oj.uz

Submission #269328

# Submission time Handle Problem Language Result Execution time Memory
269328 2020-08-17T06:31:44 Z 문홍윤(#5112) Making Friends on Joitter is Fun (JOI20_joitter2) C++17
100 / 100
 793 ms 43768 KB 
#include <bits/stdc++.h>
#define eb emplace_back
#define mp make_pair
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define svec(x) sort(x.begin(), x.end())
#define press(x) x.erase(unique(x.begin(), x.end()), x.end())
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<LL, LL> pll;
typedef pair<int, LL> pil;
typedef pair<LL, int> pli;
const LL llinf=2e18;
const int inf=1e9;

int n, m;
LL ans;

int par[100010], sz[100010];
set<pii> od[100010];
set<int> id[100010];

void init(){for(int i=1; i<=100000; i++){par[i]=i, sz[i]=1;}}
int findpar(int num){return num==par[num]?num:par[num]=findpar(par[num]);}

void mergepar(int a, int b){
    int pa=findpar(a), pb=findpar(b);
    if(pa==pb)return;
    bool flg=false;
    auto lb=od[pb].lower_bound(mp(pa, -inf));
    if(lb!=od[pb].end()&&lb->F==pa)flg=true;
    if(!flg){
        ans-=(LL)sz[pb]*id[pb].size();
        id[pb].insert(a);
        od[pa].insert(mp(pb, a));
        ans+=(LL)sz[pb]*id[pb].size();
    }
    else{
        if(id[pa].size()+od[pa].size()>id[pb].size()+od[pb].size())swap(pa, pb);
        ans-=(LL)sz[pa]*id[pa].size();
        vector<pii> del;
        for(auto i:od[pa]){
            ans-=(LL)sz[i.F];
            id[i.F].erase(i.S);
            if(i.F!=pb)del.eb(i);
        }
        od[pa].clear();
        ans+=(LL)sz[pa]*id[pb].size();
        vector<int> del2;
        for(auto i:id[pa]){
            od[findpar(i)].erase(mp(pa, i));
            if(findpar(i)!=pb)del2.eb(i);
        }
        id[pa].clear();
        par[pa]=pb;
        ans+=2ll*sz[pa]*sz[pb];
        sz[pb]+=sz[pa];
        for(auto i:del2)mergepar(i, pb);
        for(auto i:del)mergepar(i.S, i.F);
    }
}

int main(){
    scanf("%d %d", &n, &m);
    init();
    for(int i=1; i<=m; i++){
        int a, b;
        scanf("%d %d", &a, &b);
        mergepar(a, b);
        printf("%lld\n", ans);
    }
}

