oj.uz

답안 #366218

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
366218 2021-02-13T14:20:44 Z vaaven Mergers (JOI19_mergers) C++14
100 / 100
 1293 ms 139756 KB 
//#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#include <iostream>
#include <vector>
#include <algorithm>
#include <math.h>
#include <set>
#include <stack>
#include <iomanip>
#include <bitset>
#include <map>
#include <cassert>
#include <array>
#include <queue>
#include <cstring>
#include <random>
#include <unordered_set>
#include <unordered_map>
#define pqueue priority_queue
#define pb(x) push_back(x)
// #define endl '\n'
#define all(x) x.begin(), x.end()
//#define int long  long
  
using namespace std;
  
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
// typedef tuple<ll, ll, ll> tiii;
typedef pair<int, int> pii;
typedef vector<pair<int, int> > vpii;
typedef vector<bool> vb;
typedef vector<string> vs;
typedef vector<char> vc;
  
const int inf = 1e9;
const ll mod = 1e9 + 7;
const ll mod2 = 998244353;
const ld eps = 1e-14;
  
  
void fast_io(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
//    freopen("inputik.txt", "r", stdin);
//    freopen("outputik.txt", "w", stdout);
}
  
const int maxn = 5e5 + 228;
vi g[maxn];
int up[maxn][20], a[maxn], tin[maxn], tout[maxn], link[maxn], sizex[maxn];
int timer = 0;
  
void unite(int a, int b);
  
void dfs(int v, int p = 0){
    up[v][0] = p;
    tin[v] = timer++;
    for(int i=1; i<20; i++){
        up[v][i] = up[up[v][i-1]][i-1];
    }
    for(int i:g[v]){
        if(i != p){
            dfs(i, v);
        }
    }
    tout[v] = ++timer;
}
  
void dfs2(int v, int p = -1){
    for(int i:g[v]){
        if(i != p){
            dfs2(i, v);
            a[v] += a[i];
        }
    }
    if(a[v])
        unite(v, p);
}
  
bool upper(int a, int b){
    return tin[a] <= tin[b] && tout[b] <= tout[a];
}
  
int lca(int a, int b){
    if(upper(a, b))
        return a;
    if(upper(b, a))
        return b;
    int cur = a;
    for(int i=19; i>=0; i--){
        if(!upper(up[cur][i], b)){
            cur = up[cur][i];
        }
    }
    cur = up[cur][0];
    return cur;
}
  
int find(int a){
    return (link[a] == a ? a : link[a] = find(link[a]));
}
  
void unite(int a, int b){
//    cout << 1 << endl;
    a = find(a);
    b = find(b);
    if(a == b)
        return;
    if(sizex[a] > sizex[b])
        swap(a, b);
    link[a] = b;
    sizex[b] += sizex[a];
}
  
void solve(){
    int n, k;
    cin >> n >> k;
    vvi col(k);
    for(int i=0; i+1<n; i++){
        int a, b;
        cin >> a >> b;
        a--, b--;
        g[a].pb(b);
        g[b].pb(a);
    }
    for(int i=0; i<n; i++){
        int a;
        cin >> a;
        col[a-1].pb(i);
    }
    dfs(0);
    for(int i=0; i<k; i++){
        int cur = col[i][0];
        for(int j=1; j<col[i].size(); j++){
            cur = lca(cur, col[i][j]);
        }
//        cout << i << " " << cur << endl;
        for(int j:col[i]){
            a[j]++;
            a[cur]--;
        }
    }
    for(int i=0; i<maxn; i++){
        link[i] = i;
        sizex[i] = 1;
    }
    dfs2(0);
    int ans = 0;
    vi cnt(n, 0);
    for(int i=0; i<n; i++){
        for(int j:g[i]){
            if(find(i) != find(j)){
                cnt[find(i)]++;
                cnt[find(j)]++;
            }
        }
    }
    for(int i=0; i<n; i++){
        if(cnt[i] == 2 && find(i) == i){
//            cout << 1 << endl;
            ans++;
        }
    }
//    cout << endl;
//    cout << ans << endl;
    cout << max((ans+1)/2, 0) << endl;
}
/*
5 4
1 2
2 3
3 4
3 5
1
2
1
3
4
=======
5 4
1 2
2 3
3 4
4 5
1
2
3
4
1
=======
2 2
1 2
1
2
 */
  
  
signed main(){
     fast_io();
//  srand(time(NULL));
    cout << fixed << setprecision(10);
    int q = 1;
//    cin >> q;
    while(q--)
        solve();
}

