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답안 #431110

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
431110 2021-06-17T09:41:24 Z 2qbingxuan 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++17
100 / 100
 1753 ms 98416 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#ifdef local
#define safe cerr<<__PRETTY_FUNCTION__<<" line "<<__LINE__<<" safe\n"
#define pary(a...) danb(#a, a)
#define debug(a...) qqbx(#a, a)
template <typename ...T> void qqbx(const char *s, T ...a) {
    int cnt = sizeof...(T);
    ((std::cerr << "\033[1;32m(" << s << ") = (") , ... , (std::cerr << a << (--cnt ? ", " : ")\033[0m\n")));
}
template <typename T> void danb(const char *s, T L, T R) {
    std::cerr << "\033[1;32m[ " << s << " ] = [ ";
    for (int f = 0; L != R; ++L)
        std::cerr << (f++ ? ", " : "") << *L;
    std::cerr << " ]\033[0m\n";
}
#else
#define debug(...) ((void)0)
#define safe ((void)0)
#define pary(...) ((void)0)
#endif // local
#define all(v) begin(v),end(v)
#define pb emplace_back
#define sort_uni(v) sort(all(v)),v.erase(unique(all(v)),v.end())

using namespace std;
using ll = long long;
using ld = long double;
template <typename T> using min_heap = priority_queue<T, vector<T>, greater<T>>;
const int mod = 1000000007;
const int inf = 1e9;
const ll INF = 1e18;
const int maxn = 100025;

int pa[maxn], sz[maxn];
int anc(int x) { return x==pa[x] ? x : pa[x]=anc(pa[x]); }
set<int> in[maxn], cc[maxn];
set<int> s_in[maxn], s_out[maxn];
queue<pair<int,int>> que;
ll ans = 0;
bool join(int x, int y) {
    x = anc(x);
    y = anc(y);
    if (x == y)
        return false;
    if (sz[x] > sz[y]) swap(x, y);
    ans -= 1LL * sz[x] * (sz[x] - 1) + sz[x] * ll(in[x].size());
    ans -= 1LL * sz[y] * (sz[y] - 1) + sz[y] * ll(in[y].size());
    pa[x] = y;
    sz[y] += sz[x];
    for (int z: s_in[x]) {
        if (s_out[y].count(z)) {
            que.emplace(y, z);
        }
    }
    for (int z: s_out[x]) {
        if (s_in[y].count(z)) {
            que.emplace(y, z);
        }
    }
    for (int z: s_out[x]) {
        s_in[z].erase(x);
        s_in[z].insert(y);
    }
    for (int z: s_in[x]) {
        s_out[z].erase(x);
        s_out[z].insert(y);
    }
    s_in[y].erase(x);
    s_out[y].erase(x);
    for (int z: s_out[x])
        if (z != y)
            s_out[y].insert(z);
    for (int z: s_in[x])
        if (z != y)
            s_in[y].insert(z);

    for (int i: cc[x]) in[y].erase(i);
    for (int i: cc[x]) cc[y].insert(i);
    for (int i: in[x]) if (!cc[y].count(i)) in[y].insert(i);
    ans += 1LL * sz[y] * (sz[y] - 1) + sz[y] * ll(in[y].size());
    return true;
}
int ADJ[2025][2025];
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0);
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < n; i++) pa[i] = i, sz[i] = 1, cc[i].insert(i);
    vector<pair<int,int>> edges;
    while (m--) {
        int a, b;
        cin >> a >> b;
        --a, --b;
        if (s_out[anc(b)].count(anc(a))) {
            que.emplace(a, b);
            while (!que.empty()) {
                auto [s, t] = que.front(); que.pop();
                join(s, t);
            }
        }
        if (anc(a) != anc(b)) {
            s_out[anc(a)].insert(anc(b));
            s_in[anc(b)].insert(anc(a));

