oj.uz

Submission #600220

# Submission time Handle Problem Language Result Execution time Memory
600220 2022-07-20T14:30:03 Z MilosMilutinovic Parachute rings (IOI12_rings) C++14
100 / 100
 1846 ms 111388 KB 
/**
 *    author:  wxhtzdy
 *    created: 18.07.2022 00:00:16
**/
#include <bits/stdc++.h>

using namespace std;

class dsu {
  public:
  vector<int> p;
  int n;
  dsu(int _n) : n(_n) {
    p.resize(n);
    iota(p.begin(), p.end(), 0);
  }
  inline int get(int x) {
    return (x == p[x] ? x : (p[x] = get(p[x])));
  }
  inline bool unite(int x, int y) {
    x = get(x);
    y = get(y);
    if (x != y) {
      p[x] = y;
      return true;
    }
    return false;
  }
};

const int MAXN = 1000005;

vector<int> g[MAXN];
int vis[MAXN];
int prv[MAXN];
int deg[4][MAXN];
int good[MAXN];
int ver[4];

vector<int> cyc;
vector<pair<int, int>> edges;

vector<dsu> f(4, dsu(MAXN));

int state, ans;
dsu d(MAXN);

void state1(int v) {
  state = 1;
  ans = 0;
  for (int i = 0; i < MAXN; i++) {
    if (d.get(i) == d.get(v)) {
      ans += 1;
    }
  }
}

void state2(int i) {
  ver[0] = i;
  assert((int) g[i].size() == 3);
  for (int j = 0; j < (int) g[i].size(); j++) {
    ver[1 + j] = g[i][j];
  }
  for (int i = 0; i < 4; i++) {
    good[i] = true;
  } 
  for (auto& p : edges) {
    int u = p.first;
    int v = p.second;
    for (int i = 0; i < 4; i++) {
      if (ver[i] == u || ver[i] == v) {
        continue;
      }
      ++deg[i][u];
      ++deg[i][v];
      if (deg[i][u] >= 3) {
        good[i] = false;
      }      
      if (deg[i][v] >= 3) {
        good[i] = false;
      }
      if (!f[i].unite(u, v)) {
        good[i] = false;
      }
    }
  }
  state = 2;                     
}

void state3() {
  state = 3;
  ans = 0;
}

void Init(int n) {
  state = 0;
  ans = n;
}

void Link(int a, int b) {
  g[a].push_back(b);
  g[b].push_back(a);
  edges.emplace_back(a, b);
  if (state == 0 || state == 1) {
    if (d.unite(a, b)) {
      if ((int) g[a].size() >= 3) {
        state2(a);
      } else if ((int) g[b].size() >= 3) {
        state2(b);
      }
    } else {
      if (state == 0) {
        state1(a);   
      } else {
        state3();
      }
    }
  } else if (state == 2) {
    for (int i = 0; i < 4; i++) {
      if (ver[i] == a || ver[i] == b) {
        continue;
      }
      ++deg[i][a];
      ++deg[i][b];
      if (deg[i][a] >= 3) {
        good[i] = false;
      }      
      if (deg[i][b] >= 3) {
        good[i] = false;
      }
      if (!f[i].unite(a, b)) {
        good[i] = false;
      }
    }   
  }
} 

