oj.uz

Submission #573446

# Submission time Handle Problem Language Result Execution time Memory
573446 2022-06-06T16:02:45 Z socpite Making Friends on Joitter is Fun (JOI20_joitter2) C++14
100 / 100
 578 ms 64580 KB 
#include<bits/stdc++.h>
using namespace std;

#define f first
#define s second

typedef long long ll;

const int maxn = 3e5+5;
const ll inf = 1e18;

int n, m;

ll ans = 0;

struct dsu{
    ll root = -1;
    set<pair<int, int>> in;
    set<pair<int, int>> out;
};

dsu up[maxn];

int Find(int x){
    if(up[x].root < 0)return x;
    else{
        up[x].root = Find(up[x].root);
        return up[x].root;
    }
}

struct edge{
    int a, b;
};

queue<edge> E;

void Union(int a, int b){
    auto it1 = up[b].out.lower_bound({a, 0});
    vector<pair<int, int>> tmp;
    for(it1; it1 != up[b].out.end(); it1++){
        if(it1->f != a)break;
        ans+=up[a].root;
        tmp.push_back(*it1);
    }
    for(auto x: tmp)up[b].out.erase(x);
    tmp.clear();
    for(auto it2 = up[a].in.lower_bound({Find(b), 0}); it2 != up[a].in.end(); it2++){
        if(it2->f != b)break;
        tmp.push_back(*it2);
    }
    for(auto x: tmp)up[a].in.erase(x);
    if(up[a].in.size() + up[a].out.size() < up[b].in.size() + up[b].out.size())swap(a, b);
    ans+=up[a].root*(-up[a].root-1);
    ans+=up[b].root*(-up[b].root-1);
    ans -= up[b].root*up[a].in.size();
    for(auto it = up[b].in.begin(); it != up[b].in.end(); it++){
        ans+=up[b].root;
        up[it->f].out.erase({b, it->s});
        E.push({it->s, a});
    }
    for(auto it = up[b].out.begin(); it != up[b].out.end(); it++){
        ans+=up[it->f].root;
        up[it->f].in.erase({b, it->s});
        E.push({it->s, it->f});
    }
    up[a].root+=up[b].root;
    up[b].root = a;
    ans-=up[a].root*(-up[a].root-1);
}

void add(edge x){
    int a = Find(x.a);
    int b = Find(x.b);
    if(a==b)return;
    auto it = up[a].in.lower_bound({b, 0});
    if(it != up[a].in.end() && it->f == b)Union(a, b);
    else{
        if(up[a].out.find({b, x.a}) != up[a].out.end())return;
        ans -= up[b].root;
        up[a].out.insert({b, x.a});
        up[b].in.insert({a, x.a});
    }
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m;
    while(m--){
        int a, b;
        cin >> a >> b;
        E.push({a, b});
        while(!E.empty()){
            auto x = E.front();
            E.pop();
            add(x);
        }
        cout << ans << "\n";
    }
}

