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답안 #655784

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
655784 2022-11-05T14:44:23 Z aZvezda Mergers (JOI19_mergers) C++14
100 / 100
 774 ms 79416 KB 
#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#define endl "\n"
typedef long long ll;
template<class T, class T2> inline ostream &operator <<(ostream &out, const pair<T, T2> &x) { out << x.first << " " << x.second; return out;}
template<class T, class T2> inline istream &operator >>(istream &in, pair<T, T2> &x) { in >> x.first >> x.second; return in;}
template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const ll mod = 1e9 + 7;
#define out(x) "{" << (#x) << ": " << x << "} "

const int MAX_N = 5e5 + 10;
void *arenaPtr;
size_t arenaSize;
template<class T>
struct MyAllocator {
    typedef T value_type;

    MyAllocator () = default;
    template<class U>
    constexpr MyAllocator (const MyAllocator <U>&) noexcept {}

	T* allocate(size_t n) {
		const auto ret = (T*)((char*)arenaPtr + arenaSize);
		arenaSize += n * sizeof(T);
		return ret;
    }
	void deallocate(T* p, size_t n) {
    	return;
	}
};

vector<int , MyAllocator<int> > g[MAX_N], nw[MAX_N];
int cnt[MAX_N], cntNow[MAX_N], col[MAX_N];
int n, k, ret;
int sz[MAX_N], big[MAX_N];
int cntok;

void count(int x, int delta = 1) {
    if(cntNow[col[x]] == 0 || cntNow[col[x]] == cnt[col[x]]) {
        cntok --;
    }
    cntNow[col[x]] += delta;
    if(cntNow[col[x]] == 0 || cntNow[col[x]] == cnt[col[x]]) {
        cntok ++;
    }
}

void add(int x, int p, int delta = 1) {
    count(x, delta);
    for(auto it : g[x]) {
        if(it == p) {continue;}
        add(it, x, delta);
    }
}

void calcSize(int x, int p) {
    sz[x] = 1;
    big[x] = 0;
    for(auto it : g[x]) {
        if(it == p) {continue;}
        calcSize(it, x);
        sz[x] += sz[it];
        if(sz[it] > sz[big[x]]) {
            big[x] = it;
        }
    }
}

vector<int, MyAllocator<int> > stck;
void dfs(int x, int p, bool keep = true) {
    int topRet = stck.size();

    for(auto it : g[x]) {
        if(it == p || it == big[x]) {continue;}
        dfs(it, x, false);
    }
    if(big[x] != 0) {
        dfs(big[x], x, true);
    }

    for(auto it : g[x]) {
        if(it == p || it == big[x]) {continue;}
        add(it, x, 1);
    }
    count(x);

    if(cntok == k) {
        while(stck.size() > topRet) {
            nw[x].push_back(stck.back());
            stck.pop_back();
        }
        stck.push_back(x);
    }

    if(!keep) {
        add(x, p, -1);
    }
}

void calc(int x, int d) {
    if(x == 1 && nw[x].size() == 1) {
        ret ++;
    } else if(nw[x].size() == 0) {
        ret ++;
    }
    for(auto it : nw[x]) {
        calc(it, d + 1);
    }
}

signed main() {
	arenaPtr = malloc(MAX_N * 1000);
	arenaSize = 0;

	ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    cin >> n >> k;
    cntok = k;
    for(int i = 0; i < n - 1; i ++) {
        int a, b;
        cin >> a >> b;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    for(int i = 1; i <= n; i ++) {
        cin >> col[i];
        cnt[col[i]] ++;
    }
    calcSize(1, 0);
    dfs(1, 0, 1);
    calc(1, 0);
    if(ret != 1) {
        cout << (ret + 1) / 2 << endl;
    } else {
        cout << 0 << endl;
    }

