oj.uz

Submission #107684

# Submission time Handle Problem Language Result Execution time Memory
107684 2019-04-25T12:41:15 Z MrTEK Parachute rings (IOI12_rings) C++14
100 / 100
 2842 ms 121300 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 5;
int dad[N][5],ans[5],deg[N][5],lst[5],wh[5],vis[N];
int n,m,cnt;
vector <int> ed[N];
pair <int,int> edge[N];
bool flag = 0;
 
int find(int u,int x) {
  if (dad[u][x] == u)
    return dad[u][x];
  return dad[u][x] = find(dad[u][x],x);
}
 
bool merge(int u,int v,int x) {
  int du = find(u,x);
  int dv = find(v,x);
  if (du == dv)
    return false;
  dad[du][x] = dv;
  return true;
}
 
void dfs(int cur) {
  if (vis[cur])
    return;
  vis[cur] = 1;
  cnt++;
  for (auto i : ed[cur])
    dfs(i);
}
 
int get(int cur) {
  cnt = 0;
  dfs(cur);
  return cnt;
}
 
void Init(int N_) {
  n = N_;
  for (int i = 0 ; i < 5 ; i++) {
    ans[i] = 1;
    lst[i] = 1;
    for (int j = 1 ; j <= n ; j++) {
      dad[j][i] = j;
      deg[j][i] = 0;
    }
  }
  ans[0] = n;
}
 
void Link(int A, int B) {
  A++ , B++;
  deg[A][0]++;
  deg[B][0]++;
  ed[A].push_back(B);
  ed[B].push_back(A);
  edge[++m] = {A,B};
  if (flag)
    return;
  if (deg[A][0] == 3) {
    int t = 1;
    wh[1] =  A;
    for (auto i : ed[A])
      wh[++t] = i;
    flag = true;
  }
  else if (deg[B][0] == 3) {
    int t = 1;
    wh[1] =  B;
    for (auto i : ed[B])
      wh[++t] = i;
    flag = true;
  }
  else if (merge(A,B,0) == false)
    ans[0] != n ? ans[0] = 0 : ans[0] = get(A);
}
 
