oj.uz

Submission #958356

# Submission time Handle Problem Language Result Execution time Memory
958356 2024-04-05T14:11:45 Z MisterReaper Making Friends on Joitter is Fun (JOI20_joitter2) C++17
100 / 100
 901 ms 70736 KB 
#include <bits/stdc++.h>
using i64 = long long;

constexpr int maxN = 1E5 + 5;

std::set<int> in[maxN], rev[maxN], graph[maxN];
std::queue<std::pair<int, int>> strong;
i64 ans = 0;
int par[maxN], sz[maxN];

int find(int a) {
    if(par[a] == a) {
        return a;
    }
    return par[a] = find(par[a]);
}

void connect(int a, int b) {
    graph[a].emplace(b);
    rev[b].emplace(a);
    if(graph[b].count(a)) {
        strong.emplace(a, b);
    }
}

void unite(int a, int b) {
    a = find(a), b = find(b);
    if(a == b) {
        return;
    }

    if(sz[a] < sz[b]) {
        std::swap(a, b);
    }

    ans += 1LL * in[b].size() * sz[a] + 1LL * in[a].size() * sz[b];

    sz[a] += sz[b];
    par[b] = a;

    for(int v : in[b]) {
        if(!in[a].count(v)) {
            in[a].emplace(v);
        } else {
            ans -= sz[a];
        }
    }

    graph[a].erase(b);
    graph[b].erase(a);
    rev[a].erase(b);
    rev[b].erase(a);
    for(int v : graph[b]) {
        rev[v].erase(b);
        connect(a, v);
    }
    for(int v : rev[b]) {
        graph[v].erase(b);
        connect(v, a);
    }
}

void solve() {
    int n, m;
    std::cin >> n >> m;

    for(int _ = 1; _ <= m; _++) {
        int a, b;
        std::cin >> a >> b;

        if(find(a) != find(b) && !in[find(b)].count(a)) {
            in[find(b)].emplace(a);
            ans += sz[find(b)];
            connect(find(a), find(b));
            while(!strong.empty()) {
                auto [u, v] = strong.front();
                strong.pop();
                unite(u, v);
            }
        }

        std::cout << ans << "\n";
    }
    
    return;
}

signed main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    std::iota(par, par + maxN, 0);
    std::fill(sz, sz + maxN, 1);
    for(int i = 0; i < maxN; i++) {
        in[i].emplace(i);
    }

    int t = 1; //std::cin >> t;
    for(int i = 1; i <= t; i++) {
        solve();
    }

