oj.uz

Submission #357820

# Submission time Handle Problem Language Result Execution time Memory
357820 2021-01-24T17:53:57 Z parsabahrami Making Friends on Joitter is Fun (JOI20_joitter2) C++17
100 / 100
 1304 ms 68716 KB 
// Call my Name and Save me from The Dark
#include <bits/stdc++.h>
 
using namespace std;

typedef long long int ll;
typedef pair<int, int> pii;
 
#define SZ(x)                       (int) x.size()
#define F                           first
#define S                           second

const int N = 1e5 + 10;
int S[N], rt[N], n, m; ll ret; set<int> in[N], out[N], comp[N];
queue<pii> Q;

int Find(int v) {
    return !rt[v] ? v : rt[v] = Find(rt[v]);
}

inline void add_edge(int u, int v) {
    out[u].insert(v), in[v].insert(u);
    if (out[v].count(u)) Q.push({u, v});
}

void Union(int u, int v) {
    u = Find(u), v = Find(v);
    if  (u == v) return;
    if (SZ(comp[u]) + SZ(in[u]) + SZ(out[u]) > SZ(comp[v]) + SZ(in[v]) + SZ(out[v])) swap(u, v);
    ret += 1ll * S[u] * SZ(comp[v]) + 1ll * S[v] * SZ(comp[u]);
    rt[u] = v;
    S[v] += S[u];
    for (int w : comp[u]) {
        if (comp[v].count(w)) ret -= S[v];
        else comp[v].insert(w);
    } 
    in[u].erase(v), out[u].erase(v), in[v].erase(u), out[v].erase(u);
    for (int w : in[u]) {
        out[w].erase(u);
        add_edge(w, v);
    } 
    for (int w : out[u]) {
        in[w].erase(u);
        add_edge(v, w);
    }
}

int main() {
    fill(S, S + N, 1);
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; i++) comp[i].insert(i);
    for (; m; m--) {
        int u, v; scanf("%d%d", &u, &v);
        v = Find(v);
        if (Find(u) != v && !comp[v].count(u)) {
            comp[v].insert(u);
            ret += S[v];
            add_edge(Find(u), v);
            while (SZ(Q)) {
                int U = Q.front().F, V = Q.front().S; Q.pop();
                Union(U, V);
            }
        }
        printf("%lld\n", ret);
    }
    return 0;
}

