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답안 #901607

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
901607 2024-01-09T16:47:35 Z Shayan86 Mergers (JOI19_mergers) C++17
100 / 100
 831 ms 202836 KB 
#include <bits/stdc++.h>
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// Ofast, O0, O1, O2, O3, unroll-loops, fast-math, trapv

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;

#define Mp          make_pair
#define sep         ' '
#define endl        '\n'
#define F	        first
#define S	        second
#define pb          push_back
#define all(x)      (x).begin(),(x).end()
#define kill(res)	cout << res << '\n', exit(0);
#define set_dec(x)	cout << fixed << setprecision(x);
#define fast_io     ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io     freopen("input.txt", "r", stdin) ; freopen("output.txt", "w", stdout);

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const ll L = 22;
const ll N = 5e5 + 50;
const ll Mod = 1e9 + 7;

ll n, k, d[N], h[N], par[N][L], st[N], val[N], timer, sum[N], cnt, col[N], deg[N];

bool mark[N];
vector<int> adj[N], ost[N];

void dfs(int v, int p = 0){
    par[v][0] = p;
    for(int i = 1; i < L; i++){
        if(!par[v][i-1]) continue;
        par[v][i] = par[par[v][i-1]][i-1];
    }
    st[v] = ++timer;
    val[timer] = v;
    for(int u: adj[v]){
        if(u != p){
            h[u] = h[v] + 1;
            dfs(u, v);
        }
    }
}

int getPar(int v, int k){
    for(int i = 0; i < L; i++){
        if(k & (1 << i)) v = par[v][i];
    }
    return v;
}

int lca(int v, int u){
    if(h[v] < h[u]) swap(u, v);
    v = getPar(v, h[v] - h[u]);
    if(v == u) return v;

    for(int i = L-1; i >= 0; i--){
        if(par[v][i] != par[u][i]){
            v = par[v][i]; u = par[u][i];
        }
    }
    return par[v][0];
}

void pre(int v, int p = 0){
    for(int u: adj[v]){
        if(u == p) continue;
        pre(u, v); sum[v] += sum[u];
    }
}

void ff(int v){
    col[v] = cnt;
    mark[v] = true;
    for(int u: adj[v]){
        if(h[u] > h[v] && sum[u] == 0) continue;
        if(h[u] < h[v] && sum[v] == 0) continue;
        if(mark[u]) continue;
        ff(u);
    }
}

int main(){
    fast_io;

    cin >> n >> k;

    int u, v;
    for(int i = 1; i < n; i++){
        cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
    }

    for(int i = 1; i <= n; i++) cin >> d[i];

    dfs(1);

    for(int i = 1; i <= n; i++) ost[d[i]].pb(i);

    for(int i = 1; i <= k; i++){
        if(ost[i].size() <= 1) continue;
        ll mn = n+1, mx = 0;
        for(int j: ost[i]){
            mn = min(mn, st[j]); mx = max(mx, st[j]);
        }
        int top = lca(val[mn], val[mx]);

        for(int j: ost[i]){
            sum[j]++; sum[top]--;
        }
    }
    pre(1);

    for(int i = 1; i <= n; i++){
        if(!mark[i]){
            cnt++; ff(i);
        }
    }

    for(int i = 1; i <= n; i++){
        for(int j: adj[i]){
            if(h[i] < h[j] && sum[j]) continue;
            if(h[i] > h[j] && sum[i]) continue;
            deg[col[i]]++; deg[col[j]]++;
        }
    }

    ll leaf = 0;
    for(int i = 1; i <= cnt; i++) if(deg[i] == 2) leaf++;

    cout << (leaf+1)/2;

