oj.uz

Submission #382392

# Submission time Handle Problem Language Result Execution time Memory
382392 2021-03-27T08:22:47 Z alishahali1382 Parachute rings (IOI12_rings) C++14
100 / 100
 1579 ms 69612 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("O2,unroll-loops")
//#pragma GCC optimize("no-stack-protector,fast-math")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<pii, int> piii;
typedef pair<ll, ll> pll;
#define debug(x) cerr<<#x<<'='<<(x)<<endl;
#define debugp(x) cerr<<#x<<"= {"<<(x.first)<<", "<<(x.second)<<"}"<<endl;
#define debug2(x, y) cerr<<"{"<<#x<<", "<<#y<<"} = {"<<(x)<<", "<<(y)<<"}"<<endl;
#define debugv(v) {cerr<<#v<<" : ";for (auto x:v) cerr<<x<<' ';cerr<<endl;}
#define all(x) x.begin(), x.end()
#define pb push_back
#define kill(x) return cout<<x<<'\n', 0;

const int inf=1000000010;
const ll INF=1000000000000001000LL;
const int mod=1000000007;
const int MAXN=1000010, LOG=20;

int n, m, k, u, v, x, y, t, a, b;
int tree=1, deg3, ans0, cycle;
int A[MAXN], B[MAXN], deg[MAXN];
vector<int> G[MAXN], V;

struct DSU{
	int par[MAXN];
	DSU(){
		iota(par, par+MAXN, 0);
	}
	int get(int x){ return (par[x]==x?x:par[x]=get(par[x]));}
	int join(int x, int y){
		x=get(x);
		y=get(y);
		par[x]=y;
		return x!=y;
	}
} dsu;
struct Solver{
	int deg[MAXN], root, ok=1;
	DSU dsu;
	void add_edge(int u, int v){
		if (u==root || v==root) return ;
		ok&=dsu.join(u, v);
		ok&=(2>=++deg[u]);
		ok&=(2>=++deg[v]);
	}
	int Get(){ return ok;}
} solver[4];