Compilation message

joitter2.cpp: In function 'int main()':
joitter2.cpp:50:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   50 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
joitter2.cpp:53:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   53 |         int u, v; scanf("%d%d", &u, &v);
      |                   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 14828 KB Output is correct
2 Correct 10 ms 14828 KB Output is correct
3 Correct 10 ms 14828 KB Output is correct
4 Correct 10 ms 14828 KB Output is correct
5 Correct 10 ms 14848 KB Output is correct
6 Correct 10 ms 14828 KB Output is correct
7 Correct 11 ms 14828 KB Output is correct
8 Correct 11 ms 14828 KB Output is correct
9 Correct 11 ms 14828 KB Output is correct
10 Correct 11 ms 14828 KB Output is correct
11 Correct 11 ms 14828 KB Output is correct
12 Correct 10 ms 14828 KB Output is correct
13 Correct 10 ms 14828 KB Output is correct
14 Correct 10 ms 14828 KB Output is correct
15 Correct 10 ms 14828 KB Output is correct
16 Correct 10 ms 14828 KB Output is correct
17 Correct 10 ms 14828 KB Output is correct
18 Correct 10 ms 14828 KB Output is correct
19 Correct 10 ms 14828 KB Output is correct
20 Correct 11 ms 14828 KB Output is correct
21 Correct 11 ms 14828 KB Output is correct
22 Correct 10 ms 14828 KB Output is correct
23 Correct 11 ms 14828 KB Output is correct
24 Correct 11 ms 14828 KB Output is correct
25 Correct 11 ms 14828 KB Output is correct
26 Correct 10 ms 14828 KB Output is correct
27 Correct 10 ms 14828 KB Output is correct
28 Correct 10 ms 14828 KB Output is correct
29 Correct 10 ms 14828 KB Output is correct
30 Correct 10 ms 14828 KB Output is correct
31 Correct 11 ms 14828 KB Output is correct
32 Correct 11 ms 14828 KB Output is correct
33 Correct 11 ms 14956 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 14828 KB Output is correct
2 Correct 10 ms 14828 KB Output is correct
3 Correct 10 ms 14828 KB Output is correct
4 Correct 10 ms 14828 KB Output is correct
5 Correct 10 ms 14848 KB Output is correct
6 Correct 10 ms 14828 KB Output is correct
7 Correct 11 ms 14828 KB Output is correct
8 Correct 11 ms 14828 KB Output is correct
9 Correct 11 ms 14828 KB Output is correct
10 Correct 11 ms 14828 KB Output is correct
11 Correct 11 ms 14828 KB Output is correct
12 Correct 10 ms 14828 KB Output is correct
13 Correct 10 ms 14828 KB Output is correct
14 Correct 10 ms 14828 KB Output is correct
15 Correct 10 ms 14828 KB Output is correct
16 Correct 10 ms 14828 KB Output is correct
17 Correct 10 ms 14828 KB Output is correct
18 Correct 10 ms 14828 KB Output is correct
19 Correct 10 ms 14828 KB Output is correct
20 Correct 11 ms 14828 KB Output is correct
21 Correct 11 ms 14828 KB Output is correct
22 Correct 10 ms 14828 KB Output is correct
23 Correct 11 ms 14828 KB Output is correct
24 Correct 11 ms 14828 KB Output is correct
25 Correct 11 ms 14828 KB Output is correct
26 Correct 10 ms 14828 KB Output is correct
27 Correct 10 ms 14828 KB Output is correct
28 Correct 10 ms 14828 KB Output is correct
29 Correct 10 ms 14828 KB Output is correct
30 Correct 10 ms 14828 KB Output is correct
31 Correct 11 ms 14828 KB Output is correct
32 Correct 11 ms 14828 KB Output is correct
33 Correct 11 ms 14956 KB Output is correct
34 Correct 14 ms 14956 KB Output is correct
35 Correct 140 ms 20780 KB Output is correct
36 Correct 166 ms 23532 KB Output is correct
37 Correct 158 ms 23532 KB Output is correct
38 Correct 152 ms 23148 KB Output is correct
39 Correct 13 ms 15212 KB Output is correct
40 Correct 15 ms 15596 KB Output is correct
41 Correct 15 ms 15468 KB Output is correct
42 Correct 13 ms 15212 KB Output is correct
43 Correct 19 ms 15212 KB Output is correct
44 Correct 15 ms 15212 KB Output is correct
45 Correct 14 ms 15212 KB Output is correct
46 Correct 15 ms 15212 KB Output is correct
47 Correct 17 ms 15340 KB Output is correct
48 Correct 15 ms 15340 KB Output is correct
49 Correct 25 ms 16108 KB Output is correct
50 Correct 154 ms 23660 KB Output is correct
51 Correct 21 ms 15468 KB Output is correct
52 Correct 138 ms 22252 KB Output is correct
53 Correct 23 ms 15980 KB Output is correct
54 Correct 147 ms 22784 KB Output is correct
55 Correct 17 ms 15616 KB Output is correct
