oj.uz

Submission #546174

# Submission time Handle Problem Language Result Execution time Memory
546174 2022-04-06T15:13:35 Z keta_tsimakuridze Parachute rings (IOI12_rings) C++14
52 / 100
 1503 ms 262144 KB 
#include<bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pii pair<int,int>
const int N = 1000000 + 5;
int n, sz = 0, h[N];
int cycle[7],tried[7] , rem[7], stop = 0, p[N][7], built[2];
pii deg;
vector<int> V[7][N];
void Init(int N_) {
  n = N_;
  for(int i = 0; i < n; i++) {
  	for(int t = 0; t < 6; t++) {
  		p[i][t] = i;
	}
  }
}
int find(int a, int t) {
	return (p[a][t] == a ? p[a][t] :  p[a][t] = find(p[a][t], t));	
}
void merge(int a,int b, int t) {
	a = find(a, t); b = find(b, t);
	if(a == b) return;
	p[a][t] = b;
	return;
}
void dfs(int a, int p) {
	if(p == -1) h[a] = 1;
	else
	h[a] = h[p] + 1;
	for(int i = 0; i < V[5][a].size(); i++) {
		if(V[5][a][i] == p) continue;
		if(sz) return;
		if(h[V[5][a][i]]) { 
			sz = h[a] - h[V[5][a][i]] + 1;
			return;
		} else dfs(V[5][a][i], a);
	}
}
void add(int a, int b, int t) {
	if(a == rem[t] || b == rem[t]) return;
	V[t][a].push_back(b); V[t][b].push_back(a);
	tried[t] = max(tried[t], max((int)V[t][a].size(),(int) V[t][b].size()));
	if(find(a, t) == find(b, t)) cycle[t] = 1;
	else merge(a, b, t);
	return;	
}
void Link(int a, int b) {
	if(stop) return;
	V[5][a].push_back(b); V[5][b].push_back(a);
	deg = max(deg, {(int)V[5][a].size(), a});
	deg = max(deg, {(int)V[5][b].size(), b});
	if(find(a, 5) != find(b, 5)) {
		merge(a, b, 5);
	}
	else {
		if(!cycle[5]) {
			merge(a, b, 5);
			dfs(a, -1);
			cycle[5] = a + 1;
		}
		else if(find(a, 5) != find(cycle[5] - 1, 5)) {
			stop = 1;
		}
	}
	if(built[0]) {
		add(a, b, 0);
	}
	if(built[1]) {
		for(int i = 1; i <= 4; i++) add(a, b, i);
	}
	
}
void build(int t) {
	int u = rem[t];
	for(int i = 0; i < n; i++) {
		if(u == i) continue;
		for(int j = 0; j < V[5][i].size(); j++) {
			int v = V[5][i][j];
			if(v == u || v < i) continue;
			if(find(v, t) == find(i, t)) cycle[t] = 1;
			merge(i, v, t);
			V[t][i].push_back(v); V[t][v].push_back(i);
		}
	}
	for(int i = 0; i < n; i++) tried[t] = max(tried[t], (int)V[t][i].size());	
}
int CountCritical() {
	if(stop) return 0; 
	if(!cycle[5] && deg.f <= 2) return n;
	if(deg.f <= 2) return sz;
	
	if(deg.f >= 4) {
		if(!built[0]) {
			built[0] = 1;
			rem[0] = deg.s;
			build(0);
		}
		if(tried[0] <= 2 && !cycle[0]) return 1;
		stop = 1;
		return 0;
	}
	if(!built[1]) {
		built[1] = 1;
		rem[1] = deg.s; 
		assert(V[5][rem[1]].size() == 3);
		for(int i = 0; i < V[5][rem[1]].size(); i++) {
			rem[i + 2] = V[5][rem[1]][i]; 
		}
		for(int i = 1; i <= 4; i++) {
			build(i);
		}
	}
	int cn = 0;
	for(int i = 1; i <= 4; i++) {
		if(tried[i] <= 2 && !cycle[i]) cn++;
	}
	if(!cn) stop = 1;
	return cn;
}