Compilation message

joitter2.cpp: In function 'int main()':
joitter2.cpp:66:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   66 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
joitter2.cpp:70:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   70 |         scanf("%d %d", &a, &b);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 10496 KB Output is correct
2 Correct 7 ms 10496 KB Output is correct
3 Correct 9 ms 10496 KB Output is correct
4 Correct 8 ms 10496 KB Output is correct
5 Correct 7 ms 10496 KB Output is correct
6 Correct 8 ms 10496 KB Output is correct
7 Correct 9 ms 10496 KB Output is correct
8 Correct 9 ms 10496 KB Output is correct
9 Correct 8 ms 10624 KB Output is correct
10 Correct 9 ms 10496 KB Output is correct
11 Correct 7 ms 10496 KB Output is correct
12 Correct 7 ms 10496 KB Output is correct
13 Correct 7 ms 10496 KB Output is correct
14 Correct 8 ms 10496 KB Output is correct
15 Correct 7 ms 10496 KB Output is correct
16 Correct 8 ms 10496 KB Output is correct
17 Correct 7 ms 10496 KB Output is correct
18 Correct 7 ms 10496 KB Output is correct
19 Correct 7 ms 10496 KB Output is correct
20 Correct 7 ms 10496 KB Output is correct
21 Correct 8 ms 10496 KB Output is correct
22 Correct 7 ms 10496 KB Output is correct
23 Correct 8 ms 10496 KB Output is correct
24 Correct 8 ms 10496 KB Output is correct
25 Correct 8 ms 10496 KB Output is correct
26 Correct 7 ms 10496 KB Output is correct
27 Correct 8 ms 10496 KB Output is correct
28 Correct 7 ms 10496 KB Output is correct
29 Correct 7 ms 10496 KB Output is correct
30 Correct 7 ms 10496 KB Output is correct
31 Correct 8 ms 10496 KB Output is correct
32 Correct 9 ms 10496 KB Output is correct
33 Correct 8 ms 10496 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 10496 KB Output is correct
2 Correct 7 ms 10496 KB Output is correct
3 Correct 9 ms 10496 KB Output is correct
4 Correct 8 ms 10496 KB Output is correct
5 Correct 7 ms 10496 KB Output is correct
6 Correct 8 ms 10496 KB Output is correct
7 Correct 9 ms 10496 KB Output is correct
8 Correct 9 ms 10496 KB Output is correct
9 Correct 8 ms 10624 KB Output is correct
10 Correct 9 ms 10496 KB Output is correct
11 Correct 7 ms 10496 KB Output is correct
12 Correct 7 ms 10496 KB Output is correct
13 Correct 7 ms 10496 KB Output is correct
14 Correct 8 ms 10496 KB Output is correct
15 Correct 7 ms 10496 KB Output is correct
16 Correct 8 ms 10496 KB Output is correct
17 Correct 7 ms 10496 KB Output is correct
18 Correct 7 ms 10496 KB Output is correct
19 Correct 7 ms 10496 KB Output is correct
20 Correct 7 ms 10496 KB Output is correct
21 Correct 8 ms 10496 KB Output is correct
22 Correct 7 ms 10496 KB Output is correct
23 Correct 8 ms 10496 KB Output is correct
24 Correct 8 ms 10496 KB Output is correct
25 Correct 8 ms 10496 KB Output is correct
26 Correct 7 ms 10496 KB Output is correct
27 Correct 8 ms 10496 KB Output is correct
28 Correct 7 ms 10496 KB Output is correct
29 Correct 7 ms 10496 KB Output is correct
30 Correct 7 ms 10496 KB Output is correct
31 Correct 8 ms 10496 KB Output is correct
32 Correct 9 ms 10496 KB Output is correct
33 Correct 8 ms 10496 KB Output is correct
34 Correct 11 ms 10600 KB Output is correct
35 Correct 145 ms 15960 KB Output is correct
36 Correct 152 ms 18040 KB Output is correct
37 Correct 179 ms 17972 KB Output is correct
38 Correct 186 ms 17912 KB Output is correct
39 Correct 11 ms 10496 KB Output is correct
40 Correct 10 ms 10624 KB Output is correct
41 Correct 10 ms 10624 KB Output is correct
42 Correct 9 ms 10496 KB Output is correct
43 Correct 10 ms 10624 KB Output is correct
44 Correct 11 ms 10624 KB Output is correct
45 Correct 9 ms 10496 KB Output is correct
46 Correct 9 ms 10496 KB Output is correct
47 Correct 10 ms 10624 KB Output is correct
48 Correct 11 ms 10624 KB Output is correct
49 Correct 17 ms 11136 KB Output is correct
50 Correct 151 ms 18168 KB Output is correct
51 Correct 14 ms 10880 KB Output is correct
52 Correct 150 ms 17016 KB Output is correct
53 Correct 16 ms 11136 KB Output is correct
54 Correct 151 ms 17544 KB Output is correct
55 Correct 12 ms 10880 KB Output is correct
56 Correct 12 ms 10880 KB Output is correct
