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답안 #470679

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
470679 2021-09-05T00:40:58 Z aZvezda Mergers (JOI19_mergers) C++14
100 / 100
 1178 ms 101836 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;
vector<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> 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() {
    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;
    }
    return 0;
}

Compilation message

mergers.cpp: In function 'void dfs(int, int, bool)':
mergers.cpp:71:27: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   71 |         while(stck.size() > topRet) {
      |               ~~~~~~~~~~~~^~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23736 KB Output is correct
2 Correct 13 ms 23796 KB Output is correct
3 Correct 13 ms 23760 KB Output is correct
4 Correct 13 ms 23744 KB Output is correct
5 Correct 13 ms 23756 KB Output is correct
6 Correct 13 ms 23816 KB Output is correct
7 Correct 13 ms 23796 KB Output is correct
8 Correct 14 ms 23756 KB Output is correct
9 Correct 13 ms 23756 KB Output is correct
10 Correct 13 ms 23832 KB Output is correct
11 Correct 13 ms 23756 KB Output is correct
12 Correct 15 ms 23844 KB Output is correct
13 Correct 14 ms 23808 KB Output is correct
14 Correct 13 ms 23836 KB Output is correct
15 Correct 13 ms 23824 KB Output is correct
16 Correct 14 ms 23756 KB Output is correct
17 Correct 13 ms 23816 KB Output is correct
18 Correct 14 ms 23836 KB Output is correct
19 Correct 15 ms 23756 KB Output is correct
20 Correct 13 ms 23756 KB Output is correct
21 Correct 13 ms 23804 KB Output is correct
22 Correct 13 ms 23848 KB Output is correct
23 Correct 13 ms 23836 KB Output is correct
24 Correct 13 ms 23800 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23736 KB Output is correct
2 Correct 13 ms 23796 KB Output is correct
3 Correct 13 ms 23760 KB Output is correct
4 Correct 13 ms 23744 KB Output is correct
5 Correct 13 ms 23756 KB Output is correct
6 Correct 13 ms 23816 KB Output is correct
7 Correct 13 ms 23796 KB Output is correct
8 Correct 14 ms 23756 KB Output is correct
9 Correct 13 ms 23756 KB Output is correct
10 Correct 13 ms 23832 KB Output is correct
11 Correct 13 ms 23756 KB Output is correct
12 Correct 15 ms 23844 KB Output is correct
13 Correct 14 ms 23808 KB Output is correct
14 Correct 13 ms 23836 KB Output is correct
15 Correct 13 ms 23824 KB Output is correct
16 Correct 14 ms 23756 KB Output is correct
17 Correct 13 ms 23816 KB Output is correct
18 Correct 14 ms 23836 KB Output is correct
19 Correct 15 ms 23756 KB Output is correct
20 Correct 13 ms 23756 KB Output is correct
21 Correct 13 ms 23804 KB Output is correct
22 Correct 13 ms 23848 KB Output is correct
23 Correct 13 ms 23836 KB Output is correct
24 Correct 13 ms 23800 KB Output is correct
25 Correct 14 ms 23728 KB Output is correct
26 Correct 17 ms 23976 KB Output is correct
27 Correct 17 ms 23884 KB Output is correct
28 Correct 15 ms 24116 KB Output is correct
29 Correct 16 ms 23976 KB Output is correct
30 Correct 15 ms 23884 KB Output is correct
31 Correct 13 ms 23756 KB Output is correct
32 Correct 16 ms 24216 KB Output is correct
33 Correct 14 ms 23756 KB Output is correct
34 Correct 15 ms 23960 KB Output is correct
