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Submission #426279

# Submission time Handle Problem Language Result Execution time Memory
426279 2021-06-13T16:35:29 Z wiwiho Parachute rings (IOI12_rings) C++14
100 / 100
 2752 ms 154520 KB 
#include <bits/stdc++.h>
#include <bits/extc++.h>

#define StarBurstStream ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define iter(a) a.begin(), a.end()
#define riter(a) a.rbegin(), a.rend()
#define lsort(a) sort(iter(a))
#define gsort(a) sort(riter(a))
#define pb(a) push_back(a)
#define eb(a) emplace_back(a)
#define pf(a) push_front(a)
#define ef(a) emplace_front(a)
#define pob pop_back()
#define pof pop_front()
#define mp(a, b) make_pair(a, b)
#define F first
#define S second
#define mt make_tuple
#define gt(t, i) get<i>(t)
#define tomax(a, b) ((a) = max((a), (b)))
#define tomin(a, b) ((a) = min((a), (b)))
#define topos(a) ((a) = (((a) % MOD + MOD) % MOD))
#define uni(a) a.resize(unique(iter(a)) - a.begin())
#define printv(a, b) {bool pvaspace=false; \
for(auto pva : a){ \
    if(pvaspace) b << " "; pvaspace=true;\
    b << pva;\
}\
b << "\n";}

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<ld, ld>;
using tiii = tuple<int, int, int>;

const ll MOD = 1000000007;
const ll MAX = 2147483647;

template<typename A, typename B>
ostream& operator<<(ostream& o, pair<A, B> p){
    return o << '(' << p.F << ',' << p.S << ')';
}

ll ifloor(ll a, ll b){
    if(b < 0) a *= -1, b *= -1;
    if(a < 0) return (a - b + 1) / b;
    else return a / b;
}

ll iceil(ll a, ll b){
    if(b < 0) a *= -1, b *= -1;
    if(a > 0) return (a + b - 1) / b;
    else return a / b;
}

int n = -1;
vector<pii> edge;
vector<vector<int>> g;

struct DSU{
    vector<int> dsu;
    vector<int> deg, cnt, one, sz;
    int cycle = -1;
    int con = 0;
    void init(){
        con = n;
        cnt.resize(4);
        dsu.resize(n);
        deg.resize(n);
        one.resize(n);
        sz.resize(n, 1);
        cnt[0] = n;
        for(int i = 0; i < n; i++) dsu[i] = i;
    }
    int findDSU(int a){
        if(dsu[a] != a) dsu[a] = findDSU(dsu[a]);
        return dsu[a];
    }
    void unionDSU(int a, int b){
        int pa = findDSU(a);
        int pb = findDSU(b);
        if(deg[a] == 1) one[pa]--;
        if(deg[b] == 1) one[pb]--;
        cnt[min(deg[a], 3)]--;
        cnt[min(deg[b], 3)]--;
        if(pa != pb){
            dsu[pb] = pa;
            con--;
            one[pa] += one[pb];
            sz[pa] += sz[pb];
        }
        deg[a]++; deg[b]++;
        if(deg[a] == 1) one[pa]++;
        if(deg[b] == 1) one[pa]++;
        cnt[min(deg[a], 3)]++;
        cnt[min(deg[b], 3)]++;
        if(sz[pa] > 1 && one[pa] == 0) cycle = sz[pa];
    }
    bool ok(){
        return cnt[3] == 0 && cnt[1] == (con - cnt[0]) * 2;
    }
    int cy(){
        if(cnt[3] != 0 || cnt[1] + 2 != (con - cnt[0]) * 2) return -1;
        return cycle;
    }
    void print(){
        cerr << "DSU " << ok() << " " << cy() << " " << con << "\n";
        cerr << "dsu: ";
        printv(dsu, cerr);
        cerr << "sz: ";
        printv(sz, cerr);
        cerr << "cnt: ";
        printv(cnt, cerr);
        cerr << "deg: ";
        printv(deg, cerr);
    }
};

struct OAO{
    int no;
    DSU dsu;
    explicit OAO(int no = -1): no(no) {
        if(n != -1) dsu.init();
        for(pii p : edge){
            addedge(p.F, p.S);
        }
    }
    void addedge(int u, int v){
        if(u == no || v == no) return;
        dsu.unionDSU(u, v);
    }
};

