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답안 #497522

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
497522 2021-12-23T08:12:20 Z ryangohca Mergers (JOI19_mergers) C++17
100 / 100
 730 ms 69160 KB 
#include <bits/stdc++.h>
#define pii pair<int, int>
#define ti3 tuple<int, int, int>
#define ti4 tuple<int, int, int, int>
#define int long long
// Honestly, I love you, to the mysterious (SinB) place   ~ SinB, Sunny Summer
using namespace std;
int p[500005];
int fs(int x){
    if (p[x] == x) return x;
    else return p[x] = fs(p[x]);
}
bool ss(int x, int y){
    return fs(x) == fs(y);
}
void ms(int x, int y){ // x <- y
    if (ss(x, y)) return;
    p[fs(y)] = fs(x);
}
vector<int> adjlist[500005];
int tpar[500005], dep[500005];
void dfs(int x, int p, int d){
    tpar[x] = p;
    dep[x] = d;
    for (auto i : adjlist[x]){
        if (i == p) continue;
        dfs(i, x, d+1);
    }
}
int prvState[500005], deg[500005];
main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n, k; cin >> n >> k;
    for (int i = 0; i < n - 1; i++){
        int a, b; cin >> a >> b;
        adjlist[a].push_back(b);
        adjlist[b].push_back(a);
    }
    dfs(1, -1, 0);
    iota(p, p+n+2, 0);
    for (int i = 1; i <= n; i++){
        int x; cin >> x;
        if (prvState[x]){
            int a = fs(i), b = fs(prvState[x]);
            while (!ss(a, b)){
                if (dep[a] > dep[b]) swap(a, b);
                ms(tpar[b], b);
                b = fs(b);
            }
        }
        prvState[x] = i;
    }
    for (int i = 1; i <= n; i++){
        for (auto j : adjlist[i]){
            if (!ss(i, j)) deg[fs(i)]++;
        }
    }
    int cnt = 0;
    for (int i = 1; i <= n; i++){
        if (deg[i] == 1) cnt++;
    }
    cout << (cnt + 1) / 2 << endl;
}

Compilation message

mergers.cpp:31:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   31 | main(){
      | ^~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 11984 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 8 ms 12024 KB Output is correct
4 Correct 7 ms 11984 KB Output is correct
5 Correct 7 ms 11984 KB Output is correct
6 Correct 7 ms 12112 KB Output is correct
7 Correct 8 ms 12112 KB Output is correct
8 Correct 8 ms 11984 KB Output is correct
9 Correct 7 ms 11984 KB Output is correct
10 Correct 7 ms 12080 KB Output is correct
11 Correct 7 ms 11984 KB Output is correct
12 Correct 7 ms 12108 KB Output is correct
13 Correct 7 ms 12088 KB Output is correct
14 Correct 6 ms 11984 KB Output is correct
15 Correct 8 ms 11984 KB Output is correct
16 Correct 7 ms 12028 KB Output is correct
17 Correct 7 ms 12048 KB Output is correct
18 Correct 7 ms 12076 KB Output is correct
19 Correct 8 ms 12024 KB Output is correct
20 Correct 7 ms 11984 KB Output is correct
21 Correct 9 ms 12068 KB Output is correct
22 Correct 7 ms 11984 KB Output is correct
23 Correct 7 ms 12048 KB Output is correct
24 Correct 7 ms 11984 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 11984 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 8 ms 12024 KB Output is correct
4 Correct 7 ms 11984 KB Output is correct
5 Correct 7 ms 11984 KB Output is correct
6 Correct 7 ms 12112 KB Output is correct
7 Correct 8 ms 12112 KB Output is correct
8 Correct 8 ms 11984 KB Output is correct
9 Correct 7 ms 11984 KB Output is correct
10 Correct 7 ms 12080 KB Output is correct
11 Correct 7 ms 11984 KB Output is correct
12 Correct 7 ms 12108 KB Output is correct
13 Correct 7 ms 12088 KB Output is correct
