oj.uz

Submission #49515

# Submission time Handle Problem Language Result Execution time Memory
49515 2018-05-30T06:34:01 Z ho94949 Parachute rings (IOI12_rings) C++17
69 / 100
 1705 ms 94628 KB 
#include<vector>
#include<algorithm>
using namespace std;

const int MAXN = 1048576;

struct UF
{
    int N;
    int ufd[MAXN];
    UF(){}
    UF(int n):N(n)
    {
        for(int i=0; i<n; ++i) ufd[i] = i;
    }
    int Find(int a)
    {
        if(a==ufd[a]) return a;
        return ufd[a] = Find(ufd[a]);
    }
    bool Union(int a, int b)
    {
        a = Find(a); b = Find(b);
        if(a==b) return false;
        ufd[a] = b; return true;
    }
};

struct DAT
{
    int N; UF uf; int numcyc; int cyclen;
    DAT(){};
    DAT(int n): N(n), uf(n), numcyc(0), cyclen(0){}
    void Add(int a, int b)
    {
        if(!uf.Union(a, b)) 
            if((++numcyc) == 1)
                for(int i=0; i<N; ++i)
                    if(uf.Find(i) == uf.Find(a))
                        ++cyclen;
    }
};
enum PHASE {DEG2, DEG3_1, DEG3_2, DEG3_3, SP1, INF};
PHASE state;

DAT global;


int N, M;
pair<int, int> EList[MAXN];
vector<int> conn[MAXN];
int deg[MAXN], numdeg[5];

vector<int> specials;
vector<DAT> datas;

void Init(int _N) {
    N = _N; M = 0; numdeg[0] = N;
    DAT d(N); global = d;
    state = DEG2;
}
void updatespecials()
{
    for(auto x: specials)
    {
        DAT d(N);
        for(int i=0; i<M; ++i)
        {
            if(EList[i].first == x || EList[i].second == x) continue;
            d.Add(EList[i].first, EList[i].second);
        }
        datas.push_back(d);
    }
}
void makestate(PHASE state)
{
    specials.clear(); datas.clear();
    if(numdeg[4] == 0)
    {
        for(int i=0; i<N; ++i)
        {
            int cnt = (deg[i] >= 3)?1:0;
            for(auto x: conn[i])
                if(deg[x] >= 3) ++cnt;
            if(cnt == numdeg[3] + numdeg[4])
                specials.push_back(i);
        }
    }
    else
    {
        for(int i=0; i<N; ++i)
            if(deg[i] >= 4)
            {
                int cnt = 1;
                for(auto x: conn[i])
                    if(deg[x] >= 3) ++cnt;
                if(cnt == numdeg[3] + numdeg[4])
                    specials.push_back(i);
            }
    }
    updatespecials();
}

void updatestate(PHASE state, int A, int B)
{
    switch(state)
    {
        case DEG2:
            global.Add(A, B);
            break;
        default:
            for(int i=0; i<specials.size(); ++i)
            {
                if(specials[i] == A || specials[i] == B) continue;
                datas[i].Add(A, B);
            }
            break;
    }
}

void Link(int A, int B) {
    if(state == INF) return;
    EList[M++] = make_pair(A, B);
    numdeg[min(4, deg[A])]--; numdeg[min(4, deg[B])]--;
    deg[A]++; deg[B]++;
    numdeg[min(4, deg[A])]++; numdeg[min(4, deg[B])]++;
    conn[A].push_back(B);
    conn[B].push_back(A);
    
    PHASE newstate = DEG2;
    if(numdeg[4] >= 2){ state = INF; return;}
    else if(numdeg[4] == 1 || numdeg[3] >= 4) newstate = SP1;
    else if(numdeg[3] == 3) newstate = DEG3_3;
    else if(numdeg[3] == 2) newstate = DEG3_2;
    else if(numdeg[3] == 1) newstate = DEG3_1;
    else newstate = DEG2;
    if(state != newstate)
    {
        state = newstate;
        makestate(state);
    }
    else updatestate(state, A, B);
}
#include<cstdio>
int CountCritical() {
    //if(state == DEG2) puts("DEG2");
    //printf(">%d %d\n", state, (int)datas.size());
    int ans = 0;
    switch(state)
    {
    case DEG2:
        switch(global.numcyc)
        {
            case 0: return N;
            case 1: return global.cyclen;
            default: return 0;
        }
    case INF:
        return 0;
    default:
        for(const auto& x: datas)
            if(x.numcyc==0) ++ans;
        return ans;
    }
}