void Init(int nn){
	n=nn;
}
void Link(int u, int v){
	if (ans0) return ;
	if (deg3){
		for (int i:{0, 1, 2, 3}) solver[i].add_edge(u, v);
		return ;
	}
	A[m]=u;
	B[m]=v;
	m++;
	deg[u]++;
	deg[v]++;
	if (deg[u]==3) swap(u, v);
	if (deg[v]==3){
		V={v};
		for (int i=0; i<m; i++) if (A[i]==v || B[i]==v) V.pb(v^A[i]^B[i]);
		for (int i:{0, 1, 2, 3}){
			solver[i].root=V[i];
			for (int j=0; j<m; j++) solver[i].add_edge(A[j], B[j]);
		}
		deg3=1;
		return ;
	}
	if (dsu.join(u, v)) return ;
	if (tree){
		tree=0;
		for (int i=0; i<n; i++) if (dsu.get(i)==dsu.get(v)) cycle++;
	}
	else ans0=1;
}
int CountCritical(){
	if (ans0) return 0;
	if (deg3){
		int res=0;
		for (int i:{0, 1, 2, 3}) res+=solver[i].Get();
		return res;
	}
	if (tree) return n;
	return cycle;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 43372 KB Output is correct
2 Correct 31 ms 43500 KB Output is correct
3 Correct 33 ms 43628 KB Output is correct
4 Correct 30 ms 43500 KB Output is correct
5 Correct 31 ms 43500 KB Output is correct
6 Correct 32 ms 43500 KB Output is correct
7 Correct 30 ms 43500 KB Output is correct
8 Correct 31 ms 43500 KB Output is correct
9 Correct 32 ms 43628 KB Output is correct
10 Correct 31 ms 43628 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 208 ms 49516 KB Output is correct
2 Correct 792 ms 61164 KB Output is correct
3 Correct 1579 ms 63084 KB Output is correct
4 Correct 468 ms 55148 KB Output is correct
5 Correct 488 ms 55148 KB Output is correct
6 Correct 468 ms 54892 KB Output is correct
7 Correct 1450 ms 63212 KB Output is correct
8 Correct 865 ms 66796 KB Output is correct
9 Correct 901 ms 69612 KB Output is correct
10 Correct 408 ms 55404 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 43372 KB Output is correct
2 Correct 31 ms 43500 KB Output is correct
3 Correct 33 ms 43628 KB Output is correct
4 Correct 30 ms 43500 KB Output is correct
5 Correct 31 ms 43500 KB Output is correct
6 Correct 32 ms 43500 KB Output is correct
7 Correct 30 ms 43500 KB Output is correct
8 Correct 31 ms 43500 KB Output is correct
9 Correct 32 ms 43628 KB Output is correct
10 Correct 31 ms 43628 KB Output is correct
11 Correct 31 ms 43628 KB Output is correct
12 Correct 34 ms 43756 KB Output is correct
13 Correct 36 ms 43756 KB Output is correct
14 Correct 33 ms 43628 KB Output is correct
15 Correct 33 ms 43884 KB Output is correct
16 Correct 35 ms 43628 KB Output is correct
17 Correct 40 ms 43628 KB Output is correct
18 Correct 34 ms 43884 KB Output is correct
19 Correct 33 ms 43628 KB Output is correct
20 Correct 36 ms 43756 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 43372 KB Output is correct
2 Correct 31 ms 43500 KB Output is correct
3 Correct 33 ms 43628 KB Output is correct
4 Correct 30 ms 43500 KB Output is correct
5 Correct 31 ms 43500 KB Output is correct
6 Correct 32 ms 43500 KB Output is correct
7 Correct 30 ms 43500 KB Output is correct
8 Correct 31 ms 43500 KB Output is correct
9 Correct 32 ms 43628 KB Output is correct
10 Correct 31 ms 43628 KB Output is correct
11 Correct 31 ms 43628 KB Output is correct
12 Correct 34 ms 43756 KB Output is correct
13 Correct 36 ms 43756 KB Output is correct
14 Correct 33 ms 43628 KB Output is correct
15 Correct 33 ms 43884 KB Output is correct
16 Correct 35 ms 43628 KB Output is correct
17 Correct 40 ms 43628 KB Output is correct
18 Correct 34 ms 43884 KB Output is correct
19 Correct 33 ms 43628 KB Output is correct
20 Correct 36 ms 43756 KB Output is correct
21 Correct 43 ms 44140 KB Output is correct
22 Correct 51 ms 44396 KB Output is correct
23 Correct 57 ms 44652 KB Output is correct
24 Correct 70 ms 45164 KB Output is correct
25 Correct 45 ms 45292 KB Output is correct
26 Correct 67 ms 45548 KB Output is correct
27 Correct 58 ms 44524 KB Output is correct
28 Correct 73 ms 45292 KB Output is correct
29 Correct 61 ms 45676 KB Output is correct
30 Correct 60 ms 44652 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 43372 KB Output is correct
2 Correct 31 ms 43500 KB Output is correct
3 Correct 33 ms 43628 KB Output is correct
4 Correct 30 ms 43500 KB Output is correct
5 Correct 31 ms 43500 KB Output is correct
6 Correct 32 ms 43500 KB Output is correct
7 Correct 30 ms 43500 KB Output is correct
8 Correct 31 ms 43500 KB Output is correct
9 Correct 32 ms 43628 KB Output is correct
10 Correct 31 ms 43628 KB Output is correct
11 Correct 208 ms 49516 KB Output is correct
12 Correct 792 ms 61164 KB Output is correct
13 Correct 1579 ms 63084 KB Output is correct
14 Correct 468 ms 55148 KB Output is correct
15 Correct 488 ms 55148 KB Output is correct
16 Correct 468 ms 54892 KB Output is correct
17 Correct 1450 ms 63212 KB Output is correct
18 Correct 865 ms 66796 KB Output is correct
19 Correct 901 ms 69612 KB Output is correct
20 Correct 408 ms 55404 KB Output is correct
21 Correct 31 ms 43628 KB Output is correct
22 Correct 34 ms 43756 KB Output is correct
23 Correct 36 ms 43756 KB Output is correct
24 Correct 33 ms 43628 KB Output is correct
25 Correct 33 ms 43884 KB Output is correct
26 Correct 35 ms 43628 KB Output is correct
27 Correct 40 ms 43628 KB Output is correct
28 Correct 34 ms 43884 KB Output is correct
29 Correct 33 ms 43628 KB Output is correct
30 Correct 36 ms 43756 KB Output is correct
31 Correct 43 ms 44140 KB Output is correct
32 Correct 51 ms 44396 KB Output is correct
33 Correct 57 ms 44652 KB Output is correct
34 Correct 70 ms 45164 KB Output is correct
35 Correct 45 ms 45292 KB Output is correct
36 Correct 67 ms 45548 KB Output is correct
37 Correct 58 ms 44524 KB Output is correct
38 Correct 73 ms 45292 KB Output is correct
39 Correct 61 ms 45676 KB Output is correct
40 Correct 60 ms 44652 KB Output is correct
41 Correct 169 ms 49132 KB Output is correct
42 Correct 426 ms 64876 KB Output is correct
43 Correct 292 ms 60268 KB Output is correct
44 Correct 725 ms 61932 KB Output is correct
45 Correct 1006 ms 63964 KB Output is correct
46 Correct 392 ms 54508 KB Output is correct
47 Correct 445 ms 54636 KB Output is correct
48 Correct 490 ms 64876 KB Output is correct
49 Correct 383 ms 55404 KB Output is correct
50 Correct 400 ms 55148 KB Output is correct
51 Correct 315 ms 59884 KB Output is correct
52 Correct 692 ms 58604 KB Output is correct
53 Correct 477 ms 64236 KB Output is correct
54 Correct 819 ms 63340 KB Output is correct
55 Correct 966 ms 61292 KB Output is correct