Compilation message

joitter2.cpp: In function 'void Union(int, int)':
joitter2.cpp:41:9: warning: statement has no effect [-Wunused-value]
   41 |     for(it1; it1 != up[b].out.end(); it1++){
      |         ^~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 30856 KB Output is correct
2 Correct 16 ms 30848 KB Output is correct
3 Correct 19 ms 30836 KB Output is correct
4 Correct 18 ms 30780 KB Output is correct
5 Correct 19 ms 30832 KB Output is correct
6 Correct 18 ms 30804 KB Output is correct
7 Correct 17 ms 30776 KB Output is correct
8 Correct 16 ms 30804 KB Output is correct
9 Correct 18 ms 30840 KB Output is correct
10 Correct 16 ms 30776 KB Output is correct
11 Correct 16 ms 30804 KB Output is correct
12 Correct 21 ms 30804 KB Output is correct
13 Correct 18 ms 30776 KB Output is correct
14 Correct 20 ms 30852 KB Output is correct
15 Correct 16 ms 30804 KB Output is correct
16 Correct 16 ms 30804 KB Output is correct
17 Correct 17 ms 30852 KB Output is correct
18 Correct 16 ms 30856 KB Output is correct
19 Correct 15 ms 30760 KB Output is correct
20 Correct 16 ms 30820 KB Output is correct
21 Correct 17 ms 30884 KB Output is correct
22 Correct 17 ms 30804 KB Output is correct
23 Correct 17 ms 30800 KB Output is correct
24 Correct 18 ms 30856 KB Output is correct
25 Correct 19 ms 30804 KB Output is correct
26 Correct 16 ms 30804 KB Output is correct
27 Correct 16 ms 30812 KB Output is correct
28 Correct 15 ms 30824 KB Output is correct
29 Correct 15 ms 30744 KB Output is correct
30 Correct 16 ms 30812 KB Output is correct
31 Correct 17 ms 30860 KB Output is correct
32 Correct 18 ms 30744 KB Output is correct
33 Correct 16 ms 30804 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 30856 KB Output is correct
2 Correct 16 ms 30848 KB Output is correct
3 Correct 19 ms 30836 KB Output is correct
4 Correct 18 ms 30780 KB Output is correct
5 Correct 19 ms 30832 KB Output is correct
6 Correct 18 ms 30804 KB Output is correct
7 Correct 17 ms 30776 KB Output is correct
8 Correct 16 ms 30804 KB Output is correct
9 Correct 18 ms 30840 KB Output is correct
10 Correct 16 ms 30776 KB Output is correct
11 Correct 16 ms 30804 KB Output is correct
12 Correct 21 ms 30804 KB Output is correct
13 Correct 18 ms 30776 KB Output is correct
14 Correct 20 ms 30852 KB Output is correct
15 Correct 16 ms 30804 KB Output is correct
16 Correct 16 ms 30804 KB Output is correct
17 Correct 17 ms 30852 KB Output is correct
18 Correct 16 ms 30856 KB Output is correct
19 Correct 15 ms 30760 KB Output is correct
20 Correct 16 ms 30820 KB Output is correct
21 Correct 17 ms 30884 KB Output is correct
22 Correct 17 ms 30804 KB Output is correct
23 Correct 17 ms 30800 KB Output is correct
24 Correct 18 ms 30856 KB Output is correct
25 Correct 19 ms 30804 KB Output is correct
26 Correct 16 ms 30804 KB Output is correct
27 Correct 16 ms 30812 KB Output is correct
28 Correct 15 ms 30824 KB Output is correct
29 Correct 15 ms 30744 KB Output is correct
30 Correct 16 ms 30812 KB Output is correct
31 Correct 17 ms 30860 KB Output is correct
32 Correct 18 ms 30744 KB Output is correct
33 Correct 16 ms 30804 KB Output is correct
34 Correct 18 ms 30936 KB Output is correct
35 Correct 118 ms 36048 KB Output is correct
36 Correct 100 ms 38100 KB Output is correct
37 Correct 106 ms 38180 KB Output is correct
38 Correct 114 ms 37964 KB Output is correct
39 Correct 17 ms 30832 KB Output is correct
40 Correct 17 ms 30944 KB Output is correct
41 Correct 17 ms 31004 KB Output is correct
42 Correct 17 ms 30804 KB Output is correct
43 Correct 18 ms 31060 KB Output is correct
44 Correct 18 ms 30976 KB Output is correct
45 Correct 22 ms 30804 KB Output is correct
46 Correct 23 ms 31020 KB Output is correct
47 Correct 19 ms 30924 KB Output is correct
48 Correct 17 ms 30932 KB Output is correct
49 Correct 25 ms 31536 KB Output is correct
50 Correct 106 ms 38328 KB Output is correct
51 Correct 21 ms 31188 KB Output is correct
52 Correct 103 ms 37084 KB Output is correct
53 Correct 28 ms 31444 KB Output is correct
54 Correct 120 ms 37656 KB Output is correct
55 Correct 19 ms 31248 KB Output is correct
56 Correct 19 ms 31272 KB Output is correct
57 Correct 19 ms 31188 KB Output is correct