    return 0;
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 19800 KB Output is correct
2 Correct 10 ms 20060 KB Output is correct
3 Correct 9 ms 19800 KB Output is correct
4 Correct 9 ms 19804 KB Output is correct
5 Correct 10 ms 19804 KB Output is correct
6 Correct 8 ms 19804 KB Output is correct
7 Correct 9 ms 20060 KB Output is correct
8 Correct 9 ms 20060 KB Output is correct
9 Correct 9 ms 20056 KB Output is correct
10 Correct 8 ms 19804 KB Output is correct
11 Correct 8 ms 19804 KB Output is correct
12 Correct 10 ms 19804 KB Output is correct
13 Correct 9 ms 19804 KB Output is correct
14 Correct 8 ms 19800 KB Output is correct
15 Correct 11 ms 19800 KB Output is correct
16 Correct 9 ms 19804 KB Output is correct
17 Correct 8 ms 19800 KB Output is correct
18 Correct 8 ms 19808 KB Output is correct
19 Correct 8 ms 19864 KB Output is correct
20 Correct 8 ms 19800 KB Output is correct
21 Correct 9 ms 20064 KB Output is correct
22 Correct 8 ms 19804 KB Output is correct
23 Correct 8 ms 20064 KB Output is correct
24 Correct 8 ms 19804 KB Output is correct
25 Correct 9 ms 20056 KB Output is correct
26 Correct 8 ms 19804 KB Output is correct
27 Correct 9 ms 20032 KB Output is correct
28 Correct 9 ms 19812 KB Output is correct
29 Correct 10 ms 20060 KB Output is correct
30 Correct 8 ms 19804 KB Output is correct
31 Correct 8 ms 19932 KB Output is correct
32 Correct 8 ms 19800 KB Output is correct
33 Correct 9 ms 20060 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 19800 KB Output is correct
2 Correct 10 ms 20060 KB Output is correct
3 Correct 9 ms 19800 KB Output is correct
4 Correct 9 ms 19804 KB Output is correct
5 Correct 10 ms 19804 KB Output is correct
6 Correct 8 ms 19804 KB Output is correct
7 Correct 9 ms 20060 KB Output is correct
8 Correct 9 ms 20060 KB Output is correct
9 Correct 9 ms 20056 KB Output is correct
10 Correct 8 ms 19804 KB Output is correct
11 Correct 8 ms 19804 KB Output is correct
12 Correct 10 ms 19804 KB Output is correct
13 Correct 9 ms 19804 KB Output is correct
14 Correct 8 ms 19800 KB Output is correct
15 Correct 11 ms 19800 KB Output is correct
16 Correct 9 ms 19804 KB Output is correct
17 Correct 8 ms 19800 KB Output is correct
18 Correct 8 ms 19808 KB Output is correct
19 Correct 8 ms 19864 KB Output is correct
20 Correct 8 ms 19800 KB Output is correct
21 Correct 9 ms 20064 KB Output is correct
22 Correct 8 ms 19804 KB Output is correct
23 Correct 8 ms 20064 KB Output is correct
24 Correct 8 ms 19804 KB Output is correct
25 Correct 9 ms 20056 KB Output is correct
26 Correct 8 ms 19804 KB Output is correct
27 Correct 9 ms 20032 KB Output is correct
28 Correct 9 ms 19812 KB Output is correct
29 Correct 10 ms 20060 KB Output is correct
30 Correct 8 ms 19804 KB Output is correct
31 Correct 8 ms 19932 KB Output is correct
32 Correct 8 ms 19800 KB Output is correct
33 Correct 9 ms 20060 KB Output is correct
34 Correct 10 ms 20060 KB Output is correct
35 Correct 63 ms 25668 KB Output is correct
36 Correct 83 ms 28336 KB Output is correct
37 Correct 82 ms 28500 KB Output is correct
38 Correct 85 ms 28252 KB Output is correct
39 Correct 10 ms 20060 KB Output is correct
40 Correct 11 ms 20556 KB Output is correct
41 Correct 13 ms 20572 KB Output is correct
42 Correct 10 ms 20060 KB Output is correct
43 Correct 10 ms 20060 KB Output is correct
44 Correct 11 ms 20056 KB Output is correct
45 Correct 10 ms 20060 KB Output is correct
46 Correct 11 ms 20060 KB Output is correct
47 Correct 11 ms 20316 KB Output is correct
48 Correct 11 ms 20364 KB Output is correct
49 Correct 16 ms 21084 KB Output is correct
50 Correct 85 ms 28680 KB Output is correct
51 Correct 13 ms 20568 KB Output is correct
52 Correct 83 ms 26856 KB Output is correct
53 Correct 16 ms 21084 KB Output is correct
54 Correct 77 ms 27660 KB Output is correct
55 Correct 12 ms 20572 KB Output is correct
56 Correct 12 ms 20552 KB Output is correct
57 Correct 12 ms 20572 KB Output is correct
58 Correct 12 ms 20572 KB Output is correct
59 Correct 11 ms 20572 KB Output is correct
