oj.uz

Submission #49513

# Submission time Handle Problem Language Result Execution time Memory
49513 2018-05-30T06:29:21 Z ho94949 Parachute rings (IOI12_rings) C++17
69 / 100
 1770 ms 92792 KB 
#include<vector>
#include<algorithm>
using namespace std;

const int MAXN = 1010101;

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)
                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:106:27: 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 25 ms 28024 KB Output is correct
2 Correct 48 ms 48000 KB Output is correct
3 Correct 51 ms 48000 KB Output is correct
4 Correct 26 ms 48000 KB Output is correct
5 Correct 28 ms 48000 KB Output is correct
6 Correct 32 ms 48000 KB Output is correct
7 Correct 54 ms 48020 KB Output is correct
8 Correct 27 ms 48020 KB Output is correct
9 Correct 58 ms 48180 KB Output is correct
10 Correct 67 ms 48180 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 522 ms 52836 KB Output is correct
2 Correct 1183 ms 81748 KB Output is correct
3 Correct 392 ms 81748 KB Output is correct
4 Correct 1398 ms 81748 KB Output is correct
5 Correct 1601 ms 81748 KB Output is correct
6 Correct 1639 ms 81748 KB Output is correct
7 Correct 377 ms 81748 KB Output is correct
8 Correct 1719 ms 88204 KB Output is correct
9 Correct 1770 ms 92792 KB Output is correct
10 Correct 995 ms 92792 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 28024 KB Output is correct
2 Correct 48 ms 48000 KB Output is correct
3 Correct 51 ms 48000 KB Output is correct
4 Correct 26 ms 48000 KB Output is correct
5 Correct 28 ms 48000 KB Output is correct
6 Correct 32 ms 48000 KB Output is correct
7 Correct 54 ms 48020 KB Output is correct
8 Correct 27 ms 48020 KB Output is correct
9 Correct 58 ms 48180 KB Output is correct
10 Correct 67 ms 48180 KB Output is correct
11 Correct 64 ms 92792 KB Output is correct
12 Correct 58 ms 92792 KB Output is correct
13 Correct 61 ms 92792 KB Output is correct
14 Correct 51 ms 92792 KB Output is correct
15 Correct 52 ms 92792 KB Output is correct
16 Correct 32 ms 92792 KB Output is correct
17 Correct 52 ms 92792 KB Output is correct
18 Correct 50 ms 92792 KB Output is correct
19 Correct 32 ms 92792 KB Output is correct
20 Correct 54 ms 92792 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 28024 KB Output is correct
2 Correct 48 ms 48000 KB Output is correct
3 Correct 51 ms 48000 KB Output is correct
4 Correct 26 ms 48000 KB Output is correct
5 Correct 28 ms 48000 KB Output is correct
6 Correct 32 ms 48000 KB Output is correct
7 Correct 54 ms 48020 KB Output is correct
8 Correct 27 ms 48020 KB Output is correct
9 Correct 58 ms 48180 KB Output is correct
10 Correct 67 ms 48180 KB Output is correct
11 Correct 64 ms 92792 KB Output is correct
12 Correct 58 ms 92792 KB Output is correct
13 Correct 61 ms 92792 KB Output is correct
14 Correct 51 ms 92792 KB Output is correct
15 Correct 52 ms 92792 KB Output is correct
16 Correct 32 ms 92792 KB Output is correct
17 Correct 52 ms 92792 KB Output is correct
18 Correct 50 ms 92792 KB Output is correct
19 Correct 32 ms 92792 KB Output is correct
20 Correct 54 ms 92792 KB Output is correct
21 Correct 62 ms 92792 KB Output is correct
22 Correct 63 ms 92792 KB Output is correct
23 Correct 87 ms 92792 KB Output is correct
24 Correct 98 ms 92792 KB Output is correct
25 Correct 61 ms 92792 KB Output is correct
26 Correct 98 ms 92792 KB Output is correct
27 Correct 117 ms 92792 KB Output is correct
28 Correct 102 ms 92792 KB Output is correct
29 Correct 74 ms 92792 KB Output is correct
30 Correct 99 ms 92792 KB Output is correct

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 28024 KB Output is correct
2 Correct 48 ms 48000 KB Output is correct
3 Correct 51 ms 48000 KB Output is correct
4 Correct 26 ms 48000 KB Output is correct
5 Correct 28 ms 48000 KB Output is correct
6 Correct 32 ms 48000 KB Output is correct
7 Correct 54 ms 48020 KB Output is correct
8 Correct 27 ms 48020 KB Output is correct
9 Correct 58 ms 48180 KB Output is correct
10 Correct 67 ms 48180 KB Output is correct
11 Correct 522 ms 52836 KB Output is correct
12 Correct 1183 ms 81748 KB Output is correct
13 Correct 392 ms 81748 KB Output is correct
14 Correct 1398 ms 81748 KB Output is correct
15 Correct 1601 ms 81748 KB Output is correct
16 Correct 1639 ms 81748 KB Output is correct
17 Correct 377 ms 81748 KB Output is correct
18 Correct 1719 ms 88204 KB Output is correct
19 Correct 1770 ms 92792 KB Output is correct
20 Correct 995 ms 92792 KB Output is correct
21 Correct 64 ms 92792 KB Output is correct
22 Correct 58 ms 92792 KB Output is correct
23 Correct 61 ms 92792 KB Output is correct
24 Correct 51 ms 92792 KB Output is correct
25 Correct 52 ms 92792 KB Output is correct
26 Correct 32 ms 92792 KB Output is correct
27 Correct 52 ms 92792 KB Output is correct
28 Correct 50 ms 92792 KB Output is correct
29 Correct 32 ms 92792 KB Output is correct
30 Correct 54 ms 92792 KB Output is correct
31 Correct 62 ms 92792 KB Output is correct
32 Correct 63 ms 92792 KB Output is correct
33 Correct 87 ms 92792 KB Output is correct
34 Correct 98 ms 92792 KB Output is correct
35 Correct 61 ms 92792 KB Output is correct
36 Correct 98 ms 92792 KB Output is correct
37 Correct 117 ms 92792 KB Output is correct
38 Correct 102 ms 92792 KB Output is correct
39 Correct 74 ms 92792 KB Output is correct
40 Correct 99 ms 92792 KB Output is correct
41 Correct 264 ms 92792 KB Output is correct
42 Correct 704 ms 92792 KB Output is correct
43 Correct 331 ms 92792 KB Output is correct
44 Correct 379 ms 92792 KB Output is correct
45 Incorrect 603 ms 92792 KB Output isn't correct
46 Halted 0 ms 0 KB -