Compilation message

rings.cpp: In function 'void updatestate(PHASE, int, int)':
rings.cpp:112:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int i=0; i<specials.size(); ++i)
                          ~^~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 29048 KB Output is correct
2 Correct 48 ms 49840 KB Output is correct
3 Correct 51 ms 49844 KB Output is correct
4 Correct 28 ms 49844 KB Output is correct
5 Correct 33 ms 49844 KB Output is correct
6 Correct 29 ms 49844 KB Output is correct
7 Correct 47 ms 49884 KB Output is correct
8 Correct 34 ms 49884 KB Output is correct
9 Correct 52 ms 50012 KB Output is correct
10 Correct 63 ms 50028 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 499 ms 53824 KB Output is correct
2 Correct 1170 ms 83420 KB Output is correct
3 Correct 385 ms 83420 KB Output is correct
4 Correct 1351 ms 83420 KB Output is correct
5 Correct 1396 ms 83420 KB Output is correct
6 Correct 1353 ms 83420 KB Output is correct
7 Correct 366 ms 83420 KB Output is correct
8 Correct 1539 ms 89788 KB Output is correct
9 Correct 1705 ms 94628 KB Output is correct
10 Correct 947 ms 94628 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 29048 KB Output is correct
2 Correct 48 ms 49840 KB Output is correct
3 Correct 51 ms 49844 KB Output is correct
4 Correct 28 ms 49844 KB Output is correct
5 Correct 33 ms 49844 KB Output is correct
6 Correct 29 ms 49844 KB Output is correct
7 Correct 47 ms 49884 KB Output is correct
8 Correct 34 ms 49884 KB Output is correct
9 Correct 52 ms 50012 KB Output is correct
10 Correct 63 ms 50028 KB Output is correct
11 Correct 51 ms 94628 KB Output is correct
12 Correct 53 ms 94628 KB Output is correct
13 Correct 57 ms 94628 KB Output is correct
14 Correct 55 ms 94628 KB Output is correct
15 Correct 49 ms 94628 KB Output is correct
16 Correct 31 ms 94628 KB Output is correct
17 Correct 52 ms 94628 KB Output is correct
18 Correct 55 ms 94628 KB Output is correct
19 Correct 32 ms 94628 KB Output is correct
20 Correct 55 ms 94628 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 29048 KB Output is correct
2 Correct 48 ms 49840 KB Output is correct
3 Correct 51 ms 49844 KB Output is correct
4 Correct 28 ms 49844 KB Output is correct
5 Correct 33 ms 49844 KB Output is correct
6 Correct 29 ms 49844 KB Output is correct
7 Correct 47 ms 49884 KB Output is correct
8 Correct 34 ms 49884 KB Output is correct
9 Correct 52 ms 50012 KB Output is correct
10 Correct 63 ms 50028 KB Output is correct
11 Correct 51 ms 94628 KB Output is correct
12 Correct 53 ms 94628 KB Output is correct
13 Correct 57 ms 94628 KB Output is correct
14 Correct 55 ms 94628 KB Output is correct
15 Correct 49 ms 94628 KB Output is correct
16 Correct 31 ms 94628 KB Output is correct
17 Correct 52 ms 94628 KB Output is correct
18 Correct 55 ms 94628 KB Output is correct
19 Correct 32 ms 94628 KB Output is correct
20 Correct 55 ms 94628 KB Output is correct
21 Correct 51 ms 94628 KB Output is correct
22 Correct 64 ms 94628 KB Output is correct
23 Correct 76 ms 94628 KB Output is correct
24 Correct 98 ms 94628 KB Output is correct
25 Correct 64 ms 94628 KB Output is correct
26 Correct 101 ms 94628 KB Output is correct
27 Correct 84 ms 94628 KB Output is correct
28 Correct 109 ms 94628 KB Output is correct
29 Correct 78 ms 94628 KB Output is correct
30 Correct 99 ms 94628 KB Output is correct

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 29048 KB Output is correct
2 Correct 48 ms 49840 KB Output is correct
3 Correct 51 ms 49844 KB Output is correct
4 Correct 28 ms 49844 KB Output is correct
5 Correct 33 ms 49844 KB Output is correct
6 Correct 29 ms 49844 KB Output is correct
7 Correct 47 ms 49884 KB Output is correct
8 Correct 34 ms 49884 KB Output is correct
9 Correct 52 ms 50012 KB Output is correct
10 Correct 63 ms 50028 KB Output is correct
11 Correct 499 ms 53824 KB Output is correct
12 Correct 1170 ms 83420 KB Output is correct
13 Correct 385 ms 83420 KB Output is correct
14 Correct 1351 ms 83420 KB Output is correct
15 Correct 1396 ms 83420 KB Output is correct
16 Correct 1353 ms 83420 KB Output is correct
17 Correct 366 ms 83420 KB Output is correct
18 Correct 1539 ms 89788 KB Output is correct
19 Correct 1705 ms 94628 KB Output is correct
20 Correct 947 ms 94628 KB Output is correct
21 Correct 51 ms 94628 KB Output is correct
22 Correct 53 ms 94628 KB Output is correct
23 Correct 57 ms 94628 KB Output is correct
24 Correct 55 ms 94628 KB Output is correct
25 Correct 49 ms 94628 KB Output is correct
26 Correct 31 ms 94628 KB Output is correct
27 Correct 52 ms 94628 KB Output is correct
28 Correct 55 ms 94628 KB Output is correct
29 Correct 32 ms 94628 KB Output is correct
30 Correct 55 ms 94628 KB Output is correct
31 Correct 51 ms 94628 KB Output is correct
32 Correct 64 ms 94628 KB Output is correct
33 Correct 76 ms 94628 KB Output is correct
34 Correct 98 ms 94628 KB Output is correct
35 Correct 64 ms 94628 KB Output is correct
36 Correct 101 ms 94628 KB Output is correct
37 Correct 84 ms 94628 KB Output is correct
38 Correct 109 ms 94628 KB Output is correct
39 Correct 78 ms 94628 KB Output is correct
40 Correct 99 ms 94628 KB Output is correct
41 Correct 287 ms 94628 KB Output is correct
42 Correct 692 ms 94628 KB Output is correct
43 Correct 334 ms 94628 KB Output is correct
44 Correct 379 ms 94628 KB Output is correct
45 Incorrect 611 ms 94628 KB Output isn't correct
46 Halted 0 ms 0 KB -