60 Correct 62 ms 25528 KB Output is correct
61 Correct 12 ms 20316 KB Output is correct
62 Correct 78 ms 27888 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 19800 KB Output is correct
2 Correct 10 ms 20060 KB Output is correct
3 Correct 9 ms 19800 KB Output is correct
4 Correct 9 ms 19804 KB Output is correct
5 Correct 10 ms 19804 KB Output is correct
6 Correct 8 ms 19804 KB Output is correct
7 Correct 9 ms 20060 KB Output is correct
8 Correct 9 ms 20060 KB Output is correct
9 Correct 9 ms 20056 KB Output is correct
10 Correct 8 ms 19804 KB Output is correct
11 Correct 8 ms 19804 KB Output is correct
12 Correct 10 ms 19804 KB Output is correct
13 Correct 9 ms 19804 KB Output is correct
14 Correct 8 ms 19800 KB Output is correct
15 Correct 11 ms 19800 KB Output is correct
16 Correct 9 ms 19804 KB Output is correct
17 Correct 8 ms 19800 KB Output is correct
18 Correct 8 ms 19808 KB Output is correct
19 Correct 8 ms 19864 KB Output is correct
20 Correct 8 ms 19800 KB Output is correct
21 Correct 9 ms 20064 KB Output is correct
22 Correct 8 ms 19804 KB Output is correct
23 Correct 8 ms 20064 KB Output is correct
24 Correct 8 ms 19804 KB Output is correct
25 Correct 9 ms 20056 KB Output is correct
26 Correct 8 ms 19804 KB Output is correct
27 Correct 9 ms 20032 KB Output is correct
28 Correct 9 ms 19812 KB Output is correct
29 Correct 10 ms 20060 KB Output is correct
30 Correct 8 ms 19804 KB Output is correct
31 Correct 8 ms 19932 KB Output is correct
32 Correct 8 ms 19800 KB Output is correct
33 Correct 9 ms 20060 KB Output is correct
34 Correct 10 ms 20060 KB Output is correct
35 Correct 63 ms 25668 KB Output is correct
36 Correct 83 ms 28336 KB Output is correct
37 Correct 82 ms 28500 KB Output is correct
38 Correct 85 ms 28252 KB Output is correct
39 Correct 10 ms 20060 KB Output is correct
40 Correct 11 ms 20556 KB Output is correct
41 Correct 13 ms 20572 KB Output is correct
42 Correct 10 ms 20060 KB Output is correct
43 Correct 10 ms 20060 KB Output is correct
44 Correct 11 ms 20056 KB Output is correct
45 Correct 10 ms 20060 KB Output is correct
46 Correct 11 ms 20060 KB Output is correct
47 Correct 11 ms 20316 KB Output is correct
48 Correct 11 ms 20364 KB Output is correct
49 Correct 16 ms 21084 KB Output is correct
50 Correct 85 ms 28680 KB Output is correct
51 Correct 13 ms 20568 KB Output is correct
52 Correct 83 ms 26856 KB Output is correct
53 Correct 16 ms 21084 KB Output is correct
54 Correct 77 ms 27660 KB Output is correct
55 Correct 12 ms 20572 KB Output is correct
56 Correct 12 ms 20552 KB Output is correct
57 Correct 12 ms 20572 KB Output is correct
58 Correct 12 ms 20572 KB Output is correct
59 Correct 11 ms 20572 KB Output is correct
60 Correct 62 ms 25528 KB Output is correct
61 Correct 12 ms 20316 KB Output is correct
62 Correct 78 ms 27888 KB Output is correct
63 Correct 457 ms 68028 KB Output is correct
64 Correct 470 ms 67668 KB Output is correct
65 Correct 476 ms 67540 KB Output is correct
66 Correct 169 ms 33804 KB Output is correct
67 Correct 381 ms 61788 KB Output is correct
68 Correct 173 ms 33664 KB Output is correct
69 Correct 323 ms 35200 KB Output is correct
70 Correct 179 ms 33624 KB Output is correct
71 Correct 186 ms 33688 KB Output is correct
72 Correct 379 ms 46152 KB Output is correct
73 Correct 378 ms 47700 KB Output is correct
74 Correct 901 ms 70736 KB Output is correct
75 Correct 451 ms 41552 KB Output is correct
76 Correct 646 ms 55152 KB Output is correct
77 Correct 661 ms 55428 KB Output is correct
78 Correct 184 ms 37272 KB Output is correct
79 Correct 332 ms 41640 KB Output is correct
80 Correct 180 ms 36168 KB Output is correct
81 Correct 271 ms 40044 KB Output is correct
82 Correct 709 ms 54332 KB Output is correct
83 Correct 700 ms 54356 KB Output is correct
84 Correct 526 ms 53108 KB Output is correct
85 Correct 550 ms 53332 KB Output is correct
86 Correct 281 ms 66448 KB Output is correct
87 Correct 292 ms 68688 KB Output is correct
88 Correct 412 ms 47104 KB Output is correct
89 Correct 632 ms 53056 KB Output is correct