OAO all;
vector<OAO> oao;
int status = 0;

void neighbor(int v){
    if(status >= 1) return;
    status = 1;
    oao.clear();
    oao.eb(OAO(v));
    for(int i : g[v]) oao.eb(OAO(i));
}

void only(int v){
    if(status >= 2) return;
    status = 2;
    oao.clear();
    oao.eb(OAO(v));
}

void addedge(int u, int v){
    g[u].eb(v);
    g[v].eb(u);
    edge.eb(mp(u, v));
    all.addedge(u, v);
    for(OAO& oao : oao) oao.addedge(u, v);
    if(g[u].size() == 3) neighbor(u);
    if(g[u].size() == 4) only(u);
    if(g[v].size() == 3) neighbor(v);
    if(g[v].size() == 4) only(v);
}

void Init(int N){
    n = N;
    all.dsu.init();
    g.resize(n);
}

void Link(int u, int v){
    addedge(u, v);
}

int CountCritical(){
//    cerr << "test\n";
//    all.dsu.print();
//    for(OAO& t : oao){
//        cerr << "test " << t.no << "\n";
//        t.dsu.print();
//    }
    if(all.dsu.ok()) return n;
    else if(all.dsu.cy() != -1) return all.dsu.cy();
    int ans = 0;
    for(OAO& t : oao) ans += t.dsu.ok();
    return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 4 ms 844 KB Output is correct
3 Correct 3 ms 844 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 572 KB Output is correct
6 Correct 3 ms 716 KB Output is correct
7 Correct 2 ms 844 KB Output is correct
8 Correct 2 ms 588 KB Output is correct
9 Correct 4 ms 1100 KB Output is correct
10 Correct 4 ms 1100 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 533 ms 42140 KB Output is correct
2 Correct 1813 ms 100332 KB Output is correct
3 Correct 2055 ms 103244 KB Output is correct
4 Correct 1414 ms 79624 KB Output is correct
5 Correct 1425 ms 91960 KB Output is correct
6 Correct 1393 ms 90156 KB Output is correct
7 Correct 1930 ms 104096 KB Output is correct
8 Correct 2490 ms 144480 KB Output is correct
9 Correct 2752 ms 154520 KB Output is correct
10 Correct 981 ms 89872 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 4 ms 844 KB Output is correct
3 Correct 3 ms 844 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 572 KB Output is correct
6 Correct 3 ms 716 KB Output is correct
7 Correct 2 ms 844 KB Output is correct
8 Correct 2 ms 588 KB Output is correct
9 Correct 4 ms 1100 KB Output is correct
10 Correct 4 ms 1100 KB Output is correct
11 Correct 5 ms 1100 KB Output is correct
12 Correct 8 ms 1848 KB Output is correct
13 Correct 8 ms 1868 KB Output is correct
14 Correct 5 ms 1356 KB Output is correct
15 Correct 5 ms 2380 KB Output is correct
16 Correct 5 ms 1228 KB Output is correct
17 Correct 8 ms 1816 KB Output is correct
18 Correct 7 ms 2508 KB Output is correct
19 Correct 8 ms 1228 KB Output is correct
20 Correct 8 ms 1868 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 4 ms 844 KB Output is correct
3 Correct 3 ms 844 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 572 KB Output is correct
6 Correct 3 ms 716 KB Output is correct
7 Correct 2 ms 844 KB Output is correct
8 Correct 2 ms 588 KB Output is correct
9 Correct 4 ms 1100 KB Output is correct
10 Correct 4 ms 1100 KB Output is correct
11 Correct 5 ms 1100 KB Output is correct
12 Correct 8 ms 1848 KB Output is correct
13 Correct 8 ms 1868 KB Output is correct
14 Correct 5 ms 1356 KB Output is correct
15 Correct 5 ms 2380 KB Output is correct
16 Correct 5 ms 1228 KB Output is correct
17 Correct 8 ms 1816 KB Output is correct
18 Correct 7 ms 2508 KB Output is correct
19 Correct 8 ms 1228 KB Output is correct
20 Correct 8 ms 1868 KB Output is correct
21 Correct 20 ms 3784 KB Output is correct
22 Correct 33 ms 5892 KB Output is correct
23 Correct 43 ms 7444 KB Output is correct
24 Correct 67 ms 10060 KB Output is correct
25 Correct 21 ms 10628 KB Output is correct
26 Correct 60 ms 10316 KB Output is correct
27 Correct 51 ms 7932 KB Output is correct
28 Correct 150 ms 13788 KB Output is correct
29 Correct 63 ms 11332 KB Output is correct
30 Correct 64 ms 9108 KB Output is correct

