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답안 #422565

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
422565 2021-06-10T08:40:37 Z Hideo 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++17
17 / 100
 5000 ms 50424 KB 
#include <bits/stdc++.h>
using namespace std;

#define all(s) s.begin(), s.end()
#define ll long long
#define fr first
#define sc second
#define pb push_back
#define mk make_pair
#define pi pair < int, int >

const int N = 3e5 + 7;
const int INF = 1e9 + 7;

ll sum;
ll p[N];
int n, m;

set < int > g[N], q[N];

int findp (int x){
    if (p[x] < 0)
        return x;
    return p[x] = findp(p[x]);
}

bool check (int v, int u){
    v = findp(v);
    u = findp(u);
    if (v != u){
        for (auto to : g[u])
            if (findp(to) == v)
                return true;
    }
    return false;
}

void unite (int v, int u){
    v = findp(v);
    u = findp(u);
    if (v != u){
        sum -= 1ll * int(g[u].size()) * -p[u];
        sum -= 1ll * int(g[v].size()) * -p[v];
        if (g[u].size() > g[v].size())
            swap(v, u);
        for (auto to : g[u]){
            g[v].insert(to);
        }
        g[v].insert(u);
        g[v].erase(v);
        p[v] += p[u];
        p[u] = v;
        sum += 1ll * int(g[v].size()) * -p[v];
//        cout << v << ' ' << u << endl;
        for (auto to : g[v]){
            if (check(v, to)){
                unite(v, to);
            }
        }
    }
}

main (){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    memset(p, -1, sizeof(p));
    cin >> n >> m;
    for (int i = 1; i <= m; i++){
        int a, b;
        cin >> a >> b;
//        if (q[findp(b)].find(findp(a)) != q.end())
        if (check(b, a))
            unite(a, b);
        else {
            b = findp(b);
            sum -= 1ll * int(g[b].size()) * -p[b];
            g[b].insert(a);
            g[b].erase(b);
//            a = findp(a);
//            q[a].insert(b);
            sum += 1ll * int(g[b].size()) * -p[b];
        }
        cout << sum << endl;
    }
}

Compilation message

joitter2.cpp:63:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   63 | main (){
      | ^~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 30796 KB Output is correct
2 Correct 16 ms 30796 KB Output is correct
3 Correct 16 ms 30744 KB Output is correct
4 Correct 16 ms 30796 KB Output is correct
5 Correct 17 ms 30796 KB Output is correct
6 Correct 17 ms 30796 KB Output is correct
7 Correct 21 ms 30776 KB Output is correct
8 Correct 21 ms 30796 KB Output is correct
9 Correct 22 ms 30856 KB Output is correct
10 Correct 17 ms 30796 KB Output is correct
11 Correct 17 ms 30780 KB Output is correct
12 Correct 17 ms 30836 KB Output is correct
13 Correct 17 ms 30808 KB Output is correct
14 Correct 17 ms 30776 KB Output is correct
15 Correct 17 ms 30796 KB Output is correct
16 Correct 18 ms 30844 KB Output is correct
17 Correct 18 ms 30796 KB Output is correct
18 Correct 17 ms 30756 KB Output is correct
19 Correct 17 ms 30796 KB Output is correct
20 Correct 22 ms 30756 KB Output is correct
21 Correct 22 ms 30816 KB Output is correct
22 Correct 18 ms 30808 KB Output is correct
23 Correct 19 ms 30852 KB Output is correct
24 Correct 17 ms 30836 KB Output is correct
25 Correct 23 ms 30856 KB Output is correct
26 Correct 18 ms 30788 KB Output is correct
27 Correct 18 ms 30808 KB Output is correct
28 Correct 19 ms 30796 KB Output is correct
29 Correct 18 ms 30840 KB Output is correct
30 Correct 17 ms 30796 KB Output is correct
31 Correct 24 ms 30852 KB Output is correct
32 Correct 18 ms 30796 KB Output is correct
33 Correct 21 ms 30796 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 30796 KB Output is correct
2 Correct 16 ms 30796 KB Output is correct
3 Correct 16 ms 30744 KB Output is correct
4 Correct 16 ms 30796 KB Output is correct
5 Correct 17 ms 30796 KB Output is correct
6 Correct 17 ms 30796 KB Output is correct
7 Correct 21 ms 30776 KB Output is correct
8 Correct 21 ms 30796 KB Output is correct
9 Correct 22 ms 30856 KB Output is correct
10 Correct 17 ms 30796 KB Output is correct
11 Correct 17 ms 30780 KB Output is correct
12 Correct 17 ms 30836 KB Output is correct
13 Correct 17 ms 30808 KB Output is correct
14 Correct 17 ms 30776 KB Output is correct
15 Correct 17 ms 30796 KB Output is correct
16 Correct 18 ms 30844 KB Output is correct
17 Correct 18 ms 30796 KB Output is correct
18 Correct 17 ms 30756 KB Output is correct
19 Correct 17 ms 30796 KB Output is correct
20 Correct 22 ms 30756 KB Output is correct
21 Correct 22 ms 30816 KB Output is correct
22 Correct 18 ms 30808 KB Output is correct
23 Correct 19 ms 30852 KB Output is correct
24 Correct 17 ms 30836 KB Output is correct
25 Correct 23 ms 30856 KB Output is correct
26 Correct 18 ms 30788 KB Output is correct
27 Correct 18 ms 30808 KB Output is correct
28 Correct 19 ms 30796 KB Output is correct
29 Correct 18 ms 30840 KB Output is correct
30 Correct 17 ms 30796 KB Output is correct
31 Correct 24 ms 30852 KB Output is correct
32 Correct 18 ms 30796 KB Output is correct
33 Correct 21 ms 30796 KB Output is correct
34 Correct 35 ms 30956 KB Output is correct
35 Correct 632 ms 35920 KB Output is correct
36 Correct 728 ms 37244 KB Output is correct
37 Correct 742 ms 37300 KB Output is correct
38 Correct 693 ms 37132 KB Output is correct
39 Correct 103 ms 30972 KB Output is correct
40 Correct 30 ms 31316 KB Output is correct
41 Correct 27 ms 31188 KB Output is correct
42 Correct 113 ms 31080 KB Output is correct
43 Correct 96 ms 30960 KB Output is correct
44 Correct 95 ms 30968 KB Output is correct
45 Correct 95 ms 31080 KB Output is correct
46 Correct 98 ms 31040 KB Output is correct
47 Correct 36 ms 31100 KB Output is correct
48 Correct 36 ms 31180 KB Output is correct
49 Correct 80 ms 31448 KB Output is correct
50 Correct 728 ms 37192 KB Output is correct
51 Correct 117 ms 31172 KB Output is correct
52 Correct 745 ms 36684 KB Output is correct
53 Correct 106 ms 31444 KB Output is correct
54 Correct 704 ms 36932 KB Output is correct
55 Correct 94 ms 31300 KB Output is correct
56 Correct 95 ms 31300 KB Output is correct
57 Correct 94 ms 31300 KB Output is correct
58 Correct 91 ms 31360 KB Output is correct
59 Correct 27 ms 31324 KB Output is correct
60 Correct 706 ms 36260 KB Output is correct
61 Correct 54 ms 31052 KB Output is correct
62 Correct 768 ms 37104 KB Output is correct