35 Correct 15 ms 24036 KB Output is correct
36 Correct 15 ms 23884 KB Output is correct
37 Correct 15 ms 23884 KB Output is correct
38 Correct 14 ms 23844 KB Output is correct
39 Correct 15 ms 23988 KB Output is correct
40 Correct 15 ms 23908 KB Output is correct
41 Correct 15 ms 23892 KB Output is correct
42 Correct 16 ms 24016 KB Output is correct
43 Correct 15 ms 24140 KB Output is correct
44 Correct 13 ms 23756 KB Output is correct
45 Correct 15 ms 24008 KB Output is correct
46 Correct 15 ms 23884 KB Output is correct
47 Correct 13 ms 23760 KB Output is correct
48 Correct 15 ms 23980 KB Output is correct
49 Correct 15 ms 24012 KB Output is correct
50 Correct 15 ms 24012 KB Output is correct
51 Correct 15 ms 23884 KB Output is correct
52 Correct 15 ms 23912 KB Output is correct
53 Correct 14 ms 23996 KB Output is correct
54 Correct 15 ms 23884 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23736 KB Output is correct
2 Correct 13 ms 23796 KB Output is correct
3 Correct 13 ms 23760 KB Output is correct
4 Correct 13 ms 23744 KB Output is correct
5 Correct 13 ms 23756 KB Output is correct
6 Correct 13 ms 23816 KB Output is correct
7 Correct 13 ms 23796 KB Output is correct
8 Correct 14 ms 23756 KB Output is correct
9 Correct 13 ms 23756 KB Output is correct
10 Correct 13 ms 23832 KB Output is correct
11 Correct 13 ms 23756 KB Output is correct
12 Correct 15 ms 23844 KB Output is correct
13 Correct 14 ms 23808 KB Output is correct
14 Correct 13 ms 23836 KB Output is correct
15 Correct 13 ms 23824 KB Output is correct
16 Correct 14 ms 23756 KB Output is correct
17 Correct 13 ms 23816 KB Output is correct
18 Correct 14 ms 23836 KB Output is correct
19 Correct 15 ms 23756 KB Output is correct
20 Correct 13 ms 23756 KB Output is correct
21 Correct 13 ms 23804 KB Output is correct
22 Correct 13 ms 23848 KB Output is correct
23 Correct 13 ms 23836 KB Output is correct
24 Correct 13 ms 23800 KB Output is correct
25 Correct 14 ms 23812 KB Output is correct
26 Correct 63 ms 28472 KB Output is correct
27 Correct 110 ms 28336 KB Output is correct
28 Correct 15 ms 23884 KB Output is correct
29 Correct 15 ms 23756 KB Output is correct
30 Correct 13 ms 23740 KB Output is correct
31 Correct 100 ms 28252 KB Output is correct
32 Correct 16 ms 23932 KB Output is correct
33 Correct 87 ms 36732 KB Output is correct
34 Correct 109 ms 29636 KB Output is correct
35 Correct 16 ms 24012 KB Output is correct
36 Correct 102 ms 30528 KB Output is correct
37 Correct 15 ms 24012 KB Output is correct
38 Correct 16 ms 23884 KB Output is correct
39 Correct 61 ms 29884 KB Output is correct
40 Correct 15 ms 24188 KB Output is correct
41 Correct 106 ms 29592 KB Output is correct
42 Correct 96 ms 32356 KB Output is correct
43 Correct 14 ms 23776 KB Output is correct
44 Correct 85 ms 38464 KB Output is correct
45 Correct 94 ms 34080 KB Output is correct
46 Correct 15 ms 23944 KB Output is correct
47 Correct 15 ms 23884 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 60 ms 28484 KB Output is correct
2 Correct 68 ms 30364 KB Output is correct
3 Correct 16 ms 24016 KB Output is correct
4 Correct 15 ms 23992 KB Output is correct
5 Correct 13 ms 23756 KB Output is correct
6 Correct 13 ms 23744 KB Output is correct
7 Correct 15 ms 23944 KB Output is correct