14 Correct 6 ms 11984 KB Output is correct
15 Correct 8 ms 11984 KB Output is correct
16 Correct 7 ms 12028 KB Output is correct
17 Correct 7 ms 12048 KB Output is correct
18 Correct 7 ms 12076 KB Output is correct
19 Correct 8 ms 12024 KB Output is correct
20 Correct 7 ms 11984 KB Output is correct
21 Correct 9 ms 12068 KB Output is correct
22 Correct 7 ms 11984 KB Output is correct
23 Correct 7 ms 12048 KB Output is correct
24 Correct 7 ms 11984 KB Output is correct
25 Correct 7 ms 12112 KB Output is correct
26 Correct 8 ms 12288 KB Output is correct
27 Correct 8 ms 12240 KB Output is correct
28 Correct 9 ms 12424 KB Output is correct
29 Correct 8 ms 12368 KB Output is correct
30 Correct 9 ms 12308 KB Output is correct
31 Correct 6 ms 11984 KB Output is correct
32 Correct 8 ms 12352 KB Output is correct
33 Correct 8 ms 12076 KB Output is correct
34 Correct 8 ms 12216 KB Output is correct
35 Correct 9 ms 12328 KB Output is correct
36 Correct 8 ms 12352 KB Output is correct
37 Correct 8 ms 12240 KB Output is correct
38 Correct 7 ms 12040 KB Output is correct
39 Correct 11 ms 12288 KB Output is correct
40 Correct 8 ms 12220 KB Output is correct
41 Correct 8 ms 12216 KB Output is correct
42 Correct 8 ms 12368 KB Output is correct
43 Correct 11 ms 12280 KB Output is correct
44 Correct 7 ms 11984 KB Output is correct
45 Correct 8 ms 12368 KB Output is correct
46 Correct 8 ms 12240 KB Output is correct
47 Correct 7 ms 11984 KB Output is correct
48 Correct 11 ms 12240 KB Output is correct
49 Correct 8 ms 12368 KB Output is correct
50 Correct 7 ms 12368 KB Output is correct
51 Correct 9 ms 12240 KB Output is correct
52 Correct 8 ms 12288 KB Output is correct
53 Correct 9 ms 12368 KB Output is correct
54 Correct 8 ms 12240 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 11984 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 8 ms 12024 KB Output is correct
4 Correct 7 ms 11984 KB Output is correct
5 Correct 7 ms 11984 KB Output is correct
6 Correct 7 ms 12112 KB Output is correct
7 Correct 8 ms 12112 KB Output is correct
8 Correct 8 ms 11984 KB Output is correct
9 Correct 7 ms 11984 KB Output is correct
10 Correct 7 ms 12080 KB Output is correct
11 Correct 7 ms 11984 KB Output is correct
12 Correct 7 ms 12108 KB Output is correct
13 Correct 7 ms 12088 KB Output is correct
14 Correct 6 ms 11984 KB Output is correct
15 Correct 8 ms 11984 KB Output is correct
16 Correct 7 ms 12028 KB Output is correct
17 Correct 7 ms 12048 KB Output is correct
18 Correct 7 ms 12076 KB Output is correct
19 Correct 8 ms 12024 KB Output is correct
20 Correct 7 ms 11984 KB Output is correct
21 Correct 9 ms 12068 KB Output is correct
22 Correct 7 ms 11984 KB Output is correct
23 Correct 7 ms 12048 KB Output is correct
24 Correct 7 ms 11984 KB Output is correct
25 Correct 6 ms 11984 KB Output is correct
26 Correct 54 ms 19720 KB Output is correct
27 Correct 70 ms 19604 KB Output is correct
28 Correct 8 ms 12240 KB Output is correct
29 Correct 7 ms 12112 KB Output is correct
30 Correct 8 ms 12084 KB Output is correct
31 Correct 67 ms 19680 KB Output is correct
32 Correct 8 ms 12220 KB Output is correct
33 Correct 70 ms 22052 KB Output is correct
34 Correct 90 ms 19568 KB Output is correct
35 Correct 8 ms 12232 KB Output is correct
36 Correct 90 ms 19508 KB Output is correct
37 Correct 10 ms 12240 KB Output is correct
38 Correct 11 ms 12216 KB Output is correct
39 Correct 52 ms 19744 KB Output is correct
40 Correct 8 ms 12368 KB Output is correct
41 Correct 69 ms 19432 KB Output is correct
