oj.uz

Submission #736601

# Submission time Handle Problem Language Result Execution time Memory
736601 2023-05-06T02:06:57 Z becaido Parachute rings (IOI12_rings) C++17
100 / 100
 1962 ms 166212 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout(T t, U...u) {cout << t << (sizeof...(u) ? ", " : ""), dout(u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

const int SIZE = 1e6 + 5;

int n, mxdeg;
vector<int> adj[SIZE];

struct DS {
    int p, mxD;
    int cycle, csum;
    int to[SIZE], sz[SIZE], sum[SIZE], deg[SIZE], mxdeg[SIZE];
    void init() {
        mxD = cycle = csum = 0;
        iota(to + 1, to + n + 1, 1);
        fill(sz + 1, sz + n + 1, 1);
        fill(sum + 1, sum + n + 1, 0);
        fill(deg + 1, deg + n + 1, 0);
        fill(mxdeg + 1, mxdeg + n + 1, 0);
    }
    void build(int P = 0) {
        p = P;
        init();
        FOR (i, 1, n) for (int j : adj[i]) if (i < j) Merge(i, j);
    }
    int dsu(int x) {
        return x == to[x] ? x : (to[x] = dsu(to[x]));
    }
    void add(int x) {
        if (mxdeg[x] == 2 && sz[x] == sum[x]) cycle++, csum = sz[x];
        mxD = max(mxD, min(mxdeg[x], 4));
    }
    void del(int x) {
        if (mxdeg[x] == 2 && sz[x] == sum[x]) cycle--;
    }
    void Merge(int a, int b) {
        if (a == p || b == p) return;
        int da = dsu(a), db = dsu(b);
        if (da == db) del(da);
        else del(da), del(db);

        sum[da] -= deg[a] == 2;
        sum[db] -= deg[b] == 2;
        mxdeg[da] = max(mxdeg[da], ++deg[a]);
        mxdeg[db] = max(mxdeg[db], ++deg[b]);
        sum[da] += deg[a] == 2;
        sum[db] += deg[b] == 2;

        if (da == db) {
            add(da);
            return;
        }
        if (sz[da] < sz[db]) swap(da, db);
        to[db] = da;
        sz[da] += sz[db];
        sum[da] += sum[db];
        mxdeg[da] = max(mxdeg[da], mxdeg[db]);
        add(da);
    }
} ori, ds[4];

void Init(int N) {
    n = N;
    ori.build();
}

void Link(int a, int b) {
    a++, b++;
    adj[a].pb(b);
    adj[b].pb(a);
    ori.Merge(a, b);
    int cur = ori.mxD;
    if (cur == mxdeg + 1) {
        mxdeg = cur;
        if (cur == 4) {
            FOR (i, 1, n) if (adj[i].size() == 4) {
                ds[0].build(i);
                return;
            }
        }
        if (cur == 3) {
            FOR (i, 1, n) if (adj[i].size() == 3) {
                ds[0].build(i);
                int k = 0;
                for (int j : adj[i]) ds[++k].build(j);
                return;
            }
        }
    }
    mxdeg = cur;
    if (mxdeg == 4) ds[0].Merge(a, b);
    else if (mxdeg == 3) FOR (i, 0, 3) ds[i].Merge(a, b);
}

int CountCritical() {
    if (mxdeg <= 1) return n;
    if (mxdeg == 2) return ori.cycle == 0 ? n : ori.cycle == 1 ? ori.csum : 0;
    int ans = 0;
    debug(mxdeg, ori.mxD);
    FOR (i, 0, (mxdeg == 3 ? 3 : 0)) ans += ds[i].mxD <= 1 || (ds[i].mxD == 2 && ds[i].cycle == 0), debug(ans, i);
    return ans;
}

#ifdef WAIMAI
#define inbuf_len 1 << 16
#define outbuf_len 1 << 16
int main() {
  int tmp;

