Submission #348411

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
348411	2021-01-15T01:15:21 Z	dennisstar	Parachute rings (IOI12_rings)	C++17	100 / 100	2230 ms	111620 KB

rings

#include <bits/stdc++.h>
using namespace std;

const int MX = 1e6 + 5;

int N, deg[MX], cy, fl;
int dd[4][MX], p[4][MX], chk[4];
vector<int> adj[MX];

int pr[MX], sz[MX];
int gp(int a) { return pr[a]?(pr[a]=gp(pr[a])):a; }
bool un(int a, int b) {
	a=gp(a), b=gp(b);
	if (a!=b) {
		pr[b]=a;
		sz[a]+=sz[b];
	}
	return a!=b;
}

int gp(int a, int *p) { return p[a]?(p[a]=gp(p[a], p)):a; }
bool un(int a, int b, int *p) {
	a=gp(a, p), b=gp(b, p);
	if (a!=b) p[b]=a;
	return a!=b;
}

vector<int> al;
void add(int u, int v) {
	for (int t=0; t<al.size(); t++) {
		int i=al[t];
		if (i==u||i==v) continue;
		if (!un(u, v, p[t])) chk[t]=0;
		dd[t][u]++, dd[t][v]++;
		if (dd[t][u]>=3||dd[t][v]>=3) chk[t]=0;
	}
}
void init(int x) {
	al.emplace_back(x);
	for (auto &i:adj[x]) al.emplace_back(i);
	for (int i=0; i<al.size(); i++) chk[i]=1;
	for (int i=1; i<=N; i++) for (auto &j:adj[i]) if (i<j) add(i, j);
}

void Init(int N) {
	::N=N;
	fill(sz, sz+N+1, 1);
}

void Link(int a, int b) {
	a++; b++;
	deg[a]++; deg[b]++;
	adj[a].emplace_back(b);
	adj[b].emplace_back(a);
	if (!fl&&deg[a]==3) fl=1, init(a);
	else if (!fl&&deg[b]==3) fl=1, init(b);
	else if (!fl) {
		if (!un(a, b)) {
			if (cy) cy=-1;
			else cy=gp(a);
		}
	}
	else add(a, b);
}

int CountCritical() {
	if (cy==-1) return 0;
	else if (!fl) return cy?sz[cy]:N;
	else {
		int c=0;
		for (int i=0; i<al.size(); i++) c+=chk[i];
		return c;
	}
}

Compilation message

rings.cpp: In function 'void add(int, int)':
rings.cpp:30:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |  for (int t=0; t<al.size(); t++) {
      |                ~^~~~~~~~~~
rings.cpp: In function 'void init(int)':
rings.cpp:41:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |  for (int i=0; i<al.size(); i++) chk[i]=1;
      |                ~^~~~~~~~~~
rings.cpp: In function 'int CountCritical()':
rings.cpp:71:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |   for (int i=0; i<al.size(); i++) c+=chk[i];
      |                 ~^~~~~~~~~~

Subtask #1
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	15 ms	23936 KB	Output is correct
2	Correct	17 ms	24300 KB	Output is correct
3	Correct	20 ms	24300 KB	Output is correct
4	Correct	16 ms	23916 KB	Output is correct
5	Correct	16 ms	23936 KB	Output is correct
6	Correct	18 ms	24192 KB	Output is correct
7	Correct	18 ms	24172 KB	Output is correct
8	Correct	17 ms	24044 KB	Output is correct
9	Correct	18 ms	24300 KB	Output is correct
10	Correct	17 ms	24300 KB	Output is correct

Subtask #2
17.0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	476 ms	53408 KB	Output is correct
2	Correct	1263 ms	94236 KB	Output is correct
3	Correct	2230 ms	106976 KB	Output is correct
4	Correct	1151 ms	80492 KB	Output is correct
5	Correct	1184 ms	80524 KB	Output is correct
6	Correct	1128 ms	79044 KB	Output is correct
7	Correct	2106 ms	105860 KB	Output is correct
8	Correct	1537 ms	106348 KB	Output is correct
9	Correct	1655 ms	111620 KB	Output is correct
10	Correct	799 ms	79236 KB	Output is correct

Subtask #3
18.0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	15 ms	23936 KB	Output is correct
2	Correct	17 ms	24300 KB	Output is correct
3	Correct	20 ms	24300 KB	Output is correct
4	Correct	16 ms	23916 KB	Output is correct
5	Correct	16 ms	23936 KB	Output is correct
6	Correct	18 ms	24192 KB	Output is correct
7	Correct	18 ms	24172 KB	Output is correct
8	Correct	17 ms	24044 KB	Output is correct
9	Correct	18 ms	24300 KB	Output is correct
10	Correct	17 ms	24300 KB	Output is correct
11	Correct	18 ms	24300 KB	Output is correct
12	Correct	20 ms	24812 KB	Output is correct
13	Correct	21 ms	24812 KB	Output is correct
14	Correct	19 ms	24556 KB	Output is correct
15	Correct	20 ms	24940 KB	Output is correct
16	Correct	21 ms	24448 KB	Output is correct
17	Correct	20 ms	24812 KB	Output is correct
18	Correct	21 ms	25324 KB	Output is correct
19	Correct	20 ms	24428 KB	Output is correct
20	Correct	20 ms	24812 KB	Output is correct

