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답안 #212014

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
212014 2020-03-22T03:37:27 Z Mercenary 조이터에서 친구를 만드는건 재밌어 (JOI20_joitter2) C++14
100 / 100
 677 ms 50928 KB 
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/trie_policy.hpp>

#define pb push_back
#define mp make_pair
#define taskname "A"

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef double ld;
typedef pair<int,int> ii;
typedef tree <int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

const int maxn = 1e5 + 5;
const int mod = 1e9 + 7;
int n , m;
ll res = 0;

int lab[maxn];
set<int> in[maxn],out[maxn];
vector<int> node[maxn];
int FindLab(int u){return lab[u] < 0 ? u : lab[u] = FindLab(lab[u]);}
void Merge(int u , int v){
    u = FindLab(u);v = FindLab(v);
    if(u == v)return;
    res -= (ll)in[u].size() * node[u].size();
    res -= (ll)in[v].size() * node[v].size();
    res -= (ll)node[u].size() * ((int)node[u].size() - 1);
    res -= (ll)node[v].size() * ((int)node[v].size() - 1);
    if(in[u].size() + out[u].size() + node[u].size() < in[v].size() + out[v].size() + node[v].size())
        swap(u , v);
    lab[u] += lab[v];
    lab[v] = u;
    for(auto & c : node[v]){
        node[u].pb(c);
        in[u].erase(c);
    }
    vector<int> add;
    for(auto & c : in[v]){
        if(out[u].find(FindLab(c)) != out[u].end()){
            add.pb(c);
        }
        if(FindLab(c) != u){
            out[FindLab(c)].erase(v);
            out[FindLab(c)].insert(u);
            in[u].insert(c);
        }
    }
    for(auto & c : out[v]){
        if(FindLab(c) != u)out[u].insert(c);
        if(out[c].find(u) != out[c].end()){
            add.pb(c);;
        }
    }
    out[u].erase(v);
    res += (ll)in[u].size() * node[u].size();
    res += (ll)node[u].size() * ((int)node[u].size() - 1);
    for(auto c : add){
        Merge(u,c);
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen(taskname".INP","r")){
		freopen(taskname".INP", "r",stdin);
		freopen(taskname".OUT", "w",stdout);
    }
    cin >> n >> m;
    for(int i = 1 ; i <= n ; ++i){
        lab[i] = -1;node[i].pb(i);
    }
    for(int i = 1 ; i <= m ; ++i){
        int u , v;cin >> u >> v;
        if(FindLab(u) != FindLab(v)){
            if(out[FindLab(v)].find(FindLab(u)) != out[FindLab(v)].end()){
                Merge(u,v);
            }else if(in[FindLab(v)].find(u) == in[FindLab(v)].end()){
                in[FindLab(v)].insert(u);
                res += node[FindLab(v)].size();
                out[FindLab(u)].insert(FindLab(v));
            }
        }
        cout << res << '\n';
    }
}