Compilation message

rings.cpp: In function 'void dfs(int, int)':
rings.cpp:32:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for(int i = 0; i < V[5][a].size(); i++) {
      |                 ~~^~~~~~~~~~~~~~~~
rings.cpp: In function 'void build(int)':
rings.cpp:79:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |   for(int j = 0; j < V[5][i].size(); j++) {
      |                  ~~^~~~~~~~~~~~~~~~
rings.cpp: In function 'int CountCritical()':
rings.cpp:108:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |   for(int i = 0; i < V[5][rem[1]].size(); i++) {
      |                  ~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 164716 KB Output is correct
2 Correct 83 ms 165068 KB Output is correct
3 Correct 86 ms 165152 KB Output is correct
4 Correct 79 ms 164684 KB Output is correct
5 Correct 78 ms 164876 KB Output is correct
6 Correct 77 ms 165196 KB Output is correct
7 Correct 78 ms 164940 KB Output is correct
8 Correct 83 ms 164956 KB Output is correct
9 Correct 80 ms 165664 KB Output is correct
10 Correct 80 ms 165528 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 396 ms 195224 KB Output is correct
2 Correct 1175 ms 236632 KB Output is correct
3 Correct 564 ms 211176 KB Output is correct
4 Correct 994 ms 224932 KB Output is correct
5 Correct 977 ms 228508 KB Output is correct
6 Correct 1080 ms 256676 KB Output is correct
7 Correct 1503 ms 249408 KB Output is correct
8 Runtime error 1366 ms 262144 KB Execution killed with signal 9
9 Halted 0 ms 0 KB -

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 164716 KB Output is correct
2 Correct 83 ms 165068 KB Output is correct
3 Correct 86 ms 165152 KB Output is correct
4 Correct 79 ms 164684 KB Output is correct
5 Correct 78 ms 164876 KB Output is correct
6 Correct 77 ms 165196 KB Output is correct
7 Correct 78 ms 164940 KB Output is correct
8 Correct 83 ms 164956 KB Output is correct
9 Correct 80 ms 165664 KB Output is correct
10 Correct 80 ms 165528 KB Output is correct
11 Correct 82 ms 165652 KB Output is correct
12 Correct 88 ms 166644 KB Output is correct
13 Correct 93 ms 166768 KB Output is correct
14 Correct 87 ms 165340 KB Output is correct
15 Correct 81 ms 165580 KB Output is correct
16 Correct 80 ms 165268 KB Output is correct
17 Correct 88 ms 164976 KB Output is correct
18 Correct 91 ms 165476 KB Output is correct
19 Correct 82 ms 165328 KB Output is correct
20 Correct 94 ms 166476 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 164716 KB Output is correct
2 Correct 83 ms 165068 KB Output is correct
3 Correct 86 ms 165152 KB Output is correct
4 Correct 79 ms 164684 KB Output is correct
5 Correct 78 ms 164876 KB Output is correct
6 Correct 77 ms 165196 KB Output is correct
7 Correct 78 ms 164940 KB Output is correct
8 Correct 83 ms 164956 KB Output is correct
9 Correct 80 ms 165664 KB Output is correct
10 Correct 80 ms 165528 KB Output is correct
11 Correct 82 ms 165652 KB Output is correct
12 Correct 88 ms 166644 KB Output is correct
13 Correct 93 ms 166768 KB Output is correct
14 Correct 87 ms 165340 KB Output is correct
15 Correct 81 ms 165580 KB Output is correct
16 Correct 80 ms 165268 KB Output is correct
17 Correct 88 ms 164976 KB Output is correct
18 Correct 91 ms 165476 KB Output is correct
19 Correct 82 ms 165328 KB Output is correct
20 Correct 94 ms 166476 KB Output is correct
21 Correct 91 ms 167024 KB Output is correct
22 Correct 100 ms 168524 KB Output is correct
23 Correct 108 ms 169444 KB Output is correct
24 Correct 137 ms 170544 KB Output is correct
25 Correct 102 ms 168780 KB Output is correct
26 Correct 209 ms 179916 KB Output is correct
27 Correct 128 ms 169416 KB Output is correct
28 Correct 101 ms 167632 KB Output is correct
29 Correct 100 ms 168268 KB Output is correct
30 Correct 139 ms 171652 KB Output is correct

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 164716 KB Output is correct
2 Correct 83 ms 165068 KB Output is correct
3 Correct 86 ms 165152 KB Output is correct
4 Correct 79 ms 164684 KB Output is correct
5 Correct 78 ms 164876 KB Output is correct
6 Correct 77 ms 165196 KB Output is correct
7 Correct 78 ms 164940 KB Output is correct
8 Correct 83 ms 164956 KB Output is correct
9 Correct 80 ms 165664 KB Output is correct
10 Correct 80 ms 165528 KB Output is correct
11 Correct 396 ms 195224 KB Output is correct
12 Correct 1175 ms 236632 KB Output is correct
13 Correct 564 ms 211176 KB Output is correct
14 Correct 994 ms 224932 KB Output is correct
15 Correct 977 ms 228508 KB Output is correct
16 Correct 1080 ms 256676 KB Output is correct
17 Correct 1503 ms 249408 KB Output is correct
18 Runtime error 1366 ms 262144 KB Execution killed with signal 9
19 Halted 0 ms 0 KB -