Compilation message

mergers.cpp: In function 'void solve()':
mergers.cpp:138:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  138 |         for(int j=1; j<col[i].size(); j++){
      |                      ~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 15980 KB Output is correct
2 Correct 11 ms 15980 KB Output is correct
3 Correct 11 ms 15980 KB Output is correct
4 Correct 11 ms 15980 KB Output is correct
5 Correct 11 ms 15980 KB Output is correct
6 Correct 11 ms 15980 KB Output is correct
7 Correct 12 ms 15980 KB Output is correct
8 Correct 11 ms 15980 KB Output is correct
9 Correct 11 ms 15980 KB Output is correct
10 Correct 13 ms 15980 KB Output is correct
11 Correct 11 ms 15980 KB Output is correct
12 Correct 11 ms 15980 KB Output is correct
13 Correct 11 ms 15980 KB Output is correct
14 Correct 12 ms 15980 KB Output is correct
15 Correct 12 ms 15980 KB Output is correct
16 Correct 11 ms 15980 KB Output is correct
17 Correct 11 ms 15980 KB Output is correct
18 Correct 11 ms 15980 KB Output is correct
19 Correct 11 ms 15980 KB Output is correct
20 Correct 11 ms 16128 KB Output is correct
21 Correct 11 ms 15980 KB Output is correct
22 Correct 11 ms 15980 KB Output is correct
23 Correct 11 ms 15980 KB Output is correct
24 Correct 11 ms 15980 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 15980 KB Output is correct
2 Correct 11 ms 15980 KB Output is correct
3 Correct 11 ms 15980 KB Output is correct
4 Correct 11 ms 15980 KB Output is correct
5 Correct 11 ms 15980 KB Output is correct
6 Correct 11 ms 15980 KB Output is correct
7 Correct 12 ms 15980 KB Output is correct
8 Correct 11 ms 15980 KB Output is correct
9 Correct 11 ms 15980 KB Output is correct
10 Correct 13 ms 15980 KB Output is correct
11 Correct 11 ms 15980 KB Output is correct
12 Correct 11 ms 15980 KB Output is correct
13 Correct 11 ms 15980 KB Output is correct
14 Correct 12 ms 15980 KB Output is correct
15 Correct 12 ms 15980 KB Output is correct
16 Correct 11 ms 15980 KB Output is correct
17 Correct 11 ms 15980 KB Output is correct
18 Correct 11 ms 15980 KB Output is correct
19 Correct 11 ms 15980 KB Output is correct
20 Correct 11 ms 16128 KB Output is correct
21 Correct 11 ms 15980 KB Output is correct
22 Correct 11 ms 15980 KB Output is correct
23 Correct 11 ms 15980 KB Output is correct
24 Correct 11 ms 15980 KB Output is correct
25 Correct 11 ms 15980 KB Output is correct
26 Correct 13 ms 16620 KB Output is correct
27 Correct 13 ms 16492 KB Output is correct
28 Correct 14 ms 16748 KB Output is correct
29 Correct 14 ms 16620 KB Output is correct
30 Correct 13 ms 16512 KB Output is correct
31 Correct 11 ms 15980 KB Output is correct
32 Correct 14 ms 16748 KB Output is correct
33 Correct 11 ms 15980 KB Output is correct
34 Correct 13 ms 16512 KB Output is correct
35 Correct 14 ms 16620 KB Output is correct
36 Correct 14 ms 16620 KB Output is correct
37 Correct 14 ms 16492 KB Output is correct
38 Correct 12 ms 16108 KB Output is correct
39 Correct 14 ms 16492 KB Output is correct
40 Correct 13 ms 16492 KB Output is correct
41 Correct 13 ms 16492 KB Output is correct
42 Correct 13 ms 16492 KB Output is correct