Subtask #4
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	15 ms	23936 KB	Output is correct
2	Correct	17 ms	24300 KB	Output is correct
3	Correct	20 ms	24300 KB	Output is correct
4	Correct	16 ms	23916 KB	Output is correct
5	Correct	16 ms	23936 KB	Output is correct
6	Correct	18 ms	24192 KB	Output is correct
7	Correct	18 ms	24172 KB	Output is correct
8	Correct	17 ms	24044 KB	Output is correct
9	Correct	18 ms	24300 KB	Output is correct
10	Correct	17 ms	24300 KB	Output is correct
11	Correct	18 ms	24300 KB	Output is correct
12	Correct	20 ms	24812 KB	Output is correct
13	Correct	21 ms	24812 KB	Output is correct
14	Correct	19 ms	24556 KB	Output is correct
15	Correct	20 ms	24940 KB	Output is correct
16	Correct	21 ms	24448 KB	Output is correct
17	Correct	20 ms	24812 KB	Output is correct
18	Correct	21 ms	25324 KB	Output is correct
19	Correct	20 ms	24428 KB	Output is correct
20	Correct	20 ms	24812 KB	Output is correct
21	Correct	33 ms	25836 KB	Output is correct
22	Correct	46 ms	26988 KB	Output is correct
23	Correct	58 ms	28012 KB	Output is correct
24	Correct	82 ms	29932 KB	Output is correct
25	Correct	34 ms	28396 KB	Output is correct
26	Correct	70 ms	31084 KB	Output is correct
27	Correct	64 ms	28780 KB	Output is correct
28	Correct	78 ms	31596 KB	Output is correct
29	Correct	60 ms	30444 KB	Output is correct
30	Correct	83 ms	29548 KB	Output is correct

Subtask #5
31.0 / 31.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	15 ms	23936 KB	Output is correct
2	Correct	17 ms	24300 KB	Output is correct
3	Correct	20 ms	24300 KB	Output is correct
4	Correct	16 ms	23916 KB	Output is correct
5	Correct	16 ms	23936 KB	Output is correct
6	Correct	18 ms	24192 KB	Output is correct
7	Correct	18 ms	24172 KB	Output is correct
8	Correct	17 ms	24044 KB	Output is correct
9	Correct	18 ms	24300 KB	Output is correct
10	Correct	17 ms	24300 KB	Output is correct
11	Correct	476 ms	53408 KB	Output is correct
12	Correct	1263 ms	94236 KB	Output is correct
13	Correct	2230 ms	106976 KB	Output is correct
14	Correct	1151 ms	80492 KB	Output is correct
15	Correct	1184 ms	80524 KB	Output is correct
16	Correct	1128 ms	79044 KB	Output is correct
17	Correct	2106 ms	105860 KB	Output is correct
18	Correct	1537 ms	106348 KB	Output is correct
19	Correct	1655 ms	111620 KB	Output is correct
20	Correct	799 ms	79236 KB	Output is correct
21	Correct	18 ms	24300 KB	Output is correct
22	Correct	20 ms	24812 KB	Output is correct
23	Correct	21 ms	24812 KB	Output is correct
24	Correct	19 ms	24556 KB	Output is correct
25	Correct	20 ms	24940 KB	Output is correct
26	Correct	21 ms	24448 KB	Output is correct
27	Correct	20 ms	24812 KB	Output is correct
28	Correct	21 ms	25324 KB	Output is correct
29	Correct	20 ms	24428 KB	Output is correct
30	Correct	20 ms	24812 KB	Output is correct
31	Correct	33 ms	25836 KB	Output is correct
32	Correct	46 ms	26988 KB	Output is correct
33	Correct	58 ms	28012 KB	Output is correct
34	Correct	82 ms	29932 KB	Output is correct
35	Correct	34 ms	28396 KB	Output is correct
36	Correct	70 ms	31084 KB	Output is correct
37	Correct	64 ms	28780 KB	Output is correct
38	Correct	78 ms	31596 KB	Output is correct
39	Correct	60 ms	30444 KB	Output is correct
40	Correct	83 ms	29548 KB	Output is correct
41	Correct	241 ms	41900 KB	Output is correct
42	Correct	738 ms	82976 KB	Output is correct
43	Correct	324 ms	67564 KB	Output is correct
44	Correct	1034 ms	103756 KB	Output is correct
45	Correct	1394 ms	96944 KB	Output is correct
46	Correct	745 ms	71660 KB	Output is correct
47	Correct	980 ms	72672 KB	Output is correct
48	Correct	648 ms	89868 KB	Output is correct
49	Correct	726 ms	71788 KB	Output is correct
50	Correct	772 ms	71276 KB	Output is correct
51	Correct	367 ms	65644 KB	Output is correct
52	Correct	939 ms	88812 KB	Output is correct
53	Correct	661 ms	89940 KB	Output is correct
54	Correct	1313 ms	95724 KB	Output is correct
55	Correct	1373 ms	101612 KB	Output is correct

Submission #348411

Compilation message

Subtask #1 20.0 / 20.0

Subtask #2 17.0 / 17.0

Subtask #3 18.0 / 18.0

Subtask #4 14.0 / 14.0

Subtask #5 31.0 / 31.0

Subtask #1
20.0 / 20.0

Subtask #2
17.0 / 17.0

Subtask #3
18.0 / 18.0

Subtask #4
14.0 / 14.0

Subtask #5
31.0 / 31.0