oj.uz

Submission #269474

# Submission time Handle Problem Language Result Execution time Memory
269474 2020-08-17T07:16:55 Z gs14004 Making Friends on Joitter is Fun (JOI20_joitter2) C++17
100 / 100
 3227 ms 59692 KB 
#include <bits/stdc++.h>
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(), (v).end()
using namespace std;
using lint = long long;
using pi = pair<int, int>;
const int MAXN = 300005;
const int mod = 1e9 + 7;

int n, m;
pi a[MAXN], b[MAXN];
set<pi> sa, sb;

lint InSaYEnd[MAXN];
int pa[MAXN];

vector<int> memb[MAXN], inc[MAXN];
int f(int x){ return sz(memb[x]) + sz(inc[x]); }

queue<pi> que;
lint dap;

void uni(int x, int y){
	x = pa[x]; y = pa[y];
	if(x == y) return;
	if(f(x) < f(y)) swap(x, y);
	dap += 2ll * sz(memb[x]) * sz(memb[y]);
	dap -= sz(memb[y]) * InSaYEnd[y];
	dap -= sz(memb[x]) * InSaYEnd[x];
	for(auto &i : memb[y]){
		memb[x].push_back(i);
		pa[i] = x;
	}
	for(auto &i : inc[y]){
		if(sa.count(a[i])){
			if(a[i].second != x && a[i].second != y) dap -= sz(memb[a[i].second]);
			InSaYEnd[a[i].second]--;
			sa.erase(a[i]);
		}
		sb.erase(b[i]);
		a[i] = pi(a[i].first, pa[a[i].second]);
		b[i] = pi(pa[a[i].first], pa[a[i].second]);
		if(pa[a[i].first] != pa[a[i].second] && !sa.count(a[i])){
			if(a[i].second != x) dap += sz(memb[pa[a[i].second]]);
			InSaYEnd[a[i].second]++;
			sa.insert(a[i]);
		}
		sb.insert(b[i]);
		if(sb.find(pi(b[i].second, b[i].first)) != sb.end()) que.push(b[i]);
		inc[x].push_back(i);
	}
	dap += InSaYEnd[x] * sz(memb[x]);
	inc[y].clear();
	memb[y].clear();
}

int main(){
	scanf("%d %d",&n,&m);
	for(int i=0; i<n; i++){
		memb[i].push_back(i);
		pa[i] = i;
	}
	for(int i=0; i<m; i++){
		int x, y; scanf("%d %d",&x,&y);
		x--; y--;
		a[i] = pi(x, pa[y]);
		b[i] = pi(pa[x], pa[y]);
		if(pa[x] != pa[y]){
			inc[pa[x]].push_back(i);
			inc[pa[y]].push_back(i);
			if(!sa.count(pi(x, pa[y]))){
				dap += sz(memb[pa[y]]);
				InSaYEnd[pa[y]]++;
				sa.emplace(x, pa[y]);
			}
			sb.emplace(pa[x], pa[y]);
			if(sb.count(pi(pa[y], pa[x]))){
				que.emplace(x, y);
			}
		}
		while(sz(que)){
			int x, y;
			tie(x, y) = que.front(); que.pop();
			uni(x, y);
		}
		printf("%lld\n", dap);
	}
}