Subtask #3
0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 30796 KB Output is correct
2 Correct 16 ms 30796 KB Output is correct
3 Correct 16 ms 30744 KB Output is correct
4 Correct 16 ms 30796 KB Output is correct
5 Correct 17 ms 30796 KB Output is correct
6 Correct 17 ms 30796 KB Output is correct
7 Correct 21 ms 30776 KB Output is correct
8 Correct 21 ms 30796 KB Output is correct
9 Correct 22 ms 30856 KB Output is correct
10 Correct 17 ms 30796 KB Output is correct
11 Correct 17 ms 30780 KB Output is correct
12 Correct 17 ms 30836 KB Output is correct
13 Correct 17 ms 30808 KB Output is correct
14 Correct 17 ms 30776 KB Output is correct
15 Correct 17 ms 30796 KB Output is correct
16 Correct 18 ms 30844 KB Output is correct
17 Correct 18 ms 30796 KB Output is correct
18 Correct 17 ms 30756 KB Output is correct
19 Correct 17 ms 30796 KB Output is correct
20 Correct 22 ms 30756 KB Output is correct
21 Correct 22 ms 30816 KB Output is correct
22 Correct 18 ms 30808 KB Output is correct
23 Correct 19 ms 30852 KB Output is correct
24 Correct 17 ms 30836 KB Output is correct
25 Correct 23 ms 30856 KB Output is correct
26 Correct 18 ms 30788 KB Output is correct
27 Correct 18 ms 30808 KB Output is correct
28 Correct 19 ms 30796 KB Output is correct
29 Correct 18 ms 30840 KB Output is correct
30 Correct 17 ms 30796 KB Output is correct
31 Correct 24 ms 30852 KB Output is correct
32 Correct 18 ms 30796 KB Output is correct
33 Correct 21 ms 30796 KB Output is correct
34 Correct 35 ms 30956 KB Output is correct
35 Correct 632 ms 35920 KB Output is correct
36 Correct 728 ms 37244 KB Output is correct
37 Correct 742 ms 37300 KB Output is correct
38 Correct 693 ms 37132 KB Output is correct
39 Correct 103 ms 30972 KB Output is correct
40 Correct 30 ms 31316 KB Output is correct
41 Correct 27 ms 31188 KB Output is correct
42 Correct 113 ms 31080 KB Output is correct
43 Correct 96 ms 30960 KB Output is correct
44 Correct 95 ms 30968 KB Output is correct
45 Correct 95 ms 31080 KB Output is correct
46 Correct 98 ms 31040 KB Output is correct
47 Correct 36 ms 31100 KB Output is correct
48 Correct 36 ms 31180 KB Output is correct
49 Correct 80 ms 31448 KB Output is correct
50 Correct 728 ms 37192 KB Output is correct
51 Correct 117 ms 31172 KB Output is correct
52 Correct 745 ms 36684 KB Output is correct
53 Correct 106 ms 31444 KB Output is correct
54 Correct 704 ms 36932 KB Output is correct
55 Correct 94 ms 31300 KB Output is correct
56 Correct 95 ms 31300 KB Output is correct
57 Correct 94 ms 31300 KB Output is correct
58 Correct 91 ms 31360 KB Output is correct
59 Correct 27 ms 31324 KB Output is correct
60 Correct 706 ms 36260 KB Output is correct
61 Correct 54 ms 31052 KB Output is correct
62 Correct 768 ms 37104 KB Output is correct
63 Correct 853 ms 50296 KB Output is correct
64 Correct 771 ms 50272 KB Output is correct
65 Correct 761 ms 50424 KB Output is correct
66 Execution timed out 5053 ms 32808 KB Time limit exceeded
67 Halted 0 ms 0 KB -