	free(arenaPtr);
    return 0;
}

Compilation message

mergers.cpp: In function 'void dfs(int, int, bool)':
mergers.cpp:91:27: warning: comparison of integer expressions of different signedness: 'std::vector<int, MyAllocator<int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   91 |         while(stck.size() > topRet) {
      |               ~~~~~~~~~~~~^~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 10 ms 23836 KB Output is correct
3 Correct 10 ms 23800 KB Output is correct
4 Correct 10 ms 23764 KB Output is correct
5 Correct 10 ms 23764 KB Output is correct
6 Correct 10 ms 23764 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23764 KB Output is correct
9 Correct 10 ms 23764 KB Output is correct
10 Correct 11 ms 23828 KB Output is correct
11 Correct 10 ms 23864 KB Output is correct
12 Correct 10 ms 23844 KB Output is correct
13 Correct 10 ms 23812 KB Output is correct
14 Correct 10 ms 23836 KB Output is correct
15 Correct 10 ms 23764 KB Output is correct
16 Correct 9 ms 23832 KB Output is correct
17 Correct 10 ms 23764 KB Output is correct
18 Correct 11 ms 23756 KB Output is correct
19 Correct 10 ms 23764 KB Output is correct
20 Correct 10 ms 23780 KB Output is correct
21 Correct 10 ms 23836 KB Output is correct
22 Correct 10 ms 23832 KB Output is correct
23 Correct 11 ms 23796 KB Output is correct
24 Correct 11 ms 23764 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 10 ms 23836 KB Output is correct
3 Correct 10 ms 23800 KB Output is correct
4 Correct 10 ms 23764 KB Output is correct
5 Correct 10 ms 23764 KB Output is correct
6 Correct 10 ms 23764 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23764 KB Output is correct
9 Correct 10 ms 23764 KB Output is correct
10 Correct 11 ms 23828 KB Output is correct
11 Correct 10 ms 23864 KB Output is correct
12 Correct 10 ms 23844 KB Output is correct
13 Correct 10 ms 23812 KB Output is correct
14 Correct 10 ms 23836 KB Output is correct
15 Correct 10 ms 23764 KB Output is correct
16 Correct 9 ms 23832 KB Output is correct
17 Correct 10 ms 23764 KB Output is correct
18 Correct 11 ms 23756 KB Output is correct
19 Correct 10 ms 23764 KB Output is correct
20 Correct 10 ms 23780 KB Output is correct
21 Correct 10 ms 23836 KB Output is correct
22 Correct 10 ms 23832 KB Output is correct
23 Correct 11 ms 23796 KB Output is correct
24 Correct 11 ms 23764 KB Output is correct
25 Correct 11 ms 23764 KB Output is correct
26 Correct 11 ms 23968 KB Output is correct
27 Correct 11 ms 23976 KB Output is correct
28 Correct 11 ms 24148 KB Output is correct
29 Correct 11 ms 24020 KB Output is correct
30 Correct 11 ms 23968 KB Output is correct
31 Correct 10 ms 23852 KB Output is correct
32 Correct 11 ms 24148 KB Output is correct
33 Correct 10 ms 23764 KB Output is correct
34 Correct 10 ms 23892 KB Output is correct
35 Correct 11 ms 23952 KB Output is correct
36 Correct 11 ms 23892 KB Output is correct
37 Correct 11 ms 23892 KB Output is correct
38 Correct 10 ms 23832 KB Output is correct
39 Correct 12 ms 23872 KB Output is correct
40 Correct 11 ms 23972 KB Output is correct
41 Correct 11 ms 23924 KB Output is correct
42 Correct 11 ms 23976 KB Output is correct
43 Correct 10 ms 24148 KB Output is correct
44 Correct 10 ms 23788 KB Output is correct
45 Correct 11 ms 24020 KB Output is correct
46 Correct 11 ms 23972 KB Output is correct
47 Correct 11 ms 23844 KB Output is correct
48 Correct 12 ms 24084 KB Output is correct
49 Correct 12 ms 24016 KB Output is correct
50 Correct 14 ms 24024 KB Output is correct
51 Correct 11 ms 23892 KB Output is correct
52 Correct 11 ms 23892 KB Output is correct
53 Correct 11 ms 23892 KB Output is correct
54 Correct 11 ms 23892 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 10 ms 23836 KB Output is correct
3 Correct 10 ms 23800 KB Output is correct
4 Correct 10 ms 23764 KB Output is correct
5 Correct 10 ms 23764 KB Output is correct
6 Correct 10 ms 23764 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23764 KB Output is correct
9 Correct 10 ms 23764 KB Output is correct
10 Correct 11 ms 23828 KB Output is correct
11 Correct 10 ms 23864 KB Output is correct
12 Correct 10 ms 23844 KB Output is correct