58 Correct 20 ms 31212 KB Output is correct
59 Correct 18 ms 30832 KB Output is correct
60 Correct 112 ms 35776 KB Output is correct
61 Correct 19 ms 31000 KB Output is correct
62 Correct 105 ms 37776 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 30856 KB Output is correct
2 Correct 16 ms 30848 KB Output is correct
3 Correct 19 ms 30836 KB Output is correct
4 Correct 18 ms 30780 KB Output is correct
5 Correct 19 ms 30832 KB Output is correct
6 Correct 18 ms 30804 KB Output is correct
7 Correct 17 ms 30776 KB Output is correct
8 Correct 16 ms 30804 KB Output is correct
9 Correct 18 ms 30840 KB Output is correct
10 Correct 16 ms 30776 KB Output is correct
11 Correct 16 ms 30804 KB Output is correct
12 Correct 21 ms 30804 KB Output is correct
13 Correct 18 ms 30776 KB Output is correct
14 Correct 20 ms 30852 KB Output is correct
15 Correct 16 ms 30804 KB Output is correct
16 Correct 16 ms 30804 KB Output is correct
17 Correct 17 ms 30852 KB Output is correct
18 Correct 16 ms 30856 KB Output is correct
19 Correct 15 ms 30760 KB Output is correct
20 Correct 16 ms 30820 KB Output is correct
21 Correct 17 ms 30884 KB Output is correct
22 Correct 17 ms 30804 KB Output is correct
23 Correct 17 ms 30800 KB Output is correct
24 Correct 18 ms 30856 KB Output is correct
25 Correct 19 ms 30804 KB Output is correct
26 Correct 16 ms 30804 KB Output is correct
27 Correct 16 ms 30812 KB Output is correct
28 Correct 15 ms 30824 KB Output is correct
29 Correct 15 ms 30744 KB Output is correct
30 Correct 16 ms 30812 KB Output is correct
31 Correct 17 ms 30860 KB Output is correct
32 Correct 18 ms 30744 KB Output is correct
33 Correct 16 ms 30804 KB Output is correct
34 Correct 18 ms 30936 KB Output is correct
35 Correct 118 ms 36048 KB Output is correct
36 Correct 100 ms 38100 KB Output is correct
37 Correct 106 ms 38180 KB Output is correct
38 Correct 114 ms 37964 KB Output is correct
39 Correct 17 ms 30832 KB Output is correct
40 Correct 17 ms 30944 KB Output is correct
41 Correct 17 ms 31004 KB Output is correct
42 Correct 17 ms 30804 KB Output is correct
43 Correct 18 ms 31060 KB Output is correct
44 Correct 18 ms 30976 KB Output is correct
45 Correct 22 ms 30804 KB Output is correct
46 Correct 23 ms 31020 KB Output is correct
47 Correct 19 ms 30924 KB Output is correct
48 Correct 17 ms 30932 KB Output is correct
49 Correct 25 ms 31536 KB Output is correct
50 Correct 106 ms 38328 KB Output is correct
51 Correct 21 ms 31188 KB Output is correct
52 Correct 103 ms 37084 KB Output is correct
53 Correct 28 ms 31444 KB Output is correct
54 Correct 120 ms 37656 KB Output is correct
55 Correct 19 ms 31248 KB Output is correct
56 Correct 19 ms 31272 KB Output is correct
57 Correct 19 ms 31188 KB Output is correct
58 Correct 20 ms 31212 KB Output is correct
59 Correct 18 ms 30832 KB Output is correct
60 Correct 112 ms 35776 KB Output is correct
61 Correct 19 ms 31000 KB Output is correct
62 Correct 105 ms 37776 KB Output is correct
63 Correct 345 ms 64528 KB Output is correct
64 Correct 329 ms 64344 KB Output is correct
65 Correct 311 ms 64580 KB Output is correct
66 Correct 84 ms 35144 KB Output is correct
67 Correct 151 ms 39444 KB Output is correct
68 Correct 88 ms 35276 KB Output is correct
69 Correct 222 ms 39892 KB Output is correct
70 Correct 116 ms 35176 KB Output is correct
71 Correct 126 ms 35144 KB Output is correct
72 Correct 179 ms 39844 KB Output is correct
73 Correct 187 ms 39804 KB Output is correct
74 Correct 578 ms 57208 KB Output is correct
75 Correct 326 ms 45264 KB Output is correct
76 Correct 462 ms 50632 KB Output is correct
77 Correct 491 ms 50768 KB Output is correct
78 Correct 119 ms 39956 KB Output is correct
79 Correct 268 ms 43604 KB Output is correct
80 Correct 133 ms 39884 KB Output is correct
81 Correct 214 ms 43144 KB Output is correct
82 Correct 496 ms 53468 KB Output is correct
83 Correct 454 ms 53412 KB Output is correct
84 Correct 344 ms 53512 KB Output is correct
85 Correct 383 ms 53432 KB Output is correct
86 Correct 105 ms 34452 KB Output is correct
87 Correct 158 ms 36592 KB Output is correct
88 Correct 180 ms 39984 KB Output is correct
89 Correct 439 ms 50232 KB Output is correct