            if (!in[anc(b)].count(a))
                ans += sz[anc(b)];
            in[anc(b)].insert(a);
        }
        cout << ans << '\n';
    }
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 19020 KB Output is correct
2 Correct 13 ms 19012 KB Output is correct
3 Correct 13 ms 19128 KB Output is correct
4 Correct 13 ms 19020 KB Output is correct
5 Correct 13 ms 19020 KB Output is correct
6 Correct 13 ms 19112 KB Output is correct
7 Correct 15 ms 19164 KB Output is correct
8 Correct 14 ms 19168 KB Output is correct
9 Correct 14 ms 19148 KB Output is correct
10 Correct 12 ms 19036 KB Output is correct
11 Correct 13 ms 19052 KB Output is correct
12 Correct 12 ms 19020 KB Output is correct
13 Correct 14 ms 19020 KB Output is correct
14 Correct 13 ms 19100 KB Output is correct
15 Correct 13 ms 19136 KB Output is correct
16 Correct 13 ms 19044 KB Output is correct
17 Correct 13 ms 19020 KB Output is correct
18 Correct 13 ms 19020 KB Output is correct
19 Correct 14 ms 19020 KB Output is correct
20 Correct 15 ms 19148 KB Output is correct
21 Correct 16 ms 19104 KB Output is correct
22 Correct 13 ms 19148 KB Output is correct
23 Correct 13 ms 19080 KB Output is correct
24 Correct 13 ms 19148 KB Output is correct
25 Correct 15 ms 19148 KB Output is correct
26 Correct 13 ms 19092 KB Output is correct
27 Correct 12 ms 19116 KB Output is correct
28 Correct 12 ms 19140 KB Output is correct
29 Correct 12 ms 19072 KB Output is correct
30 Correct 13 ms 19028 KB Output is correct
31 Correct 13 ms 19160 KB Output is correct
32 Correct 13 ms 19020 KB Output is correct
33 Correct 13 ms 19160 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 19020 KB Output is correct
2 Correct 13 ms 19012 KB Output is correct
3 Correct 13 ms 19128 KB Output is correct
4 Correct 13 ms 19020 KB Output is correct
5 Correct 13 ms 19020 KB Output is correct
6 Correct 13 ms 19112 KB Output is correct
7 Correct 15 ms 19164 KB Output is correct
8 Correct 14 ms 19168 KB Output is correct
9 Correct 14 ms 19148 KB Output is correct
10 Correct 12 ms 19036 KB Output is correct
11 Correct 13 ms 19052 KB Output is correct
12 Correct 12 ms 19020 KB Output is correct
13 Correct 14 ms 19020 KB Output is correct
14 Correct 13 ms 19100 KB Output is correct
15 Correct 13 ms 19136 KB Output is correct
16 Correct 13 ms 19044 KB Output is correct
17 Correct 13 ms 19020 KB Output is correct
18 Correct 13 ms 19020 KB Output is correct
19 Correct 14 ms 19020 KB Output is correct
20 Correct 15 ms 19148 KB Output is correct
21 Correct 16 ms 19104 KB Output is correct
22 Correct 13 ms 19148 KB Output is correct
23 Correct 13 ms 19080 KB Output is correct
24 Correct 13 ms 19148 KB Output is correct
25 Correct 15 ms 19148 KB Output is correct
26 Correct 13 ms 19092 KB Output is correct
27 Correct 12 ms 19116 KB Output is correct
28 Correct 12 ms 19140 KB Output is correct
29 Correct 12 ms 19072 KB Output is correct
30 Correct 13 ms 19028 KB Output is correct
31 Correct 13 ms 19160 KB Output is correct
32 Correct 13 ms 19020 KB Output is correct
33 Correct 13 ms 19160 KB Output is correct
34 Correct 16 ms 19276 KB Output is correct
35 Correct 120 ms 22684 KB Output is correct
36 Correct 163 ms 25236 KB Output is correct
37 Correct 164 ms 25292 KB Output is correct
38 Correct 159 ms 24992 KB Output is correct
39 Correct 19 ms 19528 KB Output is correct
40 Correct 20 ms 20044 KB Output is correct
41 Correct 24 ms 19940 KB Output is correct
42 Correct 18 ms 19532 KB Output is correct
43 Correct 18 ms 19404 KB Output is correct
44 Correct 17 ms 19404 KB Output is correct
45 Correct 17 ms 19532 KB Output is correct
46 Correct 16 ms 19532 KB Output is correct
47 Correct 18 ms 19788 KB Output is correct
48 Correct 18 ms 19788 KB Output is correct
49 Correct 27 ms 20460 KB Output is correct
50 Correct 169 ms 25352 KB Output is correct
51 Correct 22 ms 19788 KB Output is correct
52 Correct 159 ms 23560 KB Output is correct
53 Correct 27 ms 20292 KB Output is correct
54 Correct 146 ms 24464 KB Output is correct
55 Correct 22 ms 19944 KB Output is correct
56 Correct 22 ms 19880 KB Output is correct
57 Correct 20 ms 19876 KB Output is correct
58 Correct 22 ms 19916 KB Output is correct
59 Correct 19 ms 20240 KB Output is correct
60 Correct 126 ms 22524 KB Output is correct
61 Correct 23 ms 19788 KB Output is correct
62 Correct 164 ms 24728 KB Output is correct

