Correct 47 ms 18512 KB Output is correct
35 Correct 50 ms 17748 KB Output is correct
36 Correct 50 ms 17236 KB Output is correct
37 Correct 48 ms 18772 KB Output is correct
38 Correct 50 ms 17752 KB Output is correct
39 Correct 46 ms 17260 KB Output is correct
40 Correct 53 ms 16260 KB Output is correct
41 Correct 46 ms 16340 KB Output is correct
42 Correct 55 ms 16472 KB Output is correct
43 Correct 54 ms 16428 KB Output is correct
44 Correct 51 ms 17240 KB Output is correct
45 Correct 45 ms 17244 KB Output is correct
46 Correct 42 ms 18008 KB Output is correct
47 Correct 47 ms 18012 KB Output is correct
48 Correct 38 ms 18768 KB Output is correct
49 Correct 39 ms 18852 KB Output is correct
50 Correct 47 ms 18524 KB Output is correct
51 Correct 62 ms 17632 KB Output is correct
52 Correct 46 ms 17244 KB Output is correct
53 Correct 43 ms 17244 KB Output is correct
54 Correct 50 ms 16984 KB Output is correct
55 Correct 52 ms 17936 KB Output is correct
56 Correct 44 ms 18048 KB Output is correct
57 Correct 39 ms 19084 KB Output is correct