8 Correct 119 ms 28636 KB Output is correct
9 Correct 15 ms 23936 KB Output is correct
10 Correct 120 ms 28304 KB Output is correct
11 Correct 13 ms 23756 KB Output is correct
12 Correct 121 ms 28216 KB Output is correct
13 Correct 135 ms 30532 KB Output is correct
14 Correct 144 ms 32368 KB Output is correct
15 Correct 63 ms 29828 KB Output is correct
16 Correct 15 ms 24012 KB Output is correct
17 Correct 13 ms 23812 KB Output is correct
18 Correct 74 ms 32004 KB Output is correct
19 Correct 152 ms 38596 KB Output is correct
20 Correct 16 ms 24012 KB Output is correct
21 Correct 14 ms 23792 KB Output is correct
22 Correct 67 ms 30724 KB Output is correct
23 Correct 16 ms 23924 KB Output is correct
24 Correct 120 ms 29896 KB Output is correct
25 Correct 142 ms 35516 KB Output is correct
26 Correct 14 ms 24012 KB Output is correct
27 Correct 15 ms 24140 KB Output is correct
28 Correct 16 ms 23900 KB Output is correct
29 Correct 15 ms 23956 KB Output is correct
30 Correct 15 ms 23948 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23736 KB Output is correct
2 Correct 13 ms 23796 KB Output is correct
3 Correct 13 ms 23760 KB Output is correct
4 Correct 13 ms 23744 KB Output is correct
5 Correct 13 ms 23756 KB Output is correct
6 Correct 13 ms 23816 KB Output is correct
7 Correct 13 ms 23796 KB Output is correct
8 Correct 14 ms 23756 KB Output is correct
9 Correct 13 ms 23756 KB Output is correct
10 Correct 13 ms 23832 KB Output is correct
11 Correct 13 ms 23756 KB Output is correct
12 Correct 15 ms 23844 KB Output is correct
13 Correct 14 ms 23808 KB Output is correct
14 Correct 13 ms 23836 KB Output is correct
15 Correct 13 ms 23824 KB Output is correct
16 Correct 14 ms 23756 KB Output is correct
17 Correct 13 ms 23816 KB Output is correct
18 Correct 14 ms 23836 KB Output is correct
19 Correct 15 ms 23756 KB Output is correct
20 Correct 13 ms 23756 KB Output is correct
21 Correct 13 ms 23804 KB Output is correct
22 Correct 13 ms 23848 KB Output is correct
23 Correct 13 ms 23836 KB Output is correct
24 Correct 13 ms 23800 KB Output is correct
25 Correct 14 ms 23728 KB Output is correct
26 Correct 17 ms 23976 KB Output is correct
27 Correct 17 ms 23884 KB Output is correct
28 Correct 15 ms 24116 KB Output is correct
29 Correct 16 ms 23976 KB Output is correct
30 Correct 15 ms 23884 KB Output is correct
31 Correct 13 ms 23756 KB Output is correct
32 Correct 16 ms 24216 KB Output is correct
33 Correct 14 ms 23756 KB Output is correct
34 Correct 15 ms 23960 KB Output is correct
35 Correct 15 ms 24036 KB Output is correct
36 Correct 15 ms 23884 KB Output is correct
37 Correct 15 ms 23884 KB Output is correct
38 Correct 14 ms 23844 KB Output is correct
39 Correct 15 ms 23988 KB Output is correct
40 Correct 15 ms 23908 KB Output is correct
41 Correct 15 ms 23892 KB Output is correct
42 Correct 16 ms 24016 KB Output is correct
43 Correct 15 ms 24140 KB Output is correct
44 Correct 13 ms 23756 KB Output is correct
45 Correct 15 ms 24008 KB Output is correct
46 Correct 15 ms 23884 KB Output is correct
47 Correct 13 ms 23760 KB Output is correct
48 Correct 15 ms 23980 KB Output is correct
49 Correct 15 ms 24012 KB Output is correct
50 Correct 15 ms 24012 KB Output is correct
51 Correct 15 ms 23884 KB Output is correct
