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Submission #427708

# Submission time Handle Problem Language Result Execution time Memory
427708 2021-06-14T19:27:20 Z MarcoMeijer Parachute rings (IOI12_rings) C++14
100 / 100
 2932 ms 193620 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> ii;
typedef vector<ll> vll;
typedef vector<int> vi;
typedef vector<ii> vii;

#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define RE(a,b) REP(a,0,b)
#define RE1(a,b) REP(a,1,b+1)
#define FOR(a,b) for(auto& a : b)
#define pb push_back
#define fi first
#define se second
#define all(a) a.begin(), e.end()

const int MX = 1e6+10;

int n;

struct DSU {
  int p[MX], r[MX], sz[MX], e[MX][2];
  int cnt[MX];
  int bigCnt = 0, smallCnt = 0;
  int cycles = 0, cycleLength = 0;
  void build() {
    RE(i,n) p[i] = i, r[i]=0, e[i][0]=e[i][1]=i, sz[i] = 1;
    RE(i,n) cnt[i] = 0;
  }
  int getSet(int x) {return x==p[x] ? x : p[x]=getSet(p[x]);}
  void link(int x, int y) {
    cnt[x]++;
    cnt[y]++;
    if(cnt[x] == 4) bigCnt++;
    if(cnt[y] == 4) bigCnt++;
    if(cnt[x] == 3) smallCnt++;
    if(cnt[y] == 3) smallCnt++;
    int u = getSet(x), v = getSet(y);
    if((e[u][0] == x && e[u][1] == y) || (e[u][0] == y && e[u][1] == x)) {
      cycles++;
      cycleLength = sz[u];
      return;
    }
    if(u != v) {
      sz[u] = sz[v] = sz[u] + sz[v];
      int i = 0, j = 0;
      if(e[u][0] != x) i = 1;
      if(e[v][0] != y) j = 1;
      e[u][i] = e[v][!j];
      RE(i,2) e[v][i] = e[u][i];
      if(r[u] > r[v]) {
        p[v] = u;
      } else {
        p[u] = v;
        if(r[u] == r[v]) r[v]++;
      }
    }
  }
};

DSU g;
vi adj[MX];
vii opperations;
bool started = false;
DSU other[4]; int ign[4];

void Init(int N_) {
  n = N_;
  g.build();
}

void createGraph(int i) {
  other[i].build();
  FOR(p,opperations) {
    int A = p.fi, B = p.se;
    if(A == ign[i] || B == ign[i])
      continue;
    other[i].link(A,B);
  }
}
void Link(int A, int B) {
  adj[A].pb(B);
  adj[B].pb(A);
  opperations.pb({A,B});
  g.link(A,B);
  if(started) {
    RE(i,4) {
      if(A == ign[i] || B == ign[i])
        continue;
      other[i].link(A,B);
    }
  }
  else if(adj[A].size() == 3 || adj[B].size() == 3) {
    int u = A;
    if(adj[B].size() == 3) u = B;
    ign[0] = u; int i=0;
    FOR(v,adj[u]) ign[++i] = v;
    RE(i,4) createGraph(i);
    started = true;
  }
}