Compilation message

joitter2.cpp: In function 'int main()':
joitter2.cpp:58:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   58 |  scanf("%d %d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~
joitter2.cpp:64:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   64 |   int x, y; scanf("%d %d",&x,&y);
      |             ~~~~~^~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 10 ms 14464 KB Output is correct
3 Correct 11 ms 14464 KB Output is correct
4 Correct 10 ms 14464 KB Output is correct
5 Correct 10 ms 14464 KB Output is correct
6 Correct 10 ms 14464 KB Output is correct
7 Correct 11 ms 14464 KB Output is correct
8 Correct 11 ms 14464 KB Output is correct
9 Correct 12 ms 14464 KB Output is correct
10 Correct 11 ms 14464 KB Output is correct
11 Correct 11 ms 14464 KB Output is correct
12 Correct 11 ms 14464 KB Output is correct
13 Correct 12 ms 14464 KB Output is correct
14 Correct 14 ms 14464 KB Output is correct
15 Correct 16 ms 14464 KB Output is correct
16 Correct 11 ms 14464 KB Output is correct
17 Correct 12 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 12 ms 14464 KB Output is correct
20 Correct 12 ms 14464 KB Output is correct
21 Correct 13 ms 14464 KB Output is correct
22 Correct 13 ms 14464 KB Output is correct
23 Correct 13 ms 14464 KB Output is correct
24 Correct 11 ms 14464 KB Output is correct
25 Correct 11 ms 14464 KB Output is correct
26 Correct 12 ms 14464 KB Output is correct
27 Correct 10 ms 14464 KB Output is correct
28 Correct 12 ms 14464 KB Output is correct
29 Correct 10 ms 14464 KB Output is correct
30 Correct 11 ms 14464 KB Output is correct
31 Correct 13 ms 14464 KB Output is correct
32 Correct 12 ms 14464 KB Output is correct
33 Correct 13 ms 14464 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 10 ms 14464 KB Output is correct
3 Correct 11 ms 14464 KB Output is correct
4 Correct 10 ms 14464 KB Output is correct
5 Correct 10 ms 14464 KB Output is correct
6 Correct 10 ms 14464 KB Output is correct
7 Correct 11 ms 14464 KB Output is correct
8 Correct 11 ms 14464 KB Output is correct
9 Correct 12 ms 14464 KB Output is correct
10 Correct 11 ms 14464 KB Output is correct
11 Correct 11 ms 14464 KB Output is correct
12 Correct 11 ms 14464 KB Output is correct
13 Correct 12 ms 14464 KB Output is correct
14 Correct 14 ms 14464 KB Output is correct
15 Correct 16 ms 14464 KB Output is correct
16 Correct 11 ms 14464 KB Output is correct
17 Correct 12 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 12 ms 14464 KB Output is correct
20 Correct 12 ms 14464 KB Output is correct
21 Correct 13 ms 14464 KB Output is correct
22 Correct 13 ms 14464 KB Output is correct
23 Correct 13 ms 14464 KB Output is correct
24 Correct 11 ms 14464 KB Output is correct
25 Correct 11 ms 14464 KB Output is correct
26 Correct 12 ms 14464 KB Output is correct
27 Correct 10 ms 14464 KB Output is correct
28 Correct 12 ms 14464 KB Output is correct
29 Correct 10 ms 14464 KB Output is correct
30 Correct 11 ms 14464 KB Output is correct
31 Correct 13 ms 14464 KB Output is correct
32 Correct 12 ms 14464 KB Output is correct
33 Correct 13 ms 14464 KB Output is correct
34 Correct 15 ms 14720 KB Output is correct
35 Correct 162 ms 22524 KB Output is correct
36 Correct 231 ms 24564 KB Output is correct
37 Correct 220 ms 24688 KB Output is correct
38 Correct 214 ms 24312 KB Output is correct
39 Correct 13 ms 14720 KB Output is correct
40 Correct 28 ms 14968 KB Output is correct
41 Correct 29 ms 14976 KB Output is correct
42 Correct 14 ms 14720 KB Output is correct
43 Correct 16 ms 14848 KB Output is correct
44 Correct 20 ms 14848 KB Output is correct
45 Correct 13 ms 14720 KB Output is correct
46 Correct 16 ms 14720 KB Output is correct
47 Correct 22 ms 14840 KB Output is correct
48 Correct 22 ms 14848 KB Output is correct
49 Correct 39 ms 15480 KB Output is correct
50 Correct 238 ms 24564 KB Output is correct
51 Correct 24 ms 15104 KB Output is correct
52 Correct 185 ms 23248 KB Output is correct
53 Correct 41 ms 15480 KB Output is correct
54 Correct 177 ms 23924 KB Output is correct
55 Correct 25 ms 15104 KB Output is correct
56 Correct 22 ms 15104 KB Output is correct
57 Correct 22 ms 15104 KB Output is correct
58 Correct 23 ms 15104 KB Output is correct
59 Correct 21 ms 14976 KB Output is correct
60 Correct 139 ms 22028 KB Output is correct
61 Correct 22 ms 14976 KB Output is correct
62 Correct 198 ms 24112 KB Output is correct