43 Correct 13 ms 16748 KB Output is correct
44 Correct 11 ms 16108 KB Output is correct
45 Correct 13 ms 16620 KB Output is correct
46 Correct 13 ms 16492 KB Output is correct
47 Correct 11 ms 16108 KB Output is correct
48 Correct 14 ms 16492 KB Output is correct
49 Correct 13 ms 16620 KB Output is correct
50 Correct 13 ms 16620 KB Output is correct
51 Correct 13 ms 16492 KB Output is correct
52 Correct 13 ms 16492 KB Output is correct
53 Correct 13 ms 16492 KB Output is correct
54 Correct 13 ms 16492 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 15980 KB Output is correct
2 Correct 11 ms 15980 KB Output is correct
3 Correct 11 ms 15980 KB Output is correct
4 Correct 11 ms 15980 KB Output is correct
5 Correct 11 ms 15980 KB Output is correct
6 Correct 11 ms 15980 KB Output is correct
7 Correct 12 ms 15980 KB Output is correct
8 Correct 11 ms 15980 KB Output is correct
9 Correct 11 ms 15980 KB Output is correct
10 Correct 13 ms 15980 KB Output is correct
11 Correct 11 ms 15980 KB Output is correct
12 Correct 11 ms 15980 KB Output is correct
13 Correct 11 ms 15980 KB Output is correct
14 Correct 12 ms 15980 KB Output is correct
15 Correct 12 ms 15980 KB Output is correct
16 Correct 11 ms 15980 KB Output is correct
17 Correct 11 ms 15980 KB Output is correct
18 Correct 11 ms 15980 KB Output is correct
19 Correct 11 ms 15980 KB Output is correct
20 Correct 11 ms 16128 KB Output is correct
21 Correct 11 ms 15980 KB Output is correct
22 Correct 11 ms 15980 KB Output is correct
23 Correct 11 ms 15980 KB Output is correct
24 Correct 11 ms 15980 KB Output is correct
25 Correct 13 ms 15980 KB Output is correct
26 Correct 75 ms 30948 KB Output is correct
27 Correct 113 ms 30700 KB Output is correct
28 Correct 15 ms 16492 KB Output is correct
29 Correct 13 ms 15980 KB Output is correct
30 Correct 13 ms 15980 KB Output is correct
31 Correct 120 ms 30660 KB Output is correct
32 Correct 13 ms 16492 KB Output is correct
33 Correct 147 ms 37740 KB Output is correct
34 Correct 130 ms 30956 KB Output is correct
35 Correct 13 ms 16492 KB Output is correct
36 Correct 126 ms 31340 KB Output is correct
37 Correct 13 ms 16512 KB Output is correct
38 Correct 15 ms 16492 KB Output is correct
39 Correct 83 ms 30948 KB Output is correct
40 Correct 15 ms 16748 KB Output is correct
41 Correct 110 ms 30748 KB Output is correct
42 Correct 136 ms 33004 KB Output is correct
43 Correct 11 ms 16108 KB Output is correct
44 Correct 163 ms 37988 KB Output is correct
45 Correct 164 ms 34412 KB Output is correct
46 Correct 13 ms 16492 KB Output is correct
47 Correct 13 ms 16492 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 76 ms 30948 KB Output is correct
2 Correct 108 ms 36196 KB Output is correct
3 Correct 14 ms 16620 KB Output is correct
4 Correct 15 ms 16492 KB Output is correct
5 Correct 11 ms 15980 KB Output is correct
6 Correct 11 ms 15980 KB Output is correct
7 Correct 13 ms 16492 KB Output is correct
8 Correct 147 ms 33288 KB Output is correct
9 Correct 13 ms 16492 KB Output is correct
10 Correct 130 ms 30828 KB Output is correct
11 Correct 11 ms 16108 KB Output is correct
12 Correct 121 ms 30828 KB Output is correct