  /* Set input and output buffering */
  char *inbuf, *outbuf;
  inbuf = (char*) malloc(inbuf_len * sizeof(char));
  outbuf = (char*) malloc(outbuf_len * sizeof(char));
  tmp = setvbuf(stdin, inbuf, _IOFBF, inbuf_len);
  tmp = setvbuf(stdout, outbuf, _IOFBF, outbuf_len);

  int N, L;
  tmp = scanf("%d %d", &N, &L);
  assert(tmp == 2);
  Init(N);

  int i;
  for (i = 0; i < L; i++) {
    int A, B;
    tmp = scanf("%d", &A);
    if (A == -1) {
      int critical;
      critical = CountCritical();
      printf("%d\n", critical);
    } else {
      tmp = scanf("%d", &B);
      assert(tmp == 1);
      Link(A, B);
    }
  }

  return 0;

}
#endif

Compilation message

rings.cpp: In function 'int CountCritical()':
rings.cpp:12:20: warning: statement has no effect [-Wunused-value]
   12 | #define debug(...) 7122
      |                    ^~~~
rings.cpp:117:5: note: in expansion of macro 'debug'
  117 |     debug(mxdeg, ori.mxD);
      |     ^~~~~
rings.cpp:118:114: warning: right operand of comma operator has no effect [-Wunused-value]
  118 |     FOR (i, 0, (mxdeg == 3 ? 3 : 0)) ans += ds[i].mxD <= 1 || (ds[i].mxD == 2 && ds[i].cycle == 0), debug(ans, i);
      |                                                                                                                  ^