13 Correct 10 ms 23812 KB Output is correct
14 Correct 10 ms 23836 KB Output is correct
15 Correct 10 ms 23764 KB Output is correct
16 Correct 9 ms 23832 KB Output is correct
17 Correct 10 ms 23764 KB Output is correct
18 Correct 11 ms 23756 KB Output is correct
19 Correct 10 ms 23764 KB Output is correct
20 Correct 10 ms 23780 KB Output is correct
21 Correct 10 ms 23836 KB Output is correct
22 Correct 10 ms 23832 KB Output is correct
23 Correct 11 ms 23796 KB Output is correct
24 Correct 11 ms 23764 KB Output is correct
25 Correct 10 ms 23764 KB Output is correct
26 Correct 42 ms 27648 KB Output is correct
27 Correct 66 ms 27724 KB Output is correct
28 Correct 11 ms 23892 KB Output is correct
29 Correct 10 ms 23764 KB Output is correct
30 Correct 9 ms 23764 KB Output is correct
31 Correct 71 ms 27848 KB Output is correct
32 Correct 11 ms 23892 KB Output is correct
33 Correct 51 ms 36232 KB Output is correct
34 Correct 70 ms 27732 KB Output is correct
35 Correct 12 ms 23872 KB Output is correct
36 Correct 64 ms 28624 KB Output is correct
37 Correct 12 ms 23892 KB Output is correct
38 Correct 12 ms 23908 KB Output is correct
39 Correct 39 ms 27596 KB Output is correct
40 Correct 11 ms 24220 KB Output is correct
41 Correct 68 ms 27668 KB Output is correct
42 Correct 58 ms 30412 KB Output is correct
43 Correct 10 ms 23828 KB Output is correct
44 Correct 59 ms 36500 KB Output is correct
45 Correct 51 ms 32476 KB Output is correct
46 Correct 11 ms 23892 KB Output is correct
47 Correct 11 ms 23968 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 40 ms 27676 KB Output is correct
2 Correct 45 ms 30580 KB Output is correct
3 Correct 11 ms 23892 KB Output is correct
4 Correct 11 ms 23892 KB Output is correct
5 Correct 9 ms 23764 KB Output is correct
6 Correct 10 ms 23828 KB Output is correct
7 Correct 10 ms 23884 KB Output is correct
8 Correct 85 ms 28584 KB Output is correct
9 Correct 12 ms 23884 KB Output is correct
10 Correct 68 ms 27896 KB Output is correct
11 Correct 10 ms 23764 KB Output is correct
12 Correct 69 ms 27740 KB Output is correct
13 Correct 84 ms 28628 KB Output is correct
14 Correct 92 ms 29676 KB Output is correct
15 Correct 39 ms 27596 KB Output is correct
16 Correct 11 ms 23940 KB Output is correct
17 Correct 10 ms 23740 KB Output is correct
18 Correct 46 ms 30412 KB Output is correct
19 Correct 72 ms 33804 KB Output is correct
20 Correct 12 ms 23892 KB Output is correct
21 Correct 10 ms 23820 KB Output is correct
22 Correct 44 ms 28700 KB Output is correct
23 Correct 12 ms 23892 KB Output is correct
24 Correct 80 ms 27988 KB Output is correct
25 Correct 70 ms 33272 KB Output is correct
26 Correct 11 ms 23964 KB Output is correct
27 Correct 11 ms 24020 KB Output is correct
28 Correct 12 ms 23972 KB Output is correct
29 Correct 11 ms 23892 KB Output is correct
30 Correct 11 ms 23884 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 23764 KB Output is correct
2 Correct 10 ms 23836 KB Output is correct
3 Correct 10 ms 23800 KB Output is correct
4 Correct 10 ms 23764 KB Output is correct
5 Correct 10 ms 23764 KB Output is correct
6 Correct 10 ms 23764 KB Output is correct
7 Correct 10 ms 23764 KB Output is correct
8 Correct 10 ms 23764 KB Output is correct
9 Correct 10 ms 23764 KB Output is correct
10 Correct 11 ms 23828 KB Output is correct
11 Correct 10 ms 23864 KB Output is correct
12 Correct 10 ms 23844 KB Output is correct
13 Correct 10 ms 23812 KB Output is correct
14 Correct 10 ms 23836 KB Output is correct
15 Correct 10 ms 23764 KB Output is correct
16 Correct 9 ms 23832 KB Output is correct
17 Correct 10 ms 23764 KB Output is correct
18 Correct 11 ms 23756 KB Output is correct
19 Correct 10 ms 23764 KB Output is correct
20 Correct 10 ms 23780 KB Output is correct
21 Correct 10 ms 23836 KB Output is correct
22 Correct 10 ms 23832 KB Output is correct
23 Correct 11 ms 23796 KB Output is correct
24 Correct 11 ms 23764 KB Output is correct
25 Correct 11 ms 23764 KB Output is correct
26 Correct 11 ms 23968 KB Output is correct
27 Correct 11 ms 23976 KB Output is correct
28 Correct 11 ms 24148 KB Output is correct
29 Correct 11 ms 24020 KB Output is correct
30 Correct 11 ms 23968 KB Output is correct