int CountCritical() {
  if(g.bigCnt >= 2)
    return 0;
  if(started) {
    int cnt = 0;
    RE(i,4)
      if(other[i].cycles == 0 && other[i].smallCnt == 0)
        cnt++;
    return cnt;
  }
  if(g.cycles == 0)
    return n;
  if(g.cycles >= 2)
    return 0;
  return g.cycleLength;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23824 KB Output is correct
2 Correct 17 ms 24652 KB Output is correct
3 Correct 17 ms 24772 KB Output is correct
4 Correct 14 ms 23824 KB Output is correct
5 Correct 15 ms 24104 KB Output is correct
6 Correct 17 ms 24164 KB Output is correct
7 Correct 16 ms 24516 KB Output is correct
8 Correct 15 ms 24140 KB Output is correct
9 Correct 17 ms 24780 KB Output is correct
10 Correct 17 ms 24896 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 562 ms 57604 KB Output is correct
2 Correct 2457 ms 149804 KB Output is correct
3 Correct 2758 ms 176092 KB Output is correct
4 Correct 1430 ms 86568 KB Output is correct
5 Correct 1414 ms 99804 KB Output is correct
6 Correct 1378 ms 98000 KB Output is correct
7 Correct 2674 ms 187100 KB Output is correct
8 Correct 2823 ms 182844 KB Output is correct
9 Correct 2932 ms 193620 KB Output is correct
10 Correct 965 ms 96936 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23824 KB Output is correct
2 Correct 17 ms 24652 KB Output is correct
3 Correct 17 ms 24772 KB Output is correct
4 Correct 14 ms 23824 KB Output is correct
5 Correct 15 ms 24104 KB Output is correct
6 Correct 17 ms 24164 KB Output is correct
7 Correct 16 ms 24516 KB Output is correct
8 Correct 15 ms 24140 KB Output is correct
9 Correct 17 ms 24780 KB Output is correct
10 Correct 17 ms 24896 KB Output is correct
11 Correct 22 ms 24776 KB Output is correct
12 Correct 21 ms 25604 KB Output is correct
13 Correct 21 ms 25692 KB Output is correct
14 Correct 20 ms 25420 KB Output is correct
15 Correct 21 ms 26644 KB Output is correct
16 Correct 24 ms 24564 KB Output is correct
17 Correct 24 ms 25684 KB Output is correct
18 Correct 26 ms 26864 KB Output is correct
19 Correct 20 ms 24688 KB Output is correct
20 Correct 23 ms 25676 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23824 KB Output is correct
2 Correct 17 ms 24652 KB Output is correct
3 Correct 17 ms 24772 KB Output is correct
4 Correct 14 ms 23824 KB Output is correct
5 Correct 15 ms 24104 KB Output is correct
6 Correct 17 ms 24164 KB Output is correct
7 Correct 16 ms 24516 KB Output is correct
8 Correct 15 ms 24140 KB Output is correct
9 Correct 17 ms 24780 KB Output is correct
10 Correct 17 ms 24896 KB Output is correct
11 Correct 22 ms 24776 KB Output is correct
12 Correct 21 ms 25604 KB Output is correct
13 Correct 21 ms 25692 KB Output is correct
14 Correct 20 ms 25420 KB Output is correct
15 Correct 21 ms 26644 KB Output is correct
16 Correct 24 ms 24564 KB Output is correct
17 Correct 24 ms 25684 KB Output is correct
18 Correct 26 ms 26864 KB Output is correct
19 Correct 20 ms 24688 KB Output is correct
20 Correct 23 ms 25676 KB Output is correct
21 Correct 51 ms 26572 KB Output is correct
22 Correct 70 ms 28124 KB Output is correct
23 Correct 66 ms 29452 KB Output is correct
24 Correct 181 ms 37520 KB Output is correct
25 Correct 41 ms 36228 KB Output is correct
26 Correct 133 ms 38588 KB Output is correct
27 Correct 84 ms 30220 KB Output is correct
28 Correct 156 ms 38772 KB Output is correct
29 Correct 95 ms 38096 KB Output is correct
30 Correct 101 ms 31128 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23824 KB Output is correct
2 Correct 17 ms 24652 KB Output is correct
3 Correct 17 ms 24772 KB Output is correct
4 Correct 14 ms 23824 KB Output is correct
5 Correct 15 ms 24104 KB Output is correct
6 Correct 17 ms 24164 KB Output is correct
7 Correct 16 ms 24516 KB Output is correct
8 Correct 15 ms 24140 KB Output is correct
9 Correct 17 ms 24780 KB Output is correct
10 Correct 17 ms 24896 KB Output is correct
11 Correct 562 ms 57604 KB Output is correct
12 Correct 2457 ms 149804 KB Output is correct
13 Correct 2758 ms 176092 KB Output is correct
14 Correct 1430 ms 86568 KB Output is correct
15 Correct 1414 ms 99804 KB Output is correct
16 Correct 1378 ms 98000 KB Output is correct
17 Correct 2674 ms 187100 KB Output is correct
18 Correct 2823 ms 182844 KB Output is correct
19 Correct 2932 ms 193620 KB Output is correct
20 Correct 965 ms 96936 KB Output is correct
21 Correct 22 ms 24776 KB Output is correct
22 Correct 21 ms 25604 KB Output is correct
23 Correct 21 ms 25692 KB Output is correct
24 Correct 20 ms 25420 KB Output is correct
25 Correct 21 ms 26644 KB Output is correct
26 Correct 24 ms 24564 KB Output is correct
27 Correct 24 ms 25684 KB Output is correct
28 Correct 26 ms 26864 KB Output is correct
29 Correct 20 ms 24688 KB Output is correct
30 Correct 23 ms 25676 KB Output is correct
31 Correct 51 ms 26572 KB Output is correct
32 Correct 70 ms 28124 KB Output is correct
33 Correct 66 ms 29452 KB Output is correct
34 Correct 181 ms 37520 KB Output is correct
35 Correct 41 ms 36228 KB Output is correct
36 Correct 133 ms 38588 KB Output is correct
37 Correct 84 ms 30220 KB Output is correct
38 Correct 156 ms 38772 KB Output is correct
39 Correct 95 ms 38096 KB Output is correct
40 Correct 101 ms 31128 KB Output is correct
41 Correct 279 ms 49152 KB Output is correct
42 Correct 1098 ms 148540 KB Output is correct
43 Correct 439 ms 139960 KB Output is correct
44 Correct 2036 ms 179400 KB Output is correct
45 Correct 1821 ms 175948 KB Output is correct
46 Correct 898 ms 87544 KB Output is correct
47 Correct 1215 ms 88800 KB Output is correct
48 Correct 1150 ms 166760 KB Output is correct
49 Correct 880 ms 88852 KB Output is correct
50 Correct 945 ms 88140 KB Output is correct
51 Correct 597 ms 126532 KB Output is correct
52 Correct 1655 ms 149096 KB Output is correct
53 Correct 1214 ms 167208 KB Output is correct
54 Correct 2396 ms 161252 KB Output is correct
55 Correct 2840 ms 173796 KB Output is correct