Submission #62427

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
62427	2018-07-28T12:46:33 Z	zadrga	Parachute rings (IOI12_rings)	C++14	55 / 100	4000 ms	111980 KB

rings

// 14.02

#include <bits/stdc++.h>

using namespace std;

#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF (1LL << 55)
#define MOD (1000 * 1000 * 1000 + 7)
#define maxn 1000111

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
 
int n, cnt;
int deg[maxn], dep[maxn];
bool edge[maxn], found;

vector<int> cycles;
vector<pii> adj[maxn];

void Init(int N) {
	n = N;
	for(int i = 0; i < maxn; i++){
		deg[i] = 0;
		adj[i].clear();
	}
}

void Link(int A, int B){
	deg[A]++;
	deg[B]++;
	adj[A].pb(mp(B, ++cnt));
	adj[B].pb(mp(A, cnt));

//	cout << "ok link" << endl; 
}

void DFS(int x, int p){
	if(found)
		return;

	for(pii v : adj[x]){
		if(found || v.fi == p || edge[v.se])
			continue;	

		if(dep[v.fi]){
			cycles.pb(dep[x] - dep[v.fi] + 1);
			found = 1;
		}

		if(!dep[v.fi]){
			dep[v.fi] = dep[x] + 1;
			DFS(v.fi, x);
		}
	}
}

void checkCycles(){
	cycles.clear();
	memset(dep, 0, sizeof(dep));

	for(int i = 0; i < n; i++){
		if(cycles.size() >= 2)
			return;

		if(!dep[i]){
			found = 0;
			dep[i] = 1;
			DFS(i, -1);
		}
	}

}

bool check(int x){
	for(pii v : adj[x]){
		edge[v.se] = 1;
		deg[v.fi]--;
	}

	bool ret = 1;
	for(int i = 0; i < n; i++){
		if(i != x && deg[i] > 2)
			ret = 0;
	}

	checkCycles();

	ret &= (cycles.size() == 0);

	for(pii v : adj[x]){
		edge[v.se] = 0;
		deg[v.fi]++;
	}

	return ret;
}

int CountCritical(){

//	cout << "ok count" << endl; 

	vector<int> v[5];
	int max_degree = 0;
	for(int i = 0; i < n; i++){
		int cur = min(deg[i], 4);
		max_degree = max(max_degree, cur);
		v[cur].pb(i);
	}

	if(max_degree <= 1)
		return n;

	if(max_degree == 2){
		checkCycles();
		if(cycles.size() > 1)
			return 0;

		if(cycles.size() == 1)
			return cycles[0];

		return n;
	}

	if(max_degree == 3){
		int ans = check(v[3][0]);
		for(pii x : adj[v[3][0]])
			ans += check(x.fi);

		return ans;
	}

	if(max_degree == 4){
		if(v[4].size() > 1)
			return 0;

		int ans = check(v[4][0]);
		return ans;
	}
}

Compilation message

rings.cpp: In function 'int CountCritical()':
rings.cpp:145:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	31608 KB	Output is correct
2	Correct	36 ms	31860 KB	Output is correct
3	Correct	34 ms	31896 KB	Output is correct
4	Correct	31 ms	31896 KB	Output is correct
5	Correct	33 ms	32068 KB	Output is correct
6	Correct	33 ms	32416 KB	Output is correct
7	Correct	32 ms	32416 KB	Output is correct
8	Correct	33 ms	32416 KB	Output is correct
9	Correct	35 ms	32416 KB	Output is correct
10	Correct	36 ms	32416 KB	Output is correct

Subtask #2
17.0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	528 ms	50596 KB	Output is correct
2	Correct	1058 ms	60776 KB	Output is correct
3	Correct	983 ms	66420 KB	Output is correct
4	Correct	1280 ms	68036 KB	Output is correct
5	Correct	1291 ms	69220 KB	Output is correct
6	Correct	1338 ms	111980 KB	Output is correct
7	Correct	965 ms	111980 KB	Output is correct
8	Correct	2013 ms	111980 KB	Output is correct
9	Correct	2111 ms	111980 KB	Output is correct
10	Correct	783 ms	111980 KB	Output is correct