}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 35416 KB Output is correct
2 Correct 7 ms 35420 KB Output is correct
3 Correct 7 ms 35420 KB Output is correct
4 Correct 7 ms 35420 KB Output is correct
5 Correct 7 ms 35508 KB Output is correct
6 Correct 7 ms 35420 KB Output is correct
7 Correct 7 ms 33476 KB Output is correct
8 Correct 7 ms 35420 KB Output is correct
9 Correct 8 ms 35416 KB Output is correct
10 Correct 7 ms 35420 KB Output is correct
11 Correct 8 ms 35420 KB Output is correct
12 Correct 7 ms 35420 KB Output is correct
13 Correct 8 ms 35464 KB Output is correct
14 Correct 7 ms 35420 KB Output is correct
15 Correct 8 ms 35420 KB Output is correct
16 Correct 7 ms 33372 KB Output is correct
17 Correct 7 ms 35416 KB Output is correct
18 Correct 8 ms 35420 KB Output is correct
19 Correct 6 ms 33488 KB Output is correct
20 Correct 7 ms 33372 KB Output is correct
21 Correct 7 ms 35420 KB Output is correct
22 Correct 7 ms 35420 KB Output is correct
23 Correct 7 ms 35536 KB Output is correct
24 Correct 7 ms 35420 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 35416 KB Output is correct
2 Correct 7 ms 35420 KB Output is correct
3 Correct 7 ms 35420 KB Output is correct
4 Correct 7 ms 35420 KB Output is correct
5 Correct 7 ms 35508 KB Output is correct
6 Correct 7 ms 35420 KB Output is correct
7 Correct 7 ms 33476 KB Output is correct
8 Correct 7 ms 35420 KB Output is correct
9 Correct 8 ms 35416 KB Output is correct
10 Correct 7 ms 35420 KB Output is correct
11 Correct 8 ms 35420 KB Output is correct
12 Correct 7 ms 35420 KB Output is correct
13 Correct 8 ms 35464 KB Output is correct
14 Correct 7 ms 35420 KB Output is correct
15 Correct 8 ms 35420 KB Output is correct
16 Correct 7 ms 33372 KB Output is correct
17 Correct 7 ms 35416 KB Output is correct
18 Correct 8 ms 35420 KB Output is correct
19 Correct 6 ms 33488 KB Output is correct
20 Correct 7 ms 33372 KB Output is correct
21 Correct 7 ms 35420 KB Output is correct
22 Correct 7 ms 35420 KB Output is correct
23 Correct 7 ms 35536 KB Output is correct
24 Correct 7 ms 35420 KB Output is correct
25 Correct 7 ms 35416 KB Output is correct
26 Correct 8 ms 35676 KB Output is correct
27 Correct 8 ms 35536 KB Output is correct
28 Correct 8 ms 35676 KB Output is correct
29 Correct 8 ms 35672 KB Output is correct
30 Correct 8 ms 35676 KB Output is correct
31 Correct 7 ms 35420 KB Output is correct
32 Correct 8 ms 35932 KB Output is correct
33 Correct 7 ms 35540 KB Output is correct
34 Correct 8 ms 35676 KB Output is correct
35 Correct 9 ms 33880 KB Output is correct
36 Correct 8 ms 35676 KB Output is correct
37 Correct 8 ms 35772 KB Output is correct
38 Correct 7 ms 35420 KB Output is correct
39 Correct 8 ms 35668 KB Output is correct
40 Correct 8 ms 35676 KB Output is correct
41 Correct 9 ms 35524 KB Output is correct
42 Correct 8 ms 35672 KB Output is correct
43 Correct 8 ms 35932 KB Output is correct
44 Correct 7 ms 35472 KB Output is correct
45 Correct 9 ms 35776 KB Output is correct
46 Correct 9 ms 35676 KB Output is correct
47 Correct 7 ms 35416 KB Output is correct
48 Correct 9 ms 35676 KB Output is correct
49 Correct 8 ms 33628 KB Output is correct
50 Correct 8 ms 33628 KB Output is correct
51 Correct 8 ms 35616 KB Output is correct
52 Correct 8 ms 35676 KB Output is correct
53 Correct 8 ms 35776 KB Output is correct
54 Correct 8 ms 35676 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 35416 KB Output is correct
2 Correct 7 ms 35420 KB Output is correct
3 Correct 7 ms 35420 KB Output is correct
4 Correct 7 ms 35420 KB Output is correct
5 Correct 7 ms 35508 KB Output is correct
6 Correct 7 ms 35420 KB Output is correct
7 Correct 7 ms 33476 KB Output is correct
8 Correct 7 ms 35420 KB Output is correct
9 Correct 8 ms 35416 KB Output is correct
10 Correct 7 ms 35420 KB Output is correct
11 Correct 8 ms 35420 KB Output is correct
12 Correct 7 ms 35420 KB Output is correct
13 Correct 8 ms 35464 KB Output is correct
14 Correct 7 ms 35420 KB Output is correct
15 Correct 8 ms 35420 KB Output is correct