Compilation message

joitter2.cpp: In function 'int main()':
joitter2.cpp:71:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".INP", "r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
joitter2.cpp:72:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".OUT", "w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 11 ms 12032 KB Output is correct
3 Correct 12 ms 12032 KB Output is correct
4 Correct 12 ms 12160 KB Output is correct
5 Correct 12 ms 12032 KB Output is correct
6 Correct 11 ms 12160 KB Output is correct
7 Correct 12 ms 12160 KB Output is correct
8 Correct 13 ms 12160 KB Output is correct
9 Correct 13 ms 12160 KB Output is correct
10 Correct 12 ms 12032 KB Output is correct
11 Correct 13 ms 12416 KB Output is correct
12 Correct 12 ms 12160 KB Output is correct
13 Correct 12 ms 12160 KB Output is correct
14 Correct 11 ms 12032 KB Output is correct
15 Correct 12 ms 12032 KB Output is correct
16 Correct 12 ms 12032 KB Output is correct
17 Correct 11 ms 12160 KB Output is correct
18 Correct 13 ms 12048 KB Output is correct
19 Correct 12 ms 12032 KB Output is correct
20 Correct 11 ms 12160 KB Output is correct
21 Correct 12 ms 12160 KB Output is correct
22 Correct 12 ms 12160 KB Output is correct
23 Correct 12 ms 12160 KB Output is correct
24 Correct 11 ms 12032 KB Output is correct
25 Correct 12 ms 12160 KB Output is correct
26 Correct 11 ms 12032 KB Output is correct
27 Correct 11 ms 12032 KB Output is correct
28 Correct 12 ms 12032 KB Output is correct
29 Correct 12 ms 12160 KB Output is correct
30 Correct 12 ms 12160 KB Output is correct
31 Correct 12 ms 12064 KB Output is correct
32 Correct 11 ms 12032 KB Output is correct
33 Correct 12 ms 12160 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 11 ms 12032 KB Output is correct
3 Correct 12 ms 12032 KB Output is correct
4 Correct 12 ms 12160 KB Output is correct
5 Correct 12 ms 12032 KB Output is correct
6 Correct 11 ms 12160 KB Output is correct
7 Correct 12 ms 12160 KB Output is correct
8 Correct 13 ms 12160 KB Output is correct
9 Correct 13 ms 12160 KB Output is correct
10 Correct 12 ms 12032 KB Output is correct
11 Correct 13 ms 12416 KB Output is correct
12 Correct 12 ms 12160 KB Output is correct
13 Correct 12 ms 12160 KB Output is correct
14 Correct 11 ms 12032 KB Output is correct
15 Correct 12 ms 12032 KB Output is correct
16 Correct 12 ms 12032 KB Output is correct
17 Correct 11 ms 12160 KB Output is correct
18 Correct 13 ms 12048 KB Output is correct
19 Correct 12 ms 12032 KB Output is correct
20 Correct 11 ms 12160 KB Output is correct
21 Correct 12 ms 12160 KB Output is correct
22 Correct 12 ms 12160 KB Output is correct
23 Correct 12 ms 12160 KB Output is correct
24 Correct 11 ms 12032 KB Output is correct
25 Correct 12 ms 12160 KB Output is correct
26 Correct 11 ms 12032 KB Output is correct
27 Correct 11 ms 12032 KB Output is correct
28 Correct 12 ms 12032 KB Output is correct
29 Correct 12 ms 12160 KB Output is correct
30 Correct 12 ms 12160 KB Output is correct
31 Correct 12 ms 12064 KB Output is correct
32 Correct 11 ms 12032 KB Output is correct
33 Correct 12 ms 12160 KB Output is correct
34 Correct 14 ms 12160 KB Output is correct
35 Correct 94 ms 15256 KB Output is correct
36 Correct 114 ms 17144 KB Output is correct
37 Correct 119 ms 17196 KB Output is correct
38 Correct 111 ms 16888 KB Output is correct
39 Correct 13 ms 12288 KB Output is correct
40 Correct 14 ms 12416 KB Output is correct
41 Correct 15 ms 12416 KB Output is correct
42 Correct 13 ms 12288 KB Output is correct
43 Correct 14 ms 12288 KB Output is correct
44 Correct 14 ms 12288 KB Output is correct
45 Correct 14 ms 12416 KB Output is correct
46 Correct 13 ms 12288 KB Output is correct
47 Correct 14 ms 12288 KB Output is correct
48 Correct 14 ms 12416 KB Output is correct
49 Correct 20 ms 12928 KB Output is correct
50 Correct 117 ms 17272 KB Output is correct
51 Correct 18 ms 12544 KB Output is correct
52 Correct 109 ms 16120 KB Output is correct
53 Correct 20 ms 12928 KB Output is correct
54 Correct 106 ms 16632 KB Output is correct
55 Correct 15 ms 12544 KB Output is correct
56 Correct 16 ms 12544 KB Output is correct
57 Correct 16 ms 12928 KB Output is correct
58 Correct 15 ms 12800 KB Output is correct
59 Correct 17 ms 12416 KB Output is correct
60 Correct 93 ms 14712 KB Output is correct
61 Correct 15 ms 12416 KB Output is correct
62 Correct 111 ms 16888 KB Output is correct