13 Correct 155 ms 33132 KB Output is correct
14 Correct 141 ms 36076 KB Output is correct
15 Correct 77 ms 30948 KB Output is correct
16 Correct 13 ms 16492 KB Output is correct
17 Correct 12 ms 16108 KB Output is correct
18 Correct 101 ms 35684 KB Output is correct
19 Correct 181 ms 40000 KB Output is correct
20 Correct 14 ms 16492 KB Output is correct
21 Correct 11 ms 16108 KB Output is correct
22 Correct 96 ms 33380 KB Output is correct
23 Correct 13 ms 16492 KB Output is correct
24 Correct 143 ms 31340 KB Output is correct
25 Correct 165 ms 38508 KB Output is correct
26 Correct 13 ms 16620 KB Output is correct
27 Correct 14 ms 16620 KB Output is correct
28 Correct 14 ms 16492 KB Output is correct
29 Correct 13 ms 16492 KB Output is correct
30 Correct 13 ms 16512 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 15980 KB Output is correct
2 Correct 11 ms 15980 KB Output is correct
3 Correct 11 ms 15980 KB Output is correct
4 Correct 11 ms 15980 KB Output is correct
5 Correct 11 ms 15980 KB Output is correct
6 Correct 11 ms 15980 KB Output is correct
7 Correct 12 ms 15980 KB Output is correct
8 Correct 11 ms 15980 KB Output is correct
9 Correct 11 ms 15980 KB Output is correct
10 Correct 13 ms 15980 KB Output is correct
11 Correct 11 ms 15980 KB Output is correct
12 Correct 11 ms 15980 KB Output is correct
13 Correct 11 ms 15980 KB Output is correct
14 Correct 12 ms 15980 KB Output is correct
15 Correct 12 ms 15980 KB Output is correct
16 Correct 11 ms 15980 KB Output is correct
17 Correct 11 ms 15980 KB Output is correct
18 Correct 11 ms 15980 KB Output is correct
19 Correct 11 ms 15980 KB Output is correct
20 Correct 11 ms 16128 KB Output is correct
21 Correct 11 ms 15980 KB Output is correct
22 Correct 11 ms 15980 KB Output is correct
23 Correct 11 ms 15980 KB Output is correct
24 Correct 11 ms 15980 KB Output is correct
25 Correct 11 ms 15980 KB Output is correct
26 Correct 13 ms 16620 KB Output is correct
27 Correct 13 ms 16492 KB Output is correct
28 Correct 14 ms 16748 KB Output is correct
29 Correct 14 ms 16620 KB Output is correct
30 Correct 13 ms 16512 KB Output is correct
31 Correct 11 ms 15980 KB Output is correct
32 Correct 14 ms 16748 KB Output is correct
33 Correct 11 ms 15980 KB Output is correct
34 Correct 13 ms 16512 KB Output is correct
35 Correct 14 ms 16620 KB Output is correct
36 Correct 14 ms 16620 KB Output is correct
37 Correct 14 ms 16492 KB Output is correct
38 Correct 12 ms 16108 KB Output is correct
39 Correct 14 ms 16492 KB Output is correct
40 Correct 13 ms 16492 KB Output is correct
41 Correct 13 ms 16492 KB Output is correct
42 Correct 13 ms 16492 KB Output is correct
43 Correct 13 ms 16748 KB Output is correct
44 Correct 11 ms 16108 KB Output is correct
45 Correct 13 ms 16620 KB Output is correct
46 Correct 13 ms 16492 KB Output is correct
47 Correct 11 ms 16108 KB Output is correct
48 Correct 14 ms 16492 KB Output is correct
49 Correct 13 ms 16620 KB Output is correct
50 Correct 13 ms 16620 KB Output is correct
51 Correct 13 ms 16492 KB Output is correct
52 Correct 13 ms 16492 KB Output is correct
53 Correct 13 ms 16492 KB Output is correct
54 Correct 13 ms 16492 KB Output is correct