Subtask #3
18.0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	31608 KB	Output is correct
2	Correct	36 ms	31860 KB	Output is correct
3	Correct	34 ms	31896 KB	Output is correct
4	Correct	31 ms	31896 KB	Output is correct
5	Correct	33 ms	32068 KB	Output is correct
6	Correct	33 ms	32416 KB	Output is correct
7	Correct	32 ms	32416 KB	Output is correct
8	Correct	33 ms	32416 KB	Output is correct
9	Correct	35 ms	32416 KB	Output is correct
10	Correct	36 ms	32416 KB	Output is correct
11	Correct	81 ms	111980 KB	Output is correct
12	Correct	105 ms	111980 KB	Output is correct
13	Correct	145 ms	111980 KB	Output is correct
14	Correct	74 ms	111980 KB	Output is correct
15	Correct	96 ms	111980 KB	Output is correct
16	Correct	88 ms	111980 KB	Output is correct
17	Correct	127 ms	111980 KB	Output is correct
18	Correct	67 ms	111980 KB	Output is correct
19	Correct	91 ms	111980 KB	Output is correct
20	Correct	160 ms	111980 KB	Output is correct

Subtask #4
0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	31608 KB	Output is correct
2	Correct	36 ms	31860 KB	Output is correct
3	Correct	34 ms	31896 KB	Output is correct
4	Correct	31 ms	31896 KB	Output is correct
5	Correct	33 ms	32068 KB	Output is correct
6	Correct	33 ms	32416 KB	Output is correct
7	Correct	32 ms	32416 KB	Output is correct
8	Correct	33 ms	32416 KB	Output is correct
9	Correct	35 ms	32416 KB	Output is correct
10	Correct	36 ms	32416 KB	Output is correct
11	Correct	81 ms	111980 KB	Output is correct
12	Correct	105 ms	111980 KB	Output is correct
13	Correct	145 ms	111980 KB	Output is correct
14	Correct	74 ms	111980 KB	Output is correct
15	Correct	96 ms	111980 KB	Output is correct
16	Correct	88 ms	111980 KB	Output is correct
17	Correct	127 ms	111980 KB	Output is correct
18	Correct	67 ms	111980 KB	Output is correct
19	Correct	91 ms	111980 KB	Output is correct
20	Correct	160 ms	111980 KB	Output is correct
21	Execution timed out	4037 ms	111980 KB	Time limit exceeded
22	Halted	0 ms	0 KB	-

Subtask #5
0 / 31.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	31 ms	31608 KB	Output is correct
2	Correct	36 ms	31860 KB	Output is correct
3	Correct	34 ms	31896 KB	Output is correct
4	Correct	31 ms	31896 KB	Output is correct
5	Correct	33 ms	32068 KB	Output is correct
6	Correct	33 ms	32416 KB	Output is correct
7	Correct	32 ms	32416 KB	Output is correct
8	Correct	33 ms	32416 KB	Output is correct
9	Correct	35 ms	32416 KB	Output is correct
10	Correct	36 ms	32416 KB	Output is correct
11	Correct	528 ms	50596 KB	Output is correct
12	Correct	1058 ms	60776 KB	Output is correct
13	Correct	983 ms	66420 KB	Output is correct
14	Correct	1280 ms	68036 KB	Output is correct
15	Correct	1291 ms	69220 KB	Output is correct
16	Correct	1338 ms	111980 KB	Output is correct
17	Correct	965 ms	111980 KB	Output is correct
18	Correct	2013 ms	111980 KB	Output is correct
19	Correct	2111 ms	111980 KB	Output is correct
20	Correct	783 ms	111980 KB	Output is correct
21	Correct	81 ms	111980 KB	Output is correct
22	Correct	105 ms	111980 KB	Output is correct
23	Correct	145 ms	111980 KB	Output is correct
24	Correct	74 ms	111980 KB	Output is correct
25	Correct	96 ms	111980 KB	Output is correct
26	Correct	88 ms	111980 KB	Output is correct
27	Correct	127 ms	111980 KB	Output is correct
28	Correct	67 ms	111980 KB	Output is correct
29	Correct	91 ms	111980 KB	Output is correct
30	Correct	160 ms	111980 KB	Output is correct
31	Execution timed out	4037 ms	111980 KB	Time limit exceeded
32	Halted	0 ms	0 KB	-

Submission #62427

Compilation message

Subtask #1 20.0 / 20.0

Subtask #2 17.0 / 17.0

Subtask #3 18.0 / 18.0

Subtask #4 0 / 14.0

Subtask #5 0 / 31.0

Subtask #1
20.0 / 20.0

Subtask #2
17.0 / 17.0

Subtask #3
18.0 / 18.0

Subtask #4
0 / 14.0

Subtask #5
0 / 31.0