57 Correct 12 ms 10880 KB Output is correct
58 Correct 12 ms 11008 KB Output is correct
59 Correct 11 ms 10496 KB Output is correct
60 Correct 133 ms 15480 KB Output is correct
61 Correct 12 ms 10624 KB Output is correct
62 Correct 175 ms 17784 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 10496 KB Output is correct
2 Correct 7 ms 10496 KB Output is correct
3 Correct 9 ms 10496 KB Output is correct
4 Correct 8 ms 10496 KB Output is correct
5 Correct 7 ms 10496 KB Output is correct
6 Correct 8 ms 10496 KB Output is correct
7 Correct 9 ms 10496 KB Output is correct
8 Correct 9 ms 10496 KB Output is correct
9 Correct 8 ms 10624 KB Output is correct
10 Correct 9 ms 10496 KB Output is correct
11 Correct 7 ms 10496 KB Output is correct
12 Correct 7 ms 10496 KB Output is correct
13 Correct 7 ms 10496 KB Output is correct
14 Correct 8 ms 10496 KB Output is correct
15 Correct 7 ms 10496 KB Output is correct
16 Correct 8 ms 10496 KB Output is correct
17 Correct 7 ms 10496 KB Output is correct
18 Correct 7 ms 10496 KB Output is correct
19 Correct 7 ms 10496 KB Output is correct
20 Correct 7 ms 10496 KB Output is correct
21 Correct 8 ms 10496 KB Output is correct
22 Correct 7 ms 10496 KB Output is correct
23 Correct 8 ms 10496 KB Output is correct
24 Correct 8 ms 10496 KB Output is correct
25 Correct 8 ms 10496 KB Output is correct
26 Correct 7 ms 10496 KB Output is correct
27 Correct 8 ms 10496 KB Output is correct
28 Correct 7 ms 10496 KB Output is correct
29 Correct 7 ms 10496 KB Output is correct
30 Correct 7 ms 10496 KB Output is correct
31 Correct 8 ms 10496 KB Output is correct
32 Correct 9 ms 10496 KB Output is correct
33 Correct 8 ms 10496 KB Output is correct
34 Correct 11 ms 10600 KB Output is correct
35 Correct 145 ms 15960 KB Output is correct
36 Correct 152 ms 18040 KB Output is correct
37 Correct 179 ms 17972 KB Output is correct
38 Correct 186 ms 17912 KB Output is correct
39 Correct 11 ms 10496 KB Output is correct
40 Correct 10 ms 10624 KB Output is correct
41 Correct 10 ms 10624 KB Output is correct
42 Correct 9 ms 10496 KB Output is correct
43 Correct 10 ms 10624 KB Output is correct
44 Correct 11 ms 10624 KB Output is correct
45 Correct 9 ms 10496 KB Output is correct
46 Correct 9 ms 10496 KB Output is correct
47 Correct 10 ms 10624 KB Output is correct
48 Correct 11 ms 10624 KB Output is correct
49 Correct 17 ms 11136 KB Output is correct
50 Correct 151 ms 18168 KB Output is correct
51 Correct 14 ms 10880 KB Output is correct
52 Correct 150 ms 17016 KB Output is correct
53 Correct 16 ms 11136 KB Output is correct
54 Correct 151 ms 17544 KB Output is correct
55 Correct 12 ms 10880 KB Output is correct
56 Correct 12 ms 10880 KB Output is correct
57 Correct 12 ms 10880 KB Output is correct
58 Correct 12 ms 11008 KB Output is correct
59 Correct 11 ms 10496 KB Output is correct
60 Correct 133 ms 15480 KB Output is correct
61 Correct 12 ms 10624 KB Output is correct
62 Correct 175 ms 17784 KB Output is correct
63 Correct 485 ms 43656 KB Output is correct
64 Correct 480 ms 43768 KB Output is correct
65 Correct 460 ms 43640 KB Output is correct
66 Correct 132 ms 14968 KB Output is correct
67 Correct 236 ms 18808 KB Output is correct
68 Correct 124 ms 14968 KB Output is correct
69 Correct 281 ms 19596 KB Output is correct
70 Correct 137 ms 14968 KB Output is correct
71 Correct 143 ms 15008 KB Output is correct
72 Correct 285 ms 18988 KB Output is correct
73 Correct 267 ms 19136 KB Output is correct
74 Correct 793 ms 27444 KB Output is correct
75 Correct 422 ms 23800 KB Output is correct
76 Correct 587 ms 26684 KB Output is correct
77 Correct 568 ms 26764 KB Output is correct
78 Correct 169 ms 18476 KB Output is correct
79 Correct 335 ms 21692 KB Output is correct
80 Correct 166 ms 18424 KB Output is correct
81 Correct 304 ms 21272 KB Output is correct
82 Correct 479 ms 32888 KB Output is correct
83 Correct 506 ms 33040 KB Output is correct
84 Correct 496 ms 33272 KB Output is correct
85 Correct 485 ms 33144 KB Output is correct
86 Correct 145 ms 14200 KB Output is correct
87 Correct 190 ms 15860 KB Output is correct
88 Correct 295 ms 18936 KB Output is correct
89 Correct 624 ms 26232 KB Output is correct