16 Correct 7 ms 33372 KB Output is correct
17 Correct 7 ms 35416 KB Output is correct
18 Correct 8 ms 35420 KB Output is correct
19 Correct 6 ms 33488 KB Output is correct
20 Correct 7 ms 33372 KB Output is correct
21 Correct 7 ms 35420 KB Output is correct
22 Correct 7 ms 35420 KB Output is correct
23 Correct 7 ms 35536 KB Output is correct
24 Correct 7 ms 35420 KB Output is correct
25 Correct 7 ms 35672 KB Output is correct
26 Correct 49 ms 58916 KB Output is correct
27 Correct 66 ms 58576 KB Output is correct
28 Correct 9 ms 36024 KB Output is correct
29 Correct 7 ms 35416 KB Output is correct
30 Correct 7 ms 35420 KB Output is correct
31 Correct 72 ms 58548 KB Output is correct
32 Correct 8 ms 35676 KB Output is correct
33 Correct 101 ms 65724 KB Output is correct
34 Correct 68 ms 58536 KB Output is correct
35 Correct 9 ms 35932 KB Output is correct
36 Correct 87 ms 59392 KB Output is correct
37 Correct 8 ms 35928 KB Output is correct
38 Correct 8 ms 35676 KB Output is correct
39 Correct 45 ms 58780 KB Output is correct
40 Correct 8 ms 35928 KB Output is correct
41 Correct 67 ms 58384 KB Output is correct
42 Correct 95 ms 62196 KB Output is correct
43 Correct 7 ms 35416 KB Output is correct
44 Correct 90 ms 65960 KB Output is correct
45 Correct 86 ms 62288 KB Output is correct
46 Correct 8 ms 35676 KB Output is correct
47 Correct 8 ms 35676 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 48 ms 58896 KB Output is correct
2 Correct 59 ms 59664 KB Output is correct
3 Correct 8 ms 35676 KB Output is correct
4 Correct 8 ms 35676 KB Output is correct
5 Correct 8 ms 35420 KB Output is correct
6 Correct 7 ms 35420 KB Output is correct
7 Correct 8 ms 35676 KB Output is correct
8 Correct 95 ms 59908 KB Output is correct
9 Correct 8 ms 35676 KB Output is correct
10 Correct 69 ms 58792 KB Output is correct
11 Correct 7 ms 35420 KB Output is correct
12 Correct 82 ms 58708 KB Output is correct
13 Correct 107 ms 59728 KB Output is correct
14 Correct 75 ms 60296 KB Output is correct
15 Correct 49 ms 58716 KB Output is correct
16 Correct 8 ms 35676 KB Output is correct
17 Correct 7 ms 35508 KB Output is correct
18 Correct 68 ms 61496 KB Output is correct
19 Correct 91 ms 64192 KB Output is correct
20 Correct 8 ms 35676 KB Output is correct
21 Correct 7 ms 35532 KB Output is correct
22 Correct 61 ms 60104 KB Output is correct
23 Correct 8 ms 35672 KB Output is correct
24 Correct 101 ms 59192 KB Output is correct
25 Correct 86 ms 62800 KB Output is correct
26 Correct 8 ms 33628 KB Output is correct
27 Correct 8 ms 33828 KB Output is correct
28 Correct 8 ms 35600 KB Output is correct
29 Correct 8 ms 35676 KB Output is correct
30 Correct 8 ms 35784 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 35416 KB Output is correct
2 Correct 7 ms 35420 KB Output is correct
3 Correct 7 ms 35420 KB Output is correct
4 Correct 7 ms 35420 KB Output is correct
5 Correct 7 ms 35508 KB Output is correct
6 Correct 7 ms 35420 KB Output is correct
7 Correct 7 ms 33476 KB Output is correct
8 Correct 7 ms 35420 KB Output is correct
9 Correct 8 ms 35416 KB Output is correct
10 Correct 7 ms 35420 KB Output is correct
11 Correct 8 ms 35420 KB Output is correct
12 Correct 7 ms 35420 KB Output is correct
13 Correct 8 ms 35464 KB Output is correct
14 Correct 7 ms 35420 KB Output is correct
15 Correct 8 ms 35420 KB Output is correct
16 Correct 7 ms 33372 KB Output is correct
17 Correct 7 ms 35416 KB Output is correct
18 Correct 8 ms 35420 KB Output is correct
19 Correct 6 ms 33488 KB Output is correct
20 Correct 7 ms 33372 KB Output is correct
21 Correct 7 ms 35420 KB Output is correct
22 Correct 7 ms 35420 KB Output is correct
23 Correct 7 ms 35536 KB Output is correct
24 Correct 7 ms 35420 KB Output is correct
25 Correct 7 ms 35416 KB Output is correct
26 Correct 8 ms 35676 KB Output is correct
27 Correct 8 ms 35536 KB Output is correct
28 Correct 8 ms 35676 KB Output is correct
29 Correct 8 ms 35672 KB Output is correct
30 Correct 8 ms 35676 KB Output is correct
31 Correct 7 ms 35420 KB Output is correct
32 Correct 8 ms 35932 KB Output is correct