int CountCritical() {
  if (flag == false)
    return ans[0];
  int res = 0;
  for  (int i = 1 ; i < 5 ; i++) {
    if (ans[i] == 0)
      continue;
    for ( ; lst[i] <= m ; lst[i]++) {
      int u = edge[lst[i]].first;
      int v = edge[lst[i]].second;
      if (u == wh[i] || v == wh[i])
        continue;
      deg[u][i]++;
      deg[v][i]++;
      if (deg[u][i] == 3 || deg[v][i] == 3 || merge(u,v,i) == false)
        ans[i] = 0;
    }
    res += ans[i];
  }
  return res;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 23808 KB Output is correct
2 Correct 26 ms 24184 KB Output is correct
3 Correct 25 ms 24320 KB Output is correct
4 Correct 23 ms 23936 KB Output is correct
5 Correct 25 ms 24192 KB Output is correct
6 Correct 26 ms 24448 KB Output is correct
7 Correct 25 ms 24064 KB Output is correct
8 Correct 29 ms 24184 KB Output is correct
9 Correct 26 ms 24356 KB Output is correct
10 Correct 27 ms 24312 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 638 ms 64744 KB Output is correct
2 Correct 2107 ms 86500 KB Output is correct
3 Correct 2190 ms 97644 KB Output is correct
4 Correct 1588 ms 103744 KB Output is correct
5 Correct 1603 ms 108336 KB Output is correct
6 Correct 1815 ms 121300 KB Output is correct
7 Correct 2095 ms 98480 KB Output is correct
8 Correct 2657 ms 98836 KB Output is correct
9 Correct 2842 ms 103756 KB Output is correct
10 Correct 1189 ms 103972 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 23808 KB Output is correct
2 Correct 26 ms 24184 KB Output is correct
3 Correct 25 ms 24320 KB Output is correct
4 Correct 23 ms 23936 KB Output is correct
5 Correct 25 ms 24192 KB Output is correct
6 Correct 26 ms 24448 KB Output is correct
7 Correct 25 ms 24064 KB Output is correct
8 Correct 29 ms 24184 KB Output is correct
9 Correct 26 ms 24356 KB Output is correct
10 Correct 27 ms 24312 KB Output is correct
11 Correct 32 ms 24404 KB Output is correct
12 Correct 42 ms 24796 KB Output is correct
13 Correct 31 ms 24832 KB Output is correct
14 Correct 27 ms 24576 KB Output is correct
15 Correct 30 ms 24952 KB Output is correct
16 Correct 28 ms 24832 KB Output is correct
17 Correct 32 ms 24832 KB Output is correct
18 Correct 39 ms 25464 KB Output is correct
19 Correct 33 ms 24824 KB Output is correct
20 Correct 33 ms 24700 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 23808 KB Output is correct
2 Correct 26 ms 24184 KB Output is correct
3 Correct 25 ms 24320 KB Output is correct
4 Correct 23 ms 23936 KB Output is correct
5 Correct 25 ms 24192 KB Output is correct
6 Correct 26 ms 24448 KB Output is correct
7 Correct 25 ms 24064 KB Output is correct
8 Correct 29 ms 24184 KB Output is correct
9 Correct 26 ms 24356 KB Output is correct
10 Correct 27 ms 24312 KB Output is correct
11 Correct 32 ms 24404 KB Output is correct
12 Correct 42 ms 24796 KB Output is correct
13 Correct 31 ms 24832 KB Output is correct
14 Correct 27 ms 24576 KB Output is correct
15 Correct 30 ms 24952 KB Output is correct
16 Correct 28 ms 24832 KB Output is correct
17 Correct 32 ms 24832 KB Output is correct
18 Correct 39 ms 25464 KB Output is correct
19 Correct 33 ms 24824 KB Output is correct
20 Correct 33 ms 24700 KB Output is correct
21 Correct 58 ms 27380 KB Output is correct
22 Correct 74 ms 29472 KB Output is correct
23 Correct 85 ms 31040 KB Output is correct
24 Correct 95 ms 30400 KB Output is correct
25 Correct 45 ms 28280 KB Output is correct
26 Correct 85 ms 31096 KB Output is correct
27 Correct 111 ms 31728 KB Output is correct
28 Correct 120 ms 31972 KB Output is correct
29 Correct 86 ms 30152 KB Output is correct
30 Correct 141 ms 33444 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 23808 KB Output is correct
2 Correct 26 ms 24184 KB Output is correct
3 Correct 25 ms 24320 KB Output is correct
4 Correct 23 ms 23936 KB Output is correct
5 Correct 25 ms 24192 KB Output is correct
6 Correct 26 ms 24448 KB Output is correct
7 Correct 25 ms 24064 KB Output is correct
8 Correct 29 ms 24184 KB Output is correct
9 Correct 26 ms 24356 KB Output is correct
10 Correct 27 ms 24312 KB Output is correct
11 Correct 638 ms 64744 KB Output is correct
12 Correct 2107 ms 86500 KB Output is correct
13 Correct 2190 ms 97644 KB Output is correct
14 Correct 1588 ms 103744 KB Output is correct
15 Correct 1603 ms 108336 KB Output is correct
16 Correct 1815 ms 121300 KB Output is correct
17 Correct 2095 ms 98480 KB Output is correct
18 Correct 2657 ms 98836 KB Output is correct
19 Correct 2842 ms 103756 KB Output is correct
20 Correct 1189 ms 103972 KB Output is correct
21 Correct 32 ms 24404 KB Output is correct
22 Correct 42 ms 24796 KB Output is correct
23 Correct 31 ms 24832 KB Output is correct
24 Correct 27 ms 24576 KB Output is correct
25 Correct 30 ms 24952 KB Output is correct
26 Correct 28 ms 24832 KB Output is correct
27 Correct 32 ms 24832 KB Output is correct
28 Correct 39 ms 25464 KB Output is correct
29 Correct 33 ms 24824 KB Output is correct
30 Correct 33 ms 24700 KB Output is correct
31 Correct 58 ms 27380 KB Output is correct
32 Correct 74 ms 29472 KB Output is correct
33 Correct 85 ms 31040 KB Output is correct
34 Correct 95 ms 30400 KB Output is correct
35 Correct 45 ms 28280 KB Output is correct
36 Correct 85 ms 31096 KB Output is correct
37 Correct 111 ms 31728 KB Output is correct
38 Correct 120 ms 31972 KB Output is correct
39 Correct 86 ms 30152 KB Output is correct
40 Correct 141 ms 33444 KB Output is correct
41 Correct 335 ms 55216 KB Output is correct
42 Correct 951 ms 77832 KB Output is correct
43 Correct 370 ms 65784 KB Output is correct
44 Correct 840 ms 96768 KB Output is correct
45 Correct 844 ms 90240 KB Output is correct
46 Correct 1083 ms 91096 KB Output is correct
47 Correct 1520 ms 103804 KB Output is correct
48 Correct 636 ms 83648 KB Output is correct
49 Correct 982 ms 95816 KB Output is correct
50 Correct 1171 ms 94840 KB Output is correct
51 Correct 387 ms 62584 KB Output is correct
52 Correct 751 ms 83596 KB Output is correct
53 Correct 577 ms 84312 KB Output is correct
54 Correct 1934 ms 88820 KB Output is correct
55 Correct 1423 ms 94332 KB Output is correct