42 Correct 93 ms 20064 KB Output is correct
43 Correct 7 ms 12084 KB Output is correct
44 Correct 78 ms 22012 KB Output is correct
45 Correct 79 ms 21796 KB Output is correct
46 Correct 7 ms 12240 KB Output is correct
47 Correct 9 ms 12216 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 19884 KB Output is correct
2 Correct 56 ms 21668 KB Output is correct
3 Correct 8 ms 12232 KB Output is correct
4 Correct 8 ms 12240 KB Output is correct
5 Correct 7 ms 11984 KB Output is correct
6 Correct 6 ms 12076 KB Output is correct
7 Correct 7 ms 12240 KB Output is correct
8 Correct 68 ms 20976 KB Output is correct
9 Correct 8 ms 12348 KB Output is correct
10 Correct 117 ms 20388 KB Output is correct
11 Correct 7 ms 12076 KB Output is correct
12 Correct 98 ms 19916 KB Output is correct
13 Correct 107 ms 20980 KB Output is correct
14 Correct 90 ms 21432 KB Output is correct
15 Correct 59 ms 19724 KB Output is correct
16 Correct 10 ms 12348 KB Output is correct
17 Correct 10 ms 12084 KB Output is correct
18 Correct 64 ms 21584 KB Output is correct
19 Correct 81 ms 22452 KB Output is correct
20 Correct 8 ms 12348 KB Output is correct
21 Correct 6 ms 12080 KB Output is correct
22 Correct 51 ms 21160 KB Output is correct
23 Correct 8 ms 12240 KB Output is correct
24 Correct 73 ms 20276 KB Output is correct
25 Correct 61 ms 23112 KB Output is correct
26 Correct 8 ms 12368 KB Output is correct
27 Correct 8 ms 12348 KB Output is correct
28 Correct 8 ms 12216 KB Output is correct
29 Correct 11 ms 12216 KB Output is correct
30 Correct 8 ms 12368 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 11984 KB Output is correct
2 Correct 7 ms 12032 KB Output is correct
3 Correct 8 ms 12024 KB Output is correct
4 Correct 7 ms 11984 KB Output is correct
5 Correct 7 ms 11984 KB Output is correct
6 Correct 7 ms 12112 KB Output is correct
7 Correct 8 ms 12112 KB Output is correct
8 Correct 8 ms 11984 KB Output is correct
9 Correct 7 ms 11984 KB Output is correct
10 Correct 7 ms 12080 KB Output is correct
11 Correct 7 ms 11984 KB Output is correct
12 Correct 7 ms 12108 KB Output is correct
13 Correct 7 ms 12088 KB Output is correct
14 Correct 6 ms 11984 KB Output is correct
15 Correct 8 ms 11984 KB Output is correct
16 Correct 7 ms 12028 KB Output is correct
17 Correct 7 ms 12048 KB Output is correct
18 Correct 7 ms 12076 KB Output is correct
19 Correct 8 ms 12024 KB Output is correct
20 Correct 7 ms 11984 KB Output is correct
21 Correct 9 ms 12068 KB Output is correct
22 Correct 7 ms 11984 KB Output is correct
23 Correct 7 ms 12048 KB Output is correct
24 Correct 7 ms 11984 KB Output is correct
25 Correct 7 ms 12112 KB Output is correct
26 Correct 8 ms 12288 KB Output is correct
27 Correct 8 ms 12240 KB Output is correct
28 Correct 9 ms 12424 KB Output is correct
29 Correct 8 ms 12368 KB Output is correct
30 Correct 9 ms 12308 KB Output is correct
31 Correct 6 ms 11984 KB Output is correct
32 Correct 8 ms 12352 KB Output is correct
33 Correct 8 ms 12076 KB Output is correct
34 Correct 8 ms 12216 KB Output is correct
35 Correct 9 ms 12328 KB Output is correct
36 Correct 8 ms 12352 KB Output is correct
37 Correct 8 ms 12240 KB Output is correct
38 Correct 7 ms 12040 KB Output is correct
39 Correct 11 ms 12288 KB Output is correct
40 Correct 8 ms 12220 KB Output is correct
41 Correct 8 ms 12216 KB Output is correct
42 Correct 8 ms 12368 KB Output is correct
43 Correct 11 ms 12280 KB Output is correct
44 Correct 7 ms 11984 KB Output is correct
45 Correct 8 ms 12368 KB Output is correct