33 Correct 7 ms 35540 KB Output is correct
34 Correct 8 ms 35676 KB Output is correct
35 Correct 9 ms 33880 KB Output is correct
36 Correct 8 ms 35676 KB Output is correct
37 Correct 8 ms 35772 KB Output is correct
38 Correct 7 ms 35420 KB Output is correct
39 Correct 8 ms 35668 KB Output is correct
40 Correct 8 ms 35676 KB Output is correct
41 Correct 9 ms 35524 KB Output is correct
42 Correct 8 ms 35672 KB Output is correct
43 Correct 8 ms 35932 KB Output is correct
44 Correct 7 ms 35472 KB Output is correct
45 Correct 9 ms 35776 KB Output is correct
46 Correct 9 ms 35676 KB Output is correct
47 Correct 7 ms 35416 KB Output is correct
48 Correct 9 ms 35676 KB Output is correct
49 Correct 8 ms 33628 KB Output is correct
50 Correct 8 ms 33628 KB Output is correct
51 Correct 8 ms 35616 KB Output is correct
52 Correct 8 ms 35676 KB Output is correct
53 Correct 8 ms 35776 KB Output is correct
54 Correct 8 ms 35676 KB Output is correct
55 Correct 7 ms 35672 KB Output is correct
56 Correct 49 ms 58916 KB Output is correct
57 Correct 66 ms 58576 KB Output is correct
58 Correct 9 ms 36024 KB Output is correct
59 Correct 7 ms 35416 KB Output is correct
60 Correct 7 ms 35420 KB Output is correct
61 Correct 72 ms 58548 KB Output is correct
62 Correct 8 ms 35676 KB Output is correct
63 Correct 101 ms 65724 KB Output is correct
64 Correct 68 ms 58536 KB Output is correct
65 Correct 9 ms 35932 KB Output is correct
66 Correct 87 ms 59392 KB Output is correct
67 Correct 8 ms 35928 KB Output is correct
68 Correct 8 ms 35676 KB Output is correct
69 Correct 45 ms 58780 KB Output is correct
70 Correct 8 ms 35928 KB Output is correct
71 Correct 67 ms 58384 KB Output is correct
72 Correct 95 ms 62196 KB Output is correct
73 Correct 7 ms 35416 KB Output is correct
74 Correct 90 ms 65960 KB Output is correct
75 Correct 86 ms 62288 KB Output is correct
76 Correct 8 ms 35676 KB Output is correct
77 Correct 8 ms 35676 KB Output is correct
78 Correct 48 ms 58896 KB Output is correct
79 Correct 59 ms 59664 KB Output is correct
80 Correct 8 ms 35676 KB Output is correct
81 Correct 8 ms 35676 KB Output is correct
82 Correct 8 ms 35420 KB Output is correct
83 Correct 7 ms 35420 KB Output is correct
84 Correct 8 ms 35676 KB Output is correct
85 Correct 95 ms 59908 KB Output is correct
86 Correct 8 ms 35676 KB Output is correct
87 Correct 69 ms 58792 KB Output is correct
88 Correct 7 ms 35420 KB Output is correct
89 Correct 82 ms 58708 KB Output is correct
90 Correct 107 ms 59728 KB Output is correct
91 Correct 75 ms 60296 KB Output is correct
92 Correct 49 ms 58716 KB Output is correct
93 Correct 8 ms 35676 KB Output is correct
94 Correct 7 ms 35508 KB Output is correct
95 Correct 68 ms 61496 KB Output is correct
96 Correct 91 ms 64192 KB Output is correct
97 Correct 8 ms 35676 KB Output is correct
98 Correct 7 ms 35532 KB Output is correct
99 Correct 61 ms 60104 KB Output is correct
100 Correct 8 ms 35672 KB Output is correct
101 Correct 101 ms 59192 KB Output is correct
102 Correct 86 ms 62800 KB Output is correct
103 Correct 8 ms 33628 KB Output is correct
104 Correct 8 ms 33828 KB Output is correct
105 Correct 8 ms 35600 KB Output is correct
106 Correct 8 ms 35676 KB Output is correct
107 Correct 8 ms 35784 KB Output is correct
108 Correct 440 ms 170088 KB Output is correct
109 Correct 831 ms 179788 KB Output is correct
110 Correct 823 ms 190904 KB Output is correct
111 Correct 822 ms 202836 KB Output is correct
112 Correct 805 ms 192992 KB Output is correct
113 Correct 384 ms 179504 KB Output is correct
114 Correct 551 ms 161792 KB Output is correct
115 Correct 514 ms 161792 KB Output is correct
116 Correct 650 ms 166376 KB Output is correct
117 Correct 589 ms 179608 KB Output is correct
118 Correct 524 ms 162724 KB Output is correct
119 Correct 575 ms 179740 KB Output is correct
120 Correct 764 ms 193604 KB Output is correct
121 Correct 565 ms 179740 KB Output is correct
122 Correct 672 ms 171604 KB Output is correct
123 Correct 367 ms 177360 KB Output is correct
124 Correct 702 ms 178256 KB Output is correct