Submission #62436

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
62436	2018-07-28T13:03:23 Z	zadrga	Parachute rings (IOI12_rings)	C++14	55 / 100	4000 ms	108080 KB

rings

// 14.47
 
#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;
			break;
		}
	}
 
	if(ret)
		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; 
 
	int sz[5], v[5];
	memset(sz, 0, sizeof(sz));
	
	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] = i;
		sz[cur]++;
	}
 
	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]);
		for(pii x : adj[v[3]])
			ans += check(x.fi);
 
		return ans;
	}
 
	if(max_degree == 4){
		if(sz[4] > 1)
			return 0;
 
		int ans = check(v[4]);
		return ans;
	}
}

Compilation message

rings.cpp: In function 'int CountCritical()':
rings.cpp:150:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	30 ms	31608 KB	Output is correct
2	Correct	33 ms	31888 KB	Output is correct
3	Correct	33 ms	31904 KB	Output is correct
4	Correct	32 ms	31904 KB	Output is correct
5	Correct	38 ms	31976 KB	Output is correct
6	Correct	40 ms	32264 KB	Output is correct
7	Correct	28 ms	32264 KB	Output is correct
8	Correct	42 ms	32264 KB	Output is correct
9	Correct	35 ms	32264 KB	Output is correct
10	Correct	34 ms	32264 KB	Output is correct

Subtask #2
17.0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	529 ms	48272 KB	Output is correct
2	Correct	1014 ms	57556 KB	Output is correct
3	Correct	932 ms	61252 KB	Output is correct
4	Correct	1350 ms	63988 KB	Output is correct
5	Correct	1367 ms	65208 KB	Output is correct
6	Correct	1396 ms	108080 KB	Output is correct
7	Correct	921 ms	108080 KB	Output is correct
8	Correct	1511 ms	108080 KB	Output is correct
9	Correct	1340 ms	108080 KB	Output is correct
10	Correct	750 ms	108080 KB	Output is correct

Subtask #3
18.0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	30 ms	31608 KB	Output is correct
2	Correct	33 ms	31888 KB	Output is correct
3	Correct	33 ms	31904 KB	Output is correct
4	Correct	32 ms	31904 KB	Output is correct
5	Correct	38 ms	31976 KB	Output is correct
6	Correct	40 ms	32264 KB	Output is correct
7	Correct	28 ms	32264 KB	Output is correct
8	Correct	42 ms	32264 KB	Output is correct
9	Correct	35 ms	32264 KB	Output is correct
10	Correct	34 ms	32264 KB	Output is correct
11	Correct	77 ms	108080 KB	Output is correct
12	Correct	95 ms	108080 KB	Output is correct
13	Correct	135 ms	108080 KB	Output is correct
14	Correct	70 ms	108080 KB	Output is correct
15	Correct	90 ms	108080 KB	Output is correct
16	Correct	85 ms	108080 KB	Output is correct
17	Correct	42 ms	108080 KB	Output is correct
18	Correct	48 ms	108080 KB	Output is correct
19	Correct	88 ms	108080 KB	Output is correct
20	Correct	98 ms	108080 KB	Output is correct

Subtask #4
0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	30 ms	31608 KB	Output is correct
2	Correct	33 ms	31888 KB	Output is correct
3	Correct	33 ms	31904 KB	Output is correct
4	Correct	32 ms	31904 KB	Output is correct
5	Correct	38 ms	31976 KB	Output is correct
6	Correct	40 ms	32264 KB	Output is correct
7	Correct	28 ms	32264 KB	Output is correct
8	Correct	42 ms	32264 KB	Output is correct
9	Correct	35 ms	32264 KB	Output is correct
10	Correct	34 ms	32264 KB	Output is correct
11	Correct	77 ms	108080 KB	Output is correct
12	Correct	95 ms	108080 KB	Output is correct
13	Correct	135 ms	108080 KB	Output is correct
14	Correct	70 ms	108080 KB	Output is correct
15	Correct	90 ms	108080 KB	Output is correct
16	Correct	85 ms	108080 KB	Output is correct
17	Correct	42 ms	108080 KB	Output is correct
18	Correct	48 ms	108080 KB	Output is correct
19	Correct	88 ms	108080 KB	Output is correct
20	Correct	98 ms	108080 KB	Output is correct
21	Execution timed out	4027 ms	108080 KB	Time limit exceeded
22	Halted	0 ms	0 KB	-

Subtask #5
0 / 31.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	30 ms	31608 KB	Output is correct
2	Correct	33 ms	31888 KB	Output is correct
3	Correct	33 ms	31904 KB	Output is correct
4	Correct	32 ms	31904 KB	Output is correct
5	Correct	38 ms	31976 KB	Output is correct
6	Correct	40 ms	32264 KB	Output is correct
7	Correct	28 ms	32264 KB	Output is correct
8	Correct	42 ms	32264 KB	Output is correct
9	Correct	35 ms	32264 KB	Output is correct
10	Correct	34 ms	32264 KB	Output is correct
11	Correct	529 ms	48272 KB	Output is correct
12	Correct	1014 ms	57556 KB	Output is correct
13	Correct	932 ms	61252 KB	Output is correct
14	Correct	1350 ms	63988 KB	Output is correct
15	Correct	1367 ms	65208 KB	Output is correct
16	Correct	1396 ms	108080 KB	Output is correct
17	Correct	921 ms	108080 KB	Output is correct
18	Correct	1511 ms	108080 KB	Output is correct
19	Correct	1340 ms	108080 KB	Output is correct
20	Correct	750 ms	108080 KB	Output is correct
21	Correct	77 ms	108080 KB	Output is correct
22	Correct	95 ms	108080 KB	Output is correct
23	Correct	135 ms	108080 KB	Output is correct
24	Correct	70 ms	108080 KB	Output is correct
25	Correct	90 ms	108080 KB	Output is correct
26	Correct	85 ms	108080 KB	Output is correct
27	Correct	42 ms	108080 KB	Output is correct
28	Correct	48 ms	108080 KB	Output is correct
29	Correct	88 ms	108080 KB	Output is correct
30	Correct	98 ms	108080 KB	Output is correct
31	Execution timed out	4027 ms	108080 KB	Time limit exceeded
32	Halted	0 ms	0 KB	-

Submission #62436

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