55 Correct 13 ms 15980 KB Output is correct
56 Correct 75 ms 30948 KB Output is correct
57 Correct 113 ms 30700 KB Output is correct
58 Correct 15 ms 16492 KB Output is correct
59 Correct 13 ms 15980 KB Output is correct
60 Correct 13 ms 15980 KB Output is correct
61 Correct 120 ms 30660 KB Output is correct
62 Correct 13 ms 16492 KB Output is correct
63 Correct 147 ms 37740 KB Output is correct
64 Correct 130 ms 30956 KB Output is correct
65 Correct 13 ms 16492 KB Output is correct
66 Correct 126 ms 31340 KB Output is correct
67 Correct 13 ms 16512 KB Output is correct
68 Correct 15 ms 16492 KB Output is correct
69 Correct 83 ms 30948 KB Output is correct
70 Correct 15 ms 16748 KB Output is correct
71 Correct 110 ms 30748 KB Output is correct
72 Correct 136 ms 33004 KB Output is correct
73 Correct 11 ms 16108 KB Output is correct
74 Correct 163 ms 37988 KB Output is correct
75 Correct 164 ms 34412 KB Output is correct
76 Correct 13 ms 16492 KB Output is correct
77 Correct 13 ms 16492 KB Output is correct
78 Correct 76 ms 30948 KB Output is correct
79 Correct 108 ms 36196 KB Output is correct
80 Correct 14 ms 16620 KB Output is correct
81 Correct 15 ms 16492 KB Output is correct
82 Correct 11 ms 15980 KB Output is correct
83 Correct 11 ms 15980 KB Output is correct
84 Correct 13 ms 16492 KB Output is correct
85 Correct 147 ms 33288 KB Output is correct
86 Correct 13 ms 16492 KB Output is correct
87 Correct 130 ms 30828 KB Output is correct
88 Correct 11 ms 16108 KB Output is correct
89 Correct 121 ms 30828 KB Output is correct
90 Correct 155 ms 33132 KB Output is correct
91 Correct 141 ms 36076 KB Output is correct
92 Correct 77 ms 30948 KB Output is correct
93 Correct 13 ms 16492 KB Output is correct
94 Correct 12 ms 16108 KB Output is correct
95 Correct 101 ms 35684 KB Output is correct
96 Correct 181 ms 40000 KB Output is correct
97 Correct 14 ms 16492 KB Output is correct
98 Correct 11 ms 16108 KB Output is correct
99 Correct 96 ms 33380 KB Output is correct
100 Correct 13 ms 16492 KB Output is correct
101 Correct 143 ms 31340 KB Output is correct
102 Correct 165 ms 38508 KB Output is correct
103 Correct 13 ms 16620 KB Output is correct
104 Correct 14 ms 16620 KB Output is correct
105 Correct 14 ms 16492 KB Output is correct
106 Correct 13 ms 16492 KB Output is correct
107 Correct 13 ms 16512 KB Output is correct
108 Correct 673 ms 101784 KB Output is correct
109 Correct 1066 ms 107012 KB Output is correct
110 Correct 1067 ms 118236 KB Output is correct
111 Correct 1293 ms 139756 KB Output is correct
112 Correct 1231 ms 130008 KB Output is correct
113 Correct 718 ms 115540 KB Output is correct
114 Correct 765 ms 88968 KB Output is correct
115 Correct 783 ms 88924 KB Output is correct
116 Correct 970 ms 95992 KB Output is correct
117 Correct 998 ms 116588 KB Output is correct
118 Correct 778 ms 89452 KB Output is correct
119 Correct 992 ms 116588 KB Output is correct
120 Correct 1228 ms 130796 KB Output is correct
121 Correct 989 ms 116588 KB Output is correct
122 Correct 1049 ms 105836 KB Output is correct
123 Correct 710 ms 118080 KB Output is correct
124 Correct 1084 ms 114540 KB Output is correct