oj.uz

Submission #769678

# Submission time Handle Problem Language Result Execution time Memory
769678 2023-06-30T02:38:40 Z minhcool Making Friends on Joitter is Fun (JOI20_joitter2) C++17
100 / 100
 2005 ms 364240 KB 
#define local
#ifndef local
#include ""
#endif
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
 
#define int long long
#define fi first
#define se second
#define pb push_back
#define mp make_pair
 
typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;
 
const int N = 1e6 + 5;
 
const int oo = 1e18 + 7, mod = 1e9 + 7;
 
mt19937 rng(1);
 
int rnd(int l, int r){
	int temp = rng() % (r - l + 1);
	return abs(temp) + l;
}
 
int n, m;
set<ii> edges;
 
unordered_set<int> to[N], from[N];// to includes all nodes that are inside to
unordered_set<int> tocomp[N], fromcomp[N];
int rt[N], sz[N];
 
int answer;
 
int root(int x){
    return (x == rt[x] ? x : rt[x] = root(rt[x]));
}

queue<ii> q;
 
void merge(int x, int y){
    x = root(x), y = root(y);
    if(x == y) return;
  //  cout << x << " " << y << "\n";
    if(sz[x] < sz[y]) swap(x, y);
    answer -= sz[x] * (to[x].size() - sz[x]);
    answer -= (sz[x] * (sz[x] - 1));
    answer -= sz[y] * (to[y].size() - sz[y]);
    answer -= (sz[y] * (sz[y] - 1));
    rt[y] = x;
    sz[x] += sz[y];
    //for(auto it : to[y]) to[x].insert(it);
    for(auto it : from[y]) from[x].insert(it);
    for(auto it : to[y]) to[x].insert(it);
    for(auto it : fromcomp[y]){
        fromcomp[x].insert(it);
        tocomp[it].insert(x);
    }
    for(auto it : tocomp[y]){
        tocomp[x].insert(it);
        fromcomp[it].insert(x);
    }
    for(auto it : tocomp[y]){
        //cout << it << "\n";
        if(tocomp[it].find(x) != tocomp[it].end()) q.push({x, it});
    }
    for(auto it : fromcomp[y]){
        //cout << it << "\n";
        if(fromcomp[it].find(x) != fromcomp[it].end()) q.push({x, it});
    }
    //for(auto it : tocomp[x]) cout << it << " ";
    //cout << "\n";
    //for(auto it : fromcomp[x]) cout << it << " ";
    //cout << "\n";
    //for(auto it : tocomp[5]) cout << it << " ";
    //cout <<"\n";
    from[y].clear();
    to[y].clear();
    tocomp[y].clear();
    fromcomp[y].clear();
    answer += sz[x] * (to[x].size() - sz[x]);
    answer += sz[x] * (sz[x] - 1);
}
 
#ifdef local
void process(){
	cin >> n >> m;
	for(int i = 1; i <= n; i++){
	    rt[i] = i, sz[i] = 1, to[i].insert(i), from[i].insert(i), tocomp[i].insert(i), fromcomp[i].insert(i);
	}
	for(int i = 1; i <= m; i++){
	    int x, y;
	    cin >> x >> y;
	    int xx = root(x), yy = root(y);
	    if(xx != yy){
	        if(to[yy].find(x) == to[yy].end()){
	            to[yy].insert(x);
	            answer += sz[yy];
	        }
	        from[xx].insert(y);
	        fromcomp[xx].insert(yy);
	        tocomp[yy].insert(xx);
	        if(fromcomp[yy].find(xx) != fromcomp[yy].end()) q.push({xx, yy});
	    }
	    while(!q.empty()){
	        merge(q.front().fi, q.front().se);
	        q.pop();
	    }
	    //edges.insert({x, yy});
	    cout << answer << "\n";
	}
}
 
signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	process();
}
#endif

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 219412 KB Output is correct
2 Correct 96 ms 219468 KB Output is correct
3 Correct 96 ms 219468 KB Output is correct
4 Correct 97 ms 219496 KB Output is correct
5 Correct 96 ms 219416 KB Output is correct
6 Correct 102 ms 219544 KB Output is correct
7 Correct 106 ms 219588 KB Output is correct
8 Correct 105 ms 219620 KB Output is correct
9 Correct 97 ms 219540 KB Output is correct
10 Correct 95 ms 219456 KB Output is correct
11 Correct 99 ms 219660 KB Output is correct
12 Correct 96 ms 219496 KB Output is correct
13 Correct 96 ms 219496 KB Output is correct
14 Correct 113 ms 219492 KB Output is correct
15 Correct 94 ms 219468 KB Output is correct
16 Correct 102 ms 219620 KB Output is correct
17 Correct 94 ms 219544 KB Output is correct
18 Correct 96 ms 219548 KB Output is correct
19 Correct 96 ms 219536 KB Output is correct
20 Correct 95 ms 219532 KB Output is correct
21 Correct 95 ms 219532 KB Output is correct
22 Correct 97 ms 219532 KB Output is correct
23 Correct 102 ms 219512 KB Output is correct
24 Correct 96 ms 219520 KB Output is correct
25 Correct 95 ms 219540 KB Output is correct
26 Correct 96 ms 219452 KB Output is correct
27 Correct 97 ms 219544 KB Output is correct
28 Correct 97 ms 219552 KB Output is correct
29 Correct 98 ms 219468 KB Output is correct
30 Correct 95 ms 219496 KB Output is correct
31 Correct 97 ms 219544 KB Output is correct
32 Correct 95 ms 219424 KB Output is correct
33 Correct 96 ms 219468 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 219412 KB Output is correct
2 Correct 96 ms 219468 KB Output is correct
3 Correct 96 ms 219468 KB Output is correct
4 Correct 97 ms 219496 KB Output is correct
5 Correct 96 ms 219416 KB Output is correct
6 Correct 102 ms 219544 KB Output is correct
7 Correct 106 ms 219588 KB Output is correct
8 Correct 105 ms 219620 KB Output is correct
9 Correct 97 ms 219540 KB Output is correct
10 Correct 95 ms 219456 KB Output is correct
11 Correct 99 ms 219660 KB Output is correct
12 Correct 96 ms 219496 KB Output is correct
13 Correct 96 ms 219496 KB Output is correct
14 Correct 113 ms 219492 KB Output is correct
15 Correct 94 ms 219468 KB Output is correct
16 Correct 102 ms 219620 KB Output is correct
17 Correct 94 ms 219544 KB Output is correct
18 Correct 96 ms 219548 KB Output is correct
19 Correct 96 ms 219536 KB Output is correct
20 Correct 95 ms 219532 KB Output is correct
21 Correct 95 ms 219532 KB Output is correct
22 Correct 97 ms 219532 KB Output is correct
23 Correct 102 ms 219512 KB Output is correct
24 Correct 96 ms 219520 KB Output is correct
25 Correct 95 ms 219540 KB Output is correct
26 Correct 96 ms 219452 KB Output is correct
27 Correct 97 ms 219544 KB Output is correct
28 Correct 97 ms 219552 KB Output is correct
29 Correct 98 ms 219468 KB Output is correct
30 Correct 95 ms 219496 KB Output is correct
31 Correct 97 ms 219544 KB Output is correct
32 Correct 95 ms 219424 KB Output is correct
33 Correct 96 ms 219468 KB Output is correct
34 Correct 96 ms 219724 KB Output is correct
35 Correct 159 ms 226060 KB Output is correct
36 Correct 199 ms 229676 KB Output is correct
37 Correct 165 ms 229852 KB Output is correct
38 Correct 172 ms 229340 KB Output is correct
39 Correct 98 ms 220816 KB Output is correct
40 Correct 104 ms 221516 KB Output is correct
41 Correct 114 ms 221468 KB Output is correct
42 Correct 104 ms 220848 KB Output is correct
43 Correct 100 ms 220876 KB Output is correct
44 Correct 99 ms 220884 KB Output is correct
45 Correct 99 ms 220836 KB Output is correct
46 Correct 100 ms 220784 KB Output is correct
47 Correct 102 ms 221064 KB Output is correct
48 Correct 102 ms 221016 KB Output is correct
49 Correct 108 ms 221828 KB Output is correct
50 Correct 171 ms 229940 KB Output is correct
51 Correct 105 ms 221248 KB Output is correct
52 Correct 162 ms 227616 KB Output is correct
53 Correct 122 ms 221624 KB Output is correct
54 Correct 168 ms 228668 KB Output is correct
55 Correct 100 ms 221260 KB Output is correct
56 Correct 102 ms 221340 KB Output is correct
57 Correct 102 ms 221260 KB Output is correct
58 Correct 101 ms 221324 KB Output is correct