int CountCritical() {
  if (state == 2) {
    ans = 0;
    for (int i = 0; i < 4; i++) {
      if (good[i]) {
        ans += 1;
      }
    }
  }
  return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 43348 KB Output is correct
2 Correct 24 ms 43612 KB Output is correct
3 Correct 26 ms 43788 KB Output is correct
4 Correct 27 ms 43352 KB Output is correct
5 Correct 28 ms 43512 KB Output is correct
6 Correct 34 ms 43688 KB Output is correct
7 Correct 24 ms 43536 KB Output is correct
8 Correct 29 ms 43476 KB Output is correct
9 Correct 24 ms 43680 KB Output is correct
10 Correct 24 ms 43732 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 332 ms 63696 KB Output is correct
2 Correct 1129 ms 87280 KB Output is correct
3 Correct 1846 ms 106480 KB Output is correct
4 Correct 897 ms 95840 KB Output is correct
5 Correct 938 ms 95868 KB Output is correct
6 Correct 872 ms 94256 KB Output is correct
7 Correct 1762 ms 104996 KB Output is correct
8 Correct 1389 ms 107280 KB Output is correct
9 Correct 1563 ms 111388 KB Output is correct
10 Correct 649 ms 93300 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 43348 KB Output is correct
2 Correct 24 ms 43612 KB Output is correct
3 Correct 26 ms 43788 KB Output is correct
4 Correct 27 ms 43352 KB Output is correct
5 Correct 28 ms 43512 KB Output is correct
6 Correct 34 ms 43688 KB Output is correct
7 Correct 24 ms 43536 KB Output is correct
8 Correct 29 ms 43476 KB Output is correct
9 Correct 24 ms 43680 KB Output is correct
10 Correct 24 ms 43732 KB Output is correct
11 Correct 30 ms 43656 KB Output is correct
12 Correct 31 ms 44052 KB Output is correct
13 Correct 26 ms 44108 KB Output is correct
14 Correct 26 ms 43812 KB Output is correct
15 Correct 27 ms 44040 KB Output is correct
16 Correct 29 ms 43920 KB Output is correct
17 Correct 38 ms 44032 KB Output is correct
18 Correct 28 ms 44304 KB Output is correct
19 Correct 28 ms 43920 KB Output is correct
20 Correct 28 ms 44176 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 43348 KB Output is correct
2 Correct 24 ms 43612 KB Output is correct
3 Correct 26 ms 43788 KB Output is correct
4 Correct 27 ms 43352 KB Output is correct
5 Correct 28 ms 43512 KB Output is correct
6 Correct 34 ms 43688 KB Output is correct
7 Correct 24 ms 43536 KB Output is correct
8 Correct 29 ms 43476 KB Output is correct
9 Correct 24 ms 43680 KB Output is correct
10 Correct 24 ms 43732 KB Output is correct
11 Correct 30 ms 43656 KB Output is correct
12 Correct 31 ms 44052 KB Output is correct
13 Correct 26 ms 44108 KB Output is correct
14 Correct 26 ms 43812 KB Output is correct
15 Correct 27 ms 44040 KB Output is correct
16 Correct 29 ms 43920 KB Output is correct
17 Correct 38 ms 44032 KB Output is correct
18 Correct 28 ms 44304 KB Output is correct
19 Correct 28 ms 43920 KB Output is correct
20 Correct 28 ms 44176 KB Output is correct
21 Correct 37 ms 44936 KB Output is correct
22 Correct 45 ms 45812 KB Output is correct
23 Correct 60 ms 46604 KB Output is correct
24 Correct 71 ms 47668 KB Output is correct
25 Correct 36 ms 45484 KB Output is correct
26 Correct 65 ms 48332 KB Output is correct
27 Correct 66 ms 47760 KB Output is correct
28 Correct 86 ms 49236 KB Output is correct
29 Correct 80 ms 47396 KB Output is correct
30 Correct 99 ms 48488 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 43348 KB Output is correct
2 Correct 24 ms 43612 KB Output is correct
3 Correct 26 ms 43788 KB Output is correct
4 Correct 27 ms 43352 KB Output is correct
5 Correct 28 ms 43512 KB Output is correct
6 Correct 34 ms 43688 KB Output is correct
7 Correct 24 ms 43536 KB Output is correct
8 Correct 29 ms 43476 KB Output is correct
9 Correct 24 ms 43680 KB Output is correct
10 Correct 24 ms 43732 KB Output is correct
11 Correct 332 ms 63696 KB Output is correct
12 Correct 1129 ms 87280 KB Output is correct
13 Correct 1846 ms 106480 KB Output is correct
14 Correct 897 ms 95840 KB Output is correct
15 Correct 938 ms 95868 KB Output is correct
16 Correct 872 ms 94256 KB Output is correct
17 Correct 1762 ms 104996 KB Output is correct
18 Correct 1389 ms 107280 KB Output is correct
19 Correct 1563 ms 111388 KB Output is correct
20 Correct 649 ms 93300 KB Output is correct
21 Correct 30 ms 43656 KB Output is correct
22 Correct 31 ms 44052 KB Output is correct
23 Correct 26 ms 44108 KB Output is correct
24 Correct 26 ms 43812 KB Output is correct
25 Correct 27 ms 44040 KB Output is correct
26 Correct 29 ms 43920 KB Output is correct
27 Correct 38 ms 44032 KB Output is correct
28 Correct 28 ms 44304 KB Output is correct
29 Correct 28 ms 43920 KB Output is correct
30 Correct 28 ms 44176 KB Output is correct
31 Correct 37 ms 44936 KB Output is correct
32 Correct 45 ms 45812 KB Output is correct
33 Correct 60 ms 46604 KB Output is correct
34 Correct 71 ms 47668 KB Output is correct
35 Correct 36 ms 45484 KB Output is correct
36 Correct 65 ms 48332 KB Output is correct
37 Correct 66 ms 47760 KB Output is correct
38 Correct 86 ms 49236 KB Output is correct
39 Correct 80 ms 47396 KB Output is correct
40 Correct 99 ms 48488 KB Output is correct
41 Correct 213 ms 56968 KB Output is correct
42 Correct 688 ms 82716 KB Output is correct
43 Correct 380 ms 65440 KB Output is correct
44 Correct 941 ms 104936 KB Output is correct
45 Correct 1244 ms 94660 KB Output is correct
46 Correct 577 ms 87972 KB Output is correct
47 Correct 815 ms 88612 KB Output is correct
48 Correct 624 ms 84444 KB Output is correct
49 Correct 548 ms 84836 KB Output is correct
50 Correct 605 ms 84508 KB Output is correct
51 Correct 308 ms 65748 KB Output is correct
52 Correct 799 ms 93724 KB Output is correct
53 Correct 629 ms 84988 KB Output is correct
54 Correct 1195 ms 99324 KB Output is correct
55 Correct 1336 ms 104064 KB Output is correct