Subtask #3
83.0 / 83.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 11 ms 12032 KB Output is correct
3 Correct 12 ms 12032 KB Output is correct
4 Correct 12 ms 12160 KB Output is correct
5 Correct 12 ms 12032 KB Output is correct
6 Correct 11 ms 12160 KB Output is correct
7 Correct 12 ms 12160 KB Output is correct
8 Correct 13 ms 12160 KB Output is correct
9 Correct 13 ms 12160 KB Output is correct
10 Correct 12 ms 12032 KB Output is correct
11 Correct 13 ms 12416 KB Output is correct
12 Correct 12 ms 12160 KB Output is correct
13 Correct 12 ms 12160 KB Output is correct
14 Correct 11 ms 12032 KB Output is correct
15 Correct 12 ms 12032 KB Output is correct
16 Correct 12 ms 12032 KB Output is correct
17 Correct 11 ms 12160 KB Output is correct
18 Correct 13 ms 12048 KB Output is correct
19 Correct 12 ms 12032 KB Output is correct
20 Correct 11 ms 12160 KB Output is correct
21 Correct 12 ms 12160 KB Output is correct
22 Correct 12 ms 12160 KB Output is correct
23 Correct 12 ms 12160 KB Output is correct
24 Correct 11 ms 12032 KB Output is correct
25 Correct 12 ms 12160 KB Output is correct
26 Correct 11 ms 12032 KB Output is correct
27 Correct 11 ms 12032 KB Output is correct
28 Correct 12 ms 12032 KB Output is correct
29 Correct 12 ms 12160 KB Output is correct
30 Correct 12 ms 12160 KB Output is correct
31 Correct 12 ms 12064 KB Output is correct
32 Correct 11 ms 12032 KB Output is correct
33 Correct 12 ms 12160 KB Output is correct
34 Correct 14 ms 12160 KB Output is correct
35 Correct 94 ms 15256 KB Output is correct
36 Correct 114 ms 17144 KB Output is correct
37 Correct 119 ms 17196 KB Output is correct
38 Correct 111 ms 16888 KB Output is correct
39 Correct 13 ms 12288 KB Output is correct
40 Correct 14 ms 12416 KB Output is correct
41 Correct 15 ms 12416 KB Output is correct
42 Correct 13 ms 12288 KB Output is correct
43 Correct 14 ms 12288 KB Output is correct
44 Correct 14 ms 12288 KB Output is correct
45 Correct 14 ms 12416 KB Output is correct
46 Correct 13 ms 12288 KB Output is correct
47 Correct 14 ms 12288 KB Output is correct
48 Correct 14 ms 12416 KB Output is correct
49 Correct 20 ms 12928 KB Output is correct
50 Correct 117 ms 17272 KB Output is correct
51 Correct 18 ms 12544 KB Output is correct
52 Correct 109 ms 16120 KB Output is correct
53 Correct 20 ms 12928 KB Output is correct
54 Correct 106 ms 16632 KB Output is correct
55 Correct 15 ms 12544 KB Output is correct
56 Correct 16 ms 12544 KB Output is correct
57 Correct 16 ms 12928 KB Output is correct
58 Correct 15 ms 12800 KB Output is correct
59 Correct 17 ms 12416 KB Output is correct
60 Correct 93 ms 14712 KB Output is correct
61 Correct 15 ms 12416 KB Output is correct
62 Correct 111 ms 16888 KB Output is correct
63 Correct 413 ms 45748 KB Output is correct
64 Correct 408 ms 45688 KB Output is correct
65 Correct 401 ms 45816 KB Output is correct
66 Correct 131 ms 22768 KB Output is correct
67 Correct 236 ms 28400 KB Output is correct
68 Correct 141 ms 22768 KB Output is correct
69 Correct 302 ms 24304 KB Output is correct
70 Correct 133 ms 22768 KB Output is correct
71 Correct 141 ms 22764 KB Output is correct
72 Correct 281 ms 26356 KB Output is correct
73 Correct 269 ms 26612 KB Output is correct
74 Correct 677 ms 45172 KB Output is correct
75 Correct 460 ms 29168 KB Output is correct
76 Correct 497 ms 36208 KB Output is correct
77 Correct 498 ms 36336 KB Output is correct
78 Correct 187 ms 26612 KB Output is correct
79 Correct 298 ms 29424 KB Output is correct
80 Correct 190 ms 26644 KB Output is correct
81 Correct 286 ms 28652 KB Output is correct
82 Correct 479 ms 38260 KB Output is correct
83 Correct 455 ms 38260 KB Output is correct
84 Correct 442 ms 50928 KB Output is correct
85 Correct 435 ms 50804 KB Output is correct
86 Correct 170 ms 26868 KB Output is correct
87 Correct 201 ms 27884 KB Output is correct
88 Correct 277 ms 26612 KB Output is correct
89 Correct 479 ms 34804 KB Output is correct