31 Correct 10 ms 23852 KB Output is correct
32 Correct 11 ms 24148 KB Output is correct
33 Correct 10 ms 23764 KB Output is correct
34 Correct 10 ms 23892 KB Output is correct
35 Correct 11 ms 23952 KB Output is correct
36 Correct 11 ms 23892 KB Output is correct
37 Correct 11 ms 23892 KB Output is correct
38 Correct 10 ms 23832 KB Output is correct
39 Correct 12 ms 23872 KB Output is correct
40 Correct 11 ms 23972 KB Output is correct
41 Correct 11 ms 23924 KB Output is correct
42 Correct 11 ms 23976 KB Output is correct
43 Correct 10 ms 24148 KB Output is correct
44 Correct 10 ms 23788 KB Output is correct
45 Correct 11 ms 24020 KB Output is correct
46 Correct 11 ms 23972 KB Output is correct
47 Correct 11 ms 23844 KB Output is correct
48 Correct 12 ms 24084 KB Output is correct
49 Correct 12 ms 24016 KB Output is correct
50 Correct 14 ms 24024 KB Output is correct
51 Correct 11 ms 23892 KB Output is correct
52 Correct 11 ms 23892 KB Output is correct
53 Correct 11 ms 23892 KB Output is correct
54 Correct 11 ms 23892 KB Output is correct
55 Correct 10 ms 23764 KB Output is correct
56 Correct 42 ms 27648 KB Output is correct
57 Correct 66 ms 27724 KB Output is correct
58 Correct 11 ms 23892 KB Output is correct
59 Correct 10 ms 23764 KB Output is correct
60 Correct 9 ms 23764 KB Output is correct
61 Correct 71 ms 27848 KB Output is correct
62 Correct 11 ms 23892 KB Output is correct
63 Correct 51 ms 36232 KB Output is correct
64 Correct 70 ms 27732 KB Output is correct
65 Correct 12 ms 23872 KB Output is correct
66 Correct 64 ms 28624 KB Output is correct
67 Correct 12 ms 23892 KB Output is correct
68 Correct 12 ms 23908 KB Output is correct
69 Correct 39 ms 27596 KB Output is correct
70 Correct 11 ms 24220 KB Output is correct
71 Correct 68 ms 27668 KB Output is correct
72 Correct 58 ms 30412 KB Output is correct
73 Correct 10 ms 23828 KB Output is correct
74 Correct 59 ms 36500 KB Output is correct
75 Correct 51 ms 32476 KB Output is correct
76 Correct 11 ms 23892 KB Output is correct
77 Correct 11 ms 23968 KB Output is correct
78 Correct 40 ms 27676 KB Output is correct
79 Correct 45 ms 30580 KB Output is correct
80 Correct 11 ms 23892 KB Output is correct
81 Correct 11 ms 23892 KB Output is correct
82 Correct 9 ms 23764 KB Output is correct
83 Correct 10 ms 23828 KB Output is correct
84 Correct 10 ms 23884 KB Output is correct
85 Correct 85 ms 28584 KB Output is correct
86 Correct 12 ms 23884 KB Output is correct
87 Correct 68 ms 27896 KB Output is correct
88 Correct 10 ms 23764 KB Output is correct
89 Correct 69 ms 27740 KB Output is correct
90 Correct 84 ms 28628 KB Output is correct
91 Correct 92 ms 29676 KB Output is correct
92 Correct 39 ms 27596 KB Output is correct
93 Correct 11 ms 23940 KB Output is correct
94 Correct 10 ms 23740 KB Output is correct
95 Correct 46 ms 30412 KB Output is correct
96 Correct 72 ms 33804 KB Output is correct
97 Correct 12 ms 23892 KB Output is correct
98 Correct 10 ms 23820 KB Output is correct
99 Correct 44 ms 28700 KB Output is correct
100 Correct 12 ms 23892 KB Output is correct
101 Correct 80 ms 27988 KB Output is correct
102 Correct 70 ms 33272 KB Output is correct
103 Correct 11 ms 23964 KB Output is correct
104 Correct 11 ms 24020 KB Output is correct
105 Correct 12 ms 23972 KB Output is correct
106 Correct 11 ms 23892 KB Output is correct
107 Correct 11 ms 23884 KB Output is correct
108 Correct 281 ms 47952 KB Output is correct
109 Correct 503 ms 65428 KB Output is correct
110 Correct 443 ms 78880 KB Output is correct
111 Correct 584 ms 79416 KB Output is correct
112 Correct 529 ms 72072 KB Output is correct
113 Correct 299 ms 56456 KB Output is correct
114 Correct 580 ms 44228 KB Output is correct
115 Correct 563 ms 44264 KB Output is correct
116 Correct 637 ms 46976 KB Output is correct
117 Correct 731 ms 53940 KB Output is correct
118 Correct 565 ms 45036 KB Output is correct
119 Correct 695 ms 53976 KB Output is correct
120 Correct 596 ms 73484 KB Output is correct
121 Correct 714 ms 54020 KB Output is correct
122 Correct 667 ms 50736 KB Output is correct
123 Correct 294 ms 57536 KB Output is correct
124 Correct 774 ms 50640 KB Output is correct