Subtask #3
83.0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 19020 KB Output is correct
2 Correct 13 ms 19012 KB Output is correct
3 Correct 13 ms 19128 KB Output is correct
4 Correct 13 ms 19020 KB Output is correct
5 Correct 13 ms 19020 KB Output is correct
6 Correct 13 ms 19112 KB Output is correct
7 Correct 15 ms 19164 KB Output is correct
8 Correct 14 ms 19168 KB Output is correct
9 Correct 14 ms 19148 KB Output is correct
10 Correct 12 ms 19036 KB Output is correct
11 Correct 13 ms 19052 KB Output is correct
12 Correct 12 ms 19020 KB Output is correct
13 Correct 14 ms 19020 KB Output is correct
14 Correct 13 ms 19100 KB Output is correct
15 Correct 13 ms 19136 KB Output is correct
16 Correct 13 ms 19044 KB Output is correct
17 Correct 13 ms 19020 KB Output is correct
18 Correct 13 ms 19020 KB Output is correct
19 Correct 14 ms 19020 KB Output is correct
20 Correct 15 ms 19148 KB Output is correct
21 Correct 16 ms 19104 KB Output is correct
22 Correct 13 ms 19148 KB Output is correct
23 Correct 13 ms 19080 KB Output is correct
24 Correct 13 ms 19148 KB Output is correct
25 Correct 15 ms 19148 KB Output is correct
26 Correct 13 ms 19092 KB Output is correct
27 Correct 12 ms 19116 KB Output is correct
28 Correct 12 ms 19140 KB Output is correct
29 Correct 12 ms 19072 KB Output is correct
30 Correct 13 ms 19028 KB Output is correct
31 Correct 13 ms 19160 KB Output is correct
32 Correct 13 ms 19020 KB Output is correct
33 Correct 13 ms 19160 KB Output is correct
34 Correct 16 ms 19276 KB Output is correct
35 Correct 120 ms 22684 KB Output is correct
36 Correct 163 ms 25236 KB Output is correct
37 Correct 164 ms 25292 KB Output is correct
38 Correct 159 ms 24992 KB Output is correct
39 Correct 19 ms 19528 KB Output is correct
40 Correct 20 ms 20044 KB Output is correct
41 Correct 24 ms 19940 KB Output is correct
42 Correct 18 ms 19532 KB Output is correct
43 Correct 18 ms 19404 KB Output is correct
44 Correct 17 ms 19404 KB Output is correct
45 Correct 17 ms 19532 KB Output is correct
46 Correct 16 ms 19532 KB Output is correct
47 Correct 18 ms 19788 KB Output is correct
48 Correct 18 ms 19788 KB Output is correct
49 Correct 27 ms 20460 KB Output is correct
50 Correct 169 ms 25352 KB Output is correct
51 Correct 22 ms 19788 KB Output is correct
52 Correct 159 ms 23560 KB Output is correct
53 Correct 27 ms 20292 KB Output is correct
54 Correct 146 ms 24464 KB Output is correct
55 Correct 22 ms 19944 KB Output is correct
56 Correct 22 ms 19880 KB Output is correct
57 Correct 20 ms 19876 KB Output is correct
58 Correct 22 ms 19916 KB Output is correct
59 Correct 19 ms 20240 KB Output is correct
60 Correct 126 ms 22524 KB Output is correct
61 Correct 23 ms 19788 KB Output is correct
62 Correct 164 ms 24728 KB Output is correct
63 Correct 647 ms 68828 KB Output is correct
64 Correct 647 ms 68804 KB Output is correct
65 Correct 641 ms 68792 KB Output is correct
66 Correct 349 ms 40772 KB Output is correct
67 Correct 800 ms 77564 KB Output is correct
68 Correct 384 ms 40780 KB Output is correct
69 Correct 712 ms 40516 KB Output is correct
70 Correct 377 ms 43076 KB Output is correct
71 Correct 394 ms 43052 KB Output is correct
72 Correct 800 ms 58176 KB Output is correct
73 Correct 810 ms 60248 KB Output is correct
74 Correct 1753 ms 82852 KB Output is correct
75 Correct 1089 ms 48476 KB Output is correct
76 Correct 1377 ms 65816 KB Output is correct
77 Correct 1298 ms 66100 KB Output is correct
78 Correct 400 ms 46648 KB Output is correct
79 Correct 647 ms 53184 KB Output is correct
80 Correct 488 ms 47756 KB Output is correct
81 Correct 799 ms 51780 KB Output is correct
82 Correct 1298 ms 62596 KB Output is correct
83 Correct 1292 ms 62420 KB Output is correct
84 Correct 976 ms 61320 KB Output is correct
85 Correct 991 ms 61476 KB Output is correct
86 Correct 671 ms 96152 KB Output is correct
87 Correct 699 ms 98416 KB Output is correct
88 Correct 758 ms 59812 KB Output is correct
89 Correct 1203 ms 64476 KB Output is correct