59 Correct 105 ms 221772 KB Output is correct
60 Correct 158 ms 226716 KB Output is correct
61 Correct 105 ms 221100 KB Output is correct
62 Correct 172 ms 229236 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 219412 KB Output is correct
2 Correct 96 ms 219468 KB Output is correct
3 Correct 96 ms 219468 KB Output is correct
4 Correct 97 ms 219496 KB Output is correct
5 Correct 96 ms 219416 KB Output is correct
6 Correct 102 ms 219544 KB Output is correct
7 Correct 106 ms 219588 KB Output is correct
8 Correct 105 ms 219620 KB Output is correct
9 Correct 97 ms 219540 KB Output is correct
10 Correct 95 ms 219456 KB Output is correct
11 Correct 99 ms 219660 KB Output is correct
12 Correct 96 ms 219496 KB Output is correct
13 Correct 96 ms 219496 KB Output is correct
14 Correct 113 ms 219492 KB Output is correct
15 Correct 94 ms 219468 KB Output is correct
16 Correct 102 ms 219620 KB Output is correct
17 Correct 94 ms 219544 KB Output is correct
18 Correct 96 ms 219548 KB Output is correct
19 Correct 96 ms 219536 KB Output is correct
20 Correct 95 ms 219532 KB Output is correct
21 Correct 95 ms 219532 KB Output is correct
22 Correct 97 ms 219532 KB Output is correct
23 Correct 102 ms 219512 KB Output is correct
24 Correct 96 ms 219520 KB Output is correct
25 Correct 95 ms 219540 KB Output is correct
26 Correct 96 ms 219452 KB Output is correct
27 Correct 97 ms 219544 KB Output is correct
28 Correct 97 ms 219552 KB Output is correct
29 Correct 98 ms 219468 KB Output is correct
30 Correct 95 ms 219496 KB Output is correct
31 Correct 97 ms 219544 KB Output is correct
32 Correct 95 ms 219424 KB Output is correct
33 Correct 96 ms 219468 KB Output is correct
34 Correct 96 ms 219724 KB Output is correct
35 Correct 159 ms 226060 KB Output is correct
36 Correct 199 ms 229676 KB Output is correct
37 Correct 165 ms 229852 KB Output is correct
38 Correct 172 ms 229340 KB Output is correct
39 Correct 98 ms 220816 KB Output is correct
40 Correct 104 ms 221516 KB Output is correct
41 Correct 114 ms 221468 KB Output is correct
42 Correct 104 ms 220848 KB Output is correct
43 Correct 100 ms 220876 KB Output is correct
44 Correct 99 ms 220884 KB Output is correct
45 Correct 99 ms 220836 KB Output is correct
46 Correct 100 ms 220784 KB Output is correct
47 Correct 102 ms 221064 KB Output is correct
48 Correct 102 ms 221016 KB Output is correct
49 Correct 108 ms 221828 KB Output is correct
50 Correct 171 ms 229940 KB Output is correct
51 Correct 105 ms 221248 KB Output is correct
52 Correct 162 ms 227616 KB Output is correct
53 Correct 122 ms 221624 KB Output is correct
54 Correct 168 ms 228668 KB Output is correct
55 Correct 100 ms 221260 KB Output is correct
56 Correct 102 ms 221340 KB Output is correct
57 Correct 102 ms 221260 KB Output is correct
58 Correct 101 ms 221324 KB Output is correct
59 Correct 105 ms 221772 KB Output is correct
60 Correct 158 ms 226716 KB Output is correct
61 Correct 105 ms 221100 KB Output is correct
62 Correct 172 ms 229236 KB Output is correct
63 Correct 835 ms 320460 KB Output is correct
64 Correct 811 ms 320468 KB Output is correct
65 Correct 817 ms 320464 KB Output is correct
66 Correct 479 ms 287588 KB Output is correct
67 Correct 1935 ms 341936 KB Output is correct
68 Correct 449 ms 287516 KB Output is correct
69 Correct 523 ms 293680 KB Output is correct
70 Correct 471 ms 287580 KB Output is correct
71 Correct 526 ms 287572 KB Output is correct
72 Correct 1200 ms 303396 KB Output is correct
73 Correct 1266 ms 308472 KB Output is correct
74 Correct 1712 ms 332140 KB Output is correct
75 Correct 694 ms 299472 KB Output is correct
76 Correct 1185 ms 309768 KB Output is correct
77 Correct 1185 ms 310044 KB Output is correct
78 Correct 445 ms 292244 KB Output is correct
79 Correct 534 ms 298100 KB Output is correct
80 Correct 423 ms 292264 KB Output is correct
81 Correct 521 ms 298320 KB Output is correct
82 Correct 993 ms 313140 KB Output is correct
83 Correct 949 ms 313100 KB Output is correct
84 Correct 782 ms 312316 KB Output is correct
85 Correct 816 ms 312268 KB Output is correct
86 Correct 2005 ms 361948 KB Output is correct
87 Correct 1993 ms 364240 KB Output is correct
88 Correct 1218 ms 305972 KB Output is correct
89 Correct 1117 ms 307392 KB Output is correct