Subtask #5
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 4 ms 844 KB Output is correct
3 Correct 3 ms 844 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 2 ms 572 KB Output is correct
6 Correct 3 ms 716 KB Output is correct
7 Correct 2 ms 844 KB Output is correct
8 Correct 2 ms 588 KB Output is correct
9 Correct 4 ms 1100 KB Output is correct
10 Correct 4 ms 1100 KB Output is correct
11 Correct 533 ms 42140 KB Output is correct
12 Correct 1813 ms 100332 KB Output is correct
13 Correct 2055 ms 103244 KB Output is correct
14 Correct 1414 ms 79624 KB Output is correct
15 Correct 1425 ms 91960 KB Output is correct
16 Correct 1393 ms 90156 KB Output is correct
17 Correct 1930 ms 104096 KB Output is correct
18 Correct 2490 ms 144480 KB Output is correct
19 Correct 2752 ms 154520 KB Output is correct
20 Correct 981 ms 89872 KB Output is correct
21 Correct 5 ms 1100 KB Output is correct
22 Correct 8 ms 1848 KB Output is correct
23 Correct 8 ms 1868 KB Output is correct
24 Correct 5 ms 1356 KB Output is correct
25 Correct 5 ms 2380 KB Output is correct
26 Correct 5 ms 1228 KB Output is correct
27 Correct 8 ms 1816 KB Output is correct
28 Correct 7 ms 2508 KB Output is correct
29 Correct 8 ms 1228 KB Output is correct
30 Correct 8 ms 1868 KB Output is correct
31 Correct 20 ms 3784 KB Output is correct
32 Correct 33 ms 5892 KB Output is correct
33 Correct 43 ms 7444 KB Output is correct
34 Correct 67 ms 10060 KB Output is correct
35 Correct 21 ms 10628 KB Output is correct
36 Correct 60 ms 10316 KB Output is correct
37 Correct 51 ms 7932 KB Output is correct
38 Correct 150 ms 13788 KB Output is correct
39 Correct 63 ms 11332 KB Output is correct
40 Correct 64 ms 9108 KB Output is correct
41 Correct 269 ms 33508 KB Output is correct
42 Correct 1102 ms 111852 KB Output is correct
43 Correct 363 ms 94684 KB Output is correct
44 Correct 1280 ms 97940 KB Output is correct
45 Correct 1558 ms 109992 KB Output is correct
46 Correct 893 ms 76672 KB Output is correct
47 Correct 1287 ms 78072 KB Output is correct
48 Correct 778 ms 103956 KB Output is correct
49 Correct 813 ms 80940 KB Output is correct
50 Correct 993 ms 79932 KB Output is correct
51 Correct 434 ms 80828 KB Output is correct
52 Correct 1942 ms 113892 KB Output is correct
53 Correct 806 ms 104672 KB Output is correct
54 Correct 2663 ms 125128 KB Output is correct
55 Correct 1653 ms 95144 KB Output is correct