Subtask #3
83.0 / 83.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 14464 KB Output is correct
2 Correct 10 ms 14464 KB Output is correct
3 Correct 11 ms 14464 KB Output is correct
4 Correct 10 ms 14464 KB Output is correct
5 Correct 10 ms 14464 KB Output is correct
6 Correct 10 ms 14464 KB Output is correct
7 Correct 11 ms 14464 KB Output is correct
8 Correct 11 ms 14464 KB Output is correct
9 Correct 12 ms 14464 KB Output is correct
10 Correct 11 ms 14464 KB Output is correct
11 Correct 11 ms 14464 KB Output is correct
12 Correct 11 ms 14464 KB Output is correct
13 Correct 12 ms 14464 KB Output is correct
14 Correct 14 ms 14464 KB Output is correct
15 Correct 16 ms 14464 KB Output is correct
16 Correct 11 ms 14464 KB Output is correct
17 Correct 12 ms 14464 KB Output is correct
18 Correct 13 ms 14464 KB Output is correct
19 Correct 12 ms 14464 KB Output is correct
20 Correct 12 ms 14464 KB Output is correct
21 Correct 13 ms 14464 KB Output is correct
22 Correct 13 ms 14464 KB Output is correct
23 Correct 13 ms 14464 KB Output is correct
24 Correct 11 ms 14464 KB Output is correct
25 Correct 11 ms 14464 KB Output is correct
26 Correct 12 ms 14464 KB Output is correct
27 Correct 10 ms 14464 KB Output is correct
28 Correct 12 ms 14464 KB Output is correct
29 Correct 10 ms 14464 KB Output is correct
30 Correct 11 ms 14464 KB Output is correct
31 Correct 13 ms 14464 KB Output is correct
32 Correct 12 ms 14464 KB Output is correct
33 Correct 13 ms 14464 KB Output is correct
34 Correct 15 ms 14720 KB Output is correct
35 Correct 162 ms 22524 KB Output is correct
36 Correct 231 ms 24564 KB Output is correct
37 Correct 220 ms 24688 KB Output is correct
38 Correct 214 ms 24312 KB Output is correct
39 Correct 13 ms 14720 KB Output is correct
40 Correct 28 ms 14968 KB Output is correct
41 Correct 29 ms 14976 KB Output is correct
42 Correct 14 ms 14720 KB Output is correct
43 Correct 16 ms 14848 KB Output is correct
44 Correct 20 ms 14848 KB Output is correct
45 Correct 13 ms 14720 KB Output is correct
46 Correct 16 ms 14720 KB Output is correct
47 Correct 22 ms 14840 KB Output is correct
48 Correct 22 ms 14848 KB Output is correct
49 Correct 39 ms 15480 KB Output is correct
50 Correct 238 ms 24564 KB Output is correct
51 Correct 24 ms 15104 KB Output is correct
52 Correct 185 ms 23248 KB Output is correct
53 Correct 41 ms 15480 KB Output is correct
54 Correct 177 ms 23924 KB Output is correct
55 Correct 25 ms 15104 KB Output is correct
56 Correct 22 ms 15104 KB Output is correct
57 Correct 22 ms 15104 KB Output is correct
58 Correct 23 ms 15104 KB Output is correct
59 Correct 21 ms 14976 KB Output is correct
60 Correct 139 ms 22028 KB Output is correct
61 Correct 22 ms 14976 KB Output is correct
62 Correct 198 ms 24112 KB Output is correct
63 Correct 1105 ms 59600 KB Output is correct
64 Correct 1080 ms 59612 KB Output is correct
65 Correct 1141 ms 59692 KB Output is correct
66 Correct 230 ms 29288 KB Output is correct
67 Correct 1932 ms 48088 KB Output is correct
68 Correct 249 ms 29220 KB Output is correct
69 Correct 765 ms 33492 KB Output is correct
70 Correct 267 ms 29220 KB Output is correct
71 Correct 270 ms 29124 KB Output is correct
72 Correct 1615 ms 37808 KB Output is correct
73 Correct 1597 ms 39276 KB Output is correct
74 Correct 3227 ms 53244 KB Output is correct
75 Correct 1157 ms 39072 KB Output is correct
76 Correct 2124 ms 45464 KB Output is correct
77 Correct 2256 ms 45672 KB Output is correct
78 Correct 482 ms 31652 KB Output is correct
79 Correct 763 ms 36592 KB Output is correct
80 Correct 386 ms 31684 KB Output is correct
81 Correct 776 ms 36620 KB Output is correct
82 Correct 1768 ms 48328 KB Output is correct
83 Correct 2243 ms 48312 KB Output is correct
84 Correct 1727 ms 48048 KB Output is correct
85 Correct 1421 ms 48140 KB Output is correct
86 Correct 1215 ms 50460 KB Output is correct
87 Correct 1186 ms 52744 KB Output is correct
88 Correct 1655 ms 38276 KB Output is correct
89 Correct 2029 ms 44688 KB Output is correct