56 Correct 17 ms 15596 KB Output is correct
57 Correct 19 ms 15596 KB Output is correct
58 Correct 16 ms 15596 KB Output is correct
59 Correct 15 ms 15596 KB Output is correct
60 Correct 118 ms 20460 KB Output is correct
61 Correct 16 ms 15468 KB Output is correct
62 Correct 152 ms 23148 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 14828 KB Output is correct
2 Correct 10 ms 14828 KB Output is correct
3 Correct 10 ms 14828 KB Output is correct
4 Correct 10 ms 14828 KB Output is correct
5 Correct 10 ms 14848 KB Output is correct
6 Correct 10 ms 14828 KB Output is correct
7 Correct 11 ms 14828 KB Output is correct
8 Correct 11 ms 14828 KB Output is correct
9 Correct 11 ms 14828 KB Output is correct
10 Correct 11 ms 14828 KB Output is correct
11 Correct 11 ms 14828 KB Output is correct
12 Correct 10 ms 14828 KB Output is correct
13 Correct 10 ms 14828 KB Output is correct
14 Correct 10 ms 14828 KB Output is correct
15 Correct 10 ms 14828 KB Output is correct
16 Correct 10 ms 14828 KB Output is correct
17 Correct 10 ms 14828 KB Output is correct
18 Correct 10 ms 14828 KB Output is correct
19 Correct 10 ms 14828 KB Output is correct
20 Correct 11 ms 14828 KB Output is correct
21 Correct 11 ms 14828 KB Output is correct
22 Correct 10 ms 14828 KB Output is correct
23 Correct 11 ms 14828 KB Output is correct
24 Correct 11 ms 14828 KB Output is correct
25 Correct 11 ms 14828 KB Output is correct
26 Correct 10 ms 14828 KB Output is correct
27 Correct 10 ms 14828 KB Output is correct
28 Correct 10 ms 14828 KB Output is correct
29 Correct 10 ms 14828 KB Output is correct
30 Correct 10 ms 14828 KB Output is correct
31 Correct 11 ms 14828 KB Output is correct
32 Correct 11 ms 14828 KB Output is correct
33 Correct 11 ms 14956 KB Output is correct
34 Correct 14 ms 14956 KB Output is correct
35 Correct 140 ms 20780 KB Output is correct
36 Correct 166 ms 23532 KB Output is correct
37 Correct 158 ms 23532 KB Output is correct
38 Correct 152 ms 23148 KB Output is correct
39 Correct 13 ms 15212 KB Output is correct
40 Correct 15 ms 15596 KB Output is correct
41 Correct 15 ms 15468 KB Output is correct
42 Correct 13 ms 15212 KB Output is correct
43 Correct 19 ms 15212 KB Output is correct
44 Correct 15 ms 15212 KB Output is correct
45 Correct 14 ms 15212 KB Output is correct
46 Correct 15 ms 15212 KB Output is correct
47 Correct 17 ms 15340 KB Output is correct
48 Correct 15 ms 15340 KB Output is correct
49 Correct 25 ms 16108 KB Output is correct
50 Correct 154 ms 23660 KB Output is correct
51 Correct 21 ms 15468 KB Output is correct
52 Correct 138 ms 22252 KB Output is correct
53 Correct 23 ms 15980 KB Output is correct
54 Correct 147 ms 22784 KB Output is correct
55 Correct 17 ms 15616 KB Output is correct
56 Correct 17 ms 15596 KB Output is correct
57 Correct 19 ms 15596 KB Output is correct
58 Correct 16 ms 15596 KB Output is correct
59 Correct 15 ms 15596 KB Output is correct
60 Correct 118 ms 20460 KB Output is correct
61 Correct 16 ms 15468 KB Output is correct
62 Correct 152 ms 23148 KB Output is correct
63 Correct 653 ms 67428 KB Output is correct
64 Correct 655 ms 67308 KB Output is correct
65 Correct 645 ms 67308 KB Output is correct
66 Correct 294 ms 33772 KB Output is correct
67 Correct 584 ms 60780 KB Output is correct
68 Correct 289 ms 33772 KB Output is correct
69 Correct 594 ms 35052 KB Output is correct
70 Correct 348 ms 33772 KB Output is correct
71 Correct 354 ms 33772 KB Output is correct
72 Correct 613 ms 44668 KB Output is correct
73 Correct 634 ms 46400 KB Output is correct
74 Correct 1304 ms 68516 KB Output is correct
75 Correct 824 ms 41596 KB Output is correct
76 Correct 1016 ms 53740 KB Output is correct
77 Correct 1029 ms 53868 KB Output is correct
78 Correct 324 ms 37612 KB Output is correct
79 Correct 573 ms 41708 KB Output is correct
80 Correct 292 ms 36124 KB Output is correct
81 Correct 510 ms 39936 KB Output is correct
82 Correct 1083 ms 54380 KB Output is correct
83 Correct 1128 ms 54636 KB Output is correct
84 Correct 850 ms 53100 KB Output is correct
85 Correct 836 ms 53036 KB Output is correct
86 Correct 431 ms 66668 KB Output is correct
87 Correct 502 ms 68716 KB Output is correct
88 Correct 628 ms 45632 KB Output is correct
89 Correct 1006 ms 51696 KB Output is correct