46 Correct 8 ms 12240 KB Output is correct
47 Correct 7 ms 11984 KB Output is correct
48 Correct 11 ms 12240 KB Output is correct
49 Correct 8 ms 12368 KB Output is correct
50 Correct 7 ms 12368 KB Output is correct
51 Correct 9 ms 12240 KB Output is correct
52 Correct 8 ms 12288 KB Output is correct
53 Correct 9 ms 12368 KB Output is correct
54 Correct 8 ms 12240 KB Output is correct
55 Correct 6 ms 11984 KB Output is correct
56 Correct 54 ms 19720 KB Output is correct
57 Correct 70 ms 19604 KB Output is correct
58 Correct 8 ms 12240 KB Output is correct
59 Correct 7 ms 12112 KB Output is correct
60 Correct 8 ms 12084 KB Output is correct
61 Correct 67 ms 19680 KB Output is correct
62 Correct 8 ms 12220 KB Output is correct
63 Correct 70 ms 22052 KB Output is correct
64 Correct 90 ms 19568 KB Output is correct
65 Correct 8 ms 12232 KB Output is correct
66 Correct 90 ms 19508 KB Output is correct
67 Correct 10 ms 12240 KB Output is correct
68 Correct 11 ms 12216 KB Output is correct
69 Correct 52 ms 19744 KB Output is correct
70 Correct 8 ms 12368 KB Output is correct
71 Correct 69 ms 19432 KB Output is correct
72 Correct 93 ms 20064 KB Output is correct
73 Correct 7 ms 12084 KB Output is correct
74 Correct 78 ms 22012 KB Output is correct
75 Correct 79 ms 21796 KB Output is correct
76 Correct 7 ms 12240 KB Output is correct
77 Correct 9 ms 12216 KB Output is correct
78 Correct 49 ms 19884 KB Output is correct
79 Correct 56 ms 21668 KB Output is correct
80 Correct 8 ms 12232 KB Output is correct
81 Correct 8 ms 12240 KB Output is correct
82 Correct 7 ms 11984 KB Output is correct
83 Correct 6 ms 12076 KB Output is correct
84 Correct 7 ms 12240 KB Output is correct
85 Correct 68 ms 20976 KB Output is correct
86 Correct 8 ms 12348 KB Output is correct
87 Correct 117 ms 20388 KB Output is correct
88 Correct 7 ms 12076 KB Output is correct
89 Correct 98 ms 19916 KB Output is correct
90 Correct 107 ms 20980 KB Output is correct
91 Correct 90 ms 21432 KB Output is correct
92 Correct 59 ms 19724 KB Output is correct
93 Correct 10 ms 12348 KB Output is correct
94 Correct 10 ms 12084 KB Output is correct
95 Correct 64 ms 21584 KB Output is correct
96 Correct 81 ms 22452 KB Output is correct
97 Correct 8 ms 12348 KB Output is correct
98 Correct 6 ms 12080 KB Output is correct
99 Correct 51 ms 21160 KB Output is correct
100 Correct 8 ms 12240 KB Output is correct
101 Correct 73 ms 20276 KB Output is correct
102 Correct 61 ms 23112 KB Output is correct
103 Correct 8 ms 12368 KB Output is correct
104 Correct 8 ms 12348 KB Output is correct
105 Correct 8 ms 12216 KB Output is correct
106 Correct 11 ms 12216 KB Output is correct
107 Correct 8 ms 12368 KB Output is correct
108 Correct 385 ms 58832 KB Output is correct
109 Correct 651 ms 54928 KB Output is correct
110 Correct 668 ms 59632 KB Output is correct
111 Correct 557 ms 67140 KB Output is correct
112 Correct 610 ms 68900 KB Output is correct
113 Correct 391 ms 60764 KB Output is correct
114 Correct 596 ms 50108 KB Output is correct
115 Correct 654 ms 50060 KB Output is correct
116 Correct 730 ms 55324 KB Output is correct
117 Correct 626 ms 60176 KB Output is correct
118 Correct 626 ms 52288 KB Output is correct
119 Correct 508 ms 60228 KB Output is correct
120 Correct 536 ms 69160 KB Output is correct
121 Correct 506 ms 60212 KB Output is correct
122 Correct 653 ms 58576 KB Output is correct
123 Correct 317 ms 61260 KB Output is correct
124 Correct 565 ms 56528 KB Output is correct