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23796 KB Output is correct
2 Correct 17 ms 24604 KB Output is correct
3 Correct 16 ms 24640 KB Output is correct
4 Correct 15 ms 23892 KB Output is correct
5 Correct 15 ms 24000 KB Output is correct
6 Correct 15 ms 24148 KB Output is correct
7 Correct 16 ms 24444 KB Output is correct
8 Correct 15 ms 24084 KB Output is correct
9 Correct 17 ms 24660 KB Output is correct
10 Correct 16 ms 24608 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 431 ms 56632 KB Output is correct
2 Correct 1305 ms 138000 KB Output is correct
3 Correct 1227 ms 161596 KB Output is correct
4 Correct 1042 ms 87968 KB Output is correct
5 Correct 1042 ms 88044 KB Output is correct
6 Correct 1004 ms 86648 KB Output is correct
7 Correct 1174 ms 160524 KB Output is correct
8 Correct 1867 ms 157260 KB Output is correct
9 Correct 1962 ms 166212 KB Output is correct
10 Correct 718 ms 85576 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23796 KB Output is correct
2 Correct 17 ms 24604 KB Output is correct
3 Correct 16 ms 24640 KB Output is correct
4 Correct 15 ms 23892 KB Output is correct
5 Correct 15 ms 24000 KB Output is correct
6 Correct 15 ms 24148 KB Output is correct
7 Correct 16 ms 24444 KB Output is correct
8 Correct 15 ms 24084 KB Output is correct
9 Correct 17 ms 24660 KB Output is correct
10 Correct 16 ms 24608 KB Output is correct
11 Correct 16 ms 24660 KB Output is correct
12 Correct 18 ms 25300 KB Output is correct
13 Correct 19 ms 25324 KB Output is correct
14 Correct 16 ms 25260 KB Output is correct
15 Correct 17 ms 26100 KB Output is correct
16 Correct 17 ms 24404 KB Output is correct
17 Correct 18 ms 25304 KB Output is correct
18 Correct 18 ms 26452 KB Output is correct
19 Correct 17 ms 24432 KB Output is correct
20 Correct 20 ms 25380 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23796 KB Output is correct
2 Correct 17 ms 24604 KB Output is correct
3 Correct 16 ms 24640 KB Output is correct
4 Correct 15 ms 23892 KB Output is correct
5 Correct 15 ms 24000 KB Output is correct
6 Correct 15 ms 24148 KB Output is correct
7 Correct 16 ms 24444 KB Output is correct
8 Correct 15 ms 24084 KB Output is correct
9 Correct 17 ms 24660 KB Output is correct
10 Correct 16 ms 24608 KB Output is correct
11 Correct 16 ms 24660 KB Output is correct
12 Correct 18 ms 25300 KB Output is correct
13 Correct 19 ms 25324 KB Output is correct
14 Correct 16 ms 25260 KB Output is correct
15 Correct 17 ms 26100 KB Output is correct
16 Correct 17 ms 24404 KB Output is correct
17 Correct 18 ms 25304 KB Output is correct
18 Correct 18 ms 26452 KB Output is correct
19 Correct 17 ms 24432 KB Output is correct
20 Correct 20 ms 25380 KB Output is correct
21 Correct 27 ms 26188 KB Output is correct
22 Correct 38 ms 27572 KB Output is correct
23 Correct 50 ms 28520 KB Output is correct
24 Correct 61 ms 35364 KB Output is correct
25 Correct 29 ms 34184 KB Output is correct
26 Correct 58 ms 36232 KB Output is correct
27 Correct 48 ms 29252 KB Output is correct
28 Correct 102 ms 36428 KB Output is correct
29 Correct 56 ms 35944 KB Output is correct
30 Correct 80 ms 30076 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 23796 KB Output is correct
2 Correct 17 ms 24604 KB Output is correct
3 Correct 16 ms 24640 KB Output is correct
4 Correct 15 ms 23892 KB Output is correct
5 Correct 15 ms 24000 KB Output is correct
6 Correct 15 ms 24148 KB Output is correct
7 Correct 16 ms 24444 KB Output is correct
8 Correct 15 ms 24084 KB Output is correct
9 Correct 17 ms 24660 KB Output is correct
10 Correct 16 ms 24608 KB Output is correct
11 Correct 431 ms 56632 KB Output is correct
12 Correct 1305 ms 138000 KB Output is correct
13 Correct 1227 ms 161596 KB Output is correct
14 Correct 1042 ms 87968 KB Output is correct
15 Correct 1042 ms 88044 KB Output is correct
16 Correct 1004 ms 86648 KB Output is correct
17 Correct 1174 ms 160524 KB Output is correct
18 Correct 1867 ms 157260 KB Output is correct
19 Correct 1962 ms 166212 KB Output is correct
20 Correct 718 ms 85576 KB Output is correct
21 Correct 16 ms 24660 KB Output is correct
22 Correct 18 ms 25300 KB Output is correct
23 Correct 19 ms 25324 KB Output is correct
24 Correct 16 ms 25260 KB Output is correct
25 Correct 17 ms 26100 KB Output is correct
26 Correct 17 ms 24404 KB Output is correct
27 Correct 18 ms 25304 KB Output is correct
28 Correct 18 ms 26452 KB Output is correct
29 Correct 17 ms 24432 KB Output is correct
30 Correct 20 ms 25380 KB Output is correct
31 Correct 27 ms 26188 KB Output is correct
32 Correct 38 ms 27572 KB Output is correct
33 Correct 50 ms 28520 KB Output is correct
34 Correct 61 ms 35364 KB Output is correct
35 Correct 29 ms 34184 KB Output is correct
36 Correct 58 ms 36232 KB Output is correct
37 Correct 48 ms 29252 KB Output is correct
38 Correct 102 ms 36428 KB Output is correct
39 Correct 56 ms 35944 KB Output is correct
40 Correct 80 ms 30076 KB Output is correct
41 Correct 221 ms 45760 KB Output is correct
42 Correct 811 ms 128740 KB Output is correct
43 Correct 291 ms 121420 KB Output is correct
44 Correct 849 ms 154604 KB Output is correct
45 Correct 956 ms 151040 KB Output is correct
46 Correct 688 ms 78164 KB Output is correct
47 Correct 927 ms 78984 KB Output is correct
48 Correct 630 ms 144548 KB Output is correct
49 Correct 658 ms 79376 KB Output is correct
50 Correct 693 ms 78828 KB Output is correct
51 Correct 315 ms 110252 KB Output is correct
52 Correct 1030 ms 128972 KB Output is correct
53 Correct 593 ms 144852 KB Output is correct
54 Correct 1641 ms 139392 KB Output is correct
55 Correct 1168 ms 149860 KB Output is correct