52 Correct 15 ms 23912 KB Output is correct
53 Correct 14 ms 23996 KB Output is correct
54 Correct 15 ms 23884 KB Output is correct
55 Correct 14 ms 23812 KB Output is correct
56 Correct 63 ms 28472 KB Output is correct
57 Correct 110 ms 28336 KB Output is correct
58 Correct 15 ms 23884 KB Output is correct
59 Correct 15 ms 23756 KB Output is correct
60 Correct 13 ms 23740 KB Output is correct
61 Correct 100 ms 28252 KB Output is correct
62 Correct 16 ms 23932 KB Output is correct
63 Correct 87 ms 36732 KB Output is correct
64 Correct 109 ms 29636 KB Output is correct
65 Correct 16 ms 24012 KB Output is correct
66 Correct 102 ms 30528 KB Output is correct
67 Correct 15 ms 24012 KB Output is correct
68 Correct 16 ms 23884 KB Output is correct
69 Correct 61 ms 29884 KB Output is correct
70 Correct 15 ms 24188 KB Output is correct
71 Correct 106 ms 29592 KB Output is correct
72 Correct 96 ms 32356 KB Output is correct
73 Correct 14 ms 23776 KB Output is correct
74 Correct 85 ms 38464 KB Output is correct
75 Correct 94 ms 34080 KB Output is correct
76 Correct 15 ms 23944 KB Output is correct
77 Correct 15 ms 23884 KB Output is correct
78 Correct 60 ms 28484 KB Output is correct
79 Correct 68 ms 30364 KB Output is correct
80 Correct 16 ms 24016 KB Output is correct
81 Correct 15 ms 23992 KB Output is correct
82 Correct 13 ms 23756 KB Output is correct
83 Correct 13 ms 23744 KB Output is correct
84 Correct 15 ms 23944 KB Output is correct
85 Correct 119 ms 28636 KB Output is correct
86 Correct 15 ms 23936 KB Output is correct
87 Correct 120 ms 28304 KB Output is correct
88 Correct 13 ms 23756 KB Output is correct
89 Correct 121 ms 28216 KB Output is correct
90 Correct 135 ms 30532 KB Output is correct
91 Correct 144 ms 32368 KB Output is correct
92 Correct 63 ms 29828 KB Output is correct
93 Correct 15 ms 24012 KB Output is correct
94 Correct 13 ms 23812 KB Output is correct
95 Correct 74 ms 32004 KB Output is correct
96 Correct 152 ms 38596 KB Output is correct
97 Correct 16 ms 24012 KB Output is correct
98 Correct 14 ms 23792 KB Output is correct
99 Correct 67 ms 30724 KB Output is correct
100 Correct 16 ms 23924 KB Output is correct
101 Correct 120 ms 29896 KB Output is correct
102 Correct 142 ms 35516 KB Output is correct
103 Correct 14 ms 24012 KB Output is correct
104 Correct 15 ms 24140 KB Output is correct
105 Correct 16 ms 23900 KB Output is correct
106 Correct 15 ms 23956 KB Output is correct
107 Correct 15 ms 23948 KB Output is correct
108 Correct 424 ms 59312 KB Output is correct
109 Correct 760 ms 75264 KB Output is correct
110 Correct 723 ms 88648 KB Output is correct
111 Correct 949 ms 101836 KB Output is correct
112 Correct 833 ms 78780 KB Output is correct
113 Correct 486 ms 65564 KB Output is correct
114 Correct 891 ms 53568 KB Output is correct
115 Correct 930 ms 53560 KB Output is correct
116 Correct 978 ms 56260 KB Output is correct
117 Correct 1145 ms 67760 KB Output is correct
118 Correct 886 ms 53828 KB Output is correct
119 Correct 1162 ms 67796 KB Output is correct
120 Correct 908 ms 85136 KB Output is correct
121 Correct 1076 ms 67820 KB Output is correct
122 Correct 1018 ms 59580 KB Output is correct
123 Correct 471 ms 66224 KB Output is correct
124 Correct 1178 ms 69012 KB Output is correct