oj.uz

Submission #563872

# Submission time Handle Problem Language Result Execution time Memory
563872 2022-05-18T07:48:18 Z dantoh000 Mergers (JOI19_mergers) C++14
100 / 100
 943 ms 96660 KB 
#include <bits/stdc++.h>
using namespace std;
int n,k;
vector<int> G[1000005];
int c[1000005];
int low[1000005];
int num[1000005];
int p[1000005];
int ct = 0;

int pa[500005];
int eg[500005];
int rk[500005];
void init(int n){
    for (int i = 1; i <= n; i++){
        pa[i] = i; rk[i] = 0;
        eg[i] = 0;
    }
}
int fin(int x){
    return pa[x] == x ? x : pa[x] = fin(pa[x]);
}
void un(int x, int y){
    x = fin(x), y = fin(y);
    if (x == y) return;
    if (rk[x] < rk[y]) swap(x,y);
    pa[y] = x;
    eg[x] += eg[y];
    if (rk[x] == rk[y]) rk[x]++;
}

void dfs2(int u){
    for (auto v : G[u]){
        if (v <= n){
            if (v == p[u]) continue;
            p[v] = u;
            dfs2(v);
            if (low[v] <= num[u]){
                un(u,v);
            }
            else{
                //printf("bridge %d %d\n",u,v);
                eg[fin(u)]++;
                eg[fin(v)]++;
            }

        }
    }
}

void dfs(int u, int P){
    num[u] = low[u] = ct++;
    for (auto v : G[u]){
        if (num[v] == -1){
            //printf("%d -> %d\n",u,v);
            dfs(v, u);
            low[u] = min(low[v], low[u]);
        }
        else if (v != P){
            low[u] = min(num[v], low[u]);
        }
    }
}

int main(){
    scanf("%d%d",&n,&k);

    for (int i = 1; i < n; i++){
        int a,b;
        scanf("%d%d",&a,&b);
        G[a].push_back(b);
        G[b].push_back(a);
    }
    for (int i = 1; i <= n; i++){
        scanf("%d",&c[i]);
        G[i].push_back(n+c[i]);
        G[n+c[i]].push_back(i);
    }
    memset(low,-1,sizeof(low));
    memset(num,-1,sizeof(num));
    init(n);
    dfs(1,-1);
    p[1] = 0;
    dfs2(1);

    int ans = 0;
    for (int i = 1; i <= n; i++){
        if (i == pa[i] && eg[i] == 1) {
            //printf("%d ",i);
            ans++;
        }
    }
    printf("%d",(ans+1)/2);
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:66:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |     scanf("%d%d",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~
mergers.cpp:70:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         scanf("%d%d",&a,&b);
      |         ~~~~~^~~~~~~~~~~~~~
mergers.cpp:75:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |         scanf("%d",&c[i]);
      |         ~~~~~^~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 31572 KB Output is correct
2 Correct 15 ms 31572 KB Output is correct
3 Correct 16 ms 31700 KB Output is correct
4 Correct 16 ms 31572 KB Output is correct
5 Correct 16 ms 31600 KB Output is correct
6 Correct 17 ms 31556 KB Output is correct
7 Correct 17 ms 31572 KB Output is correct
8 Correct 16 ms 31572 KB Output is correct
9 Correct 15 ms 31572 KB Output is correct
10 Correct 16 ms 31572 KB Output is correct
11 Correct 16 ms 31596 KB Output is correct
12 Correct 15 ms 31560 KB Output is correct
13 Correct 17 ms 31596 KB Output is correct
14 Correct 15 ms 31568 KB Output is correct
15 Correct 15 ms 31572 KB Output is correct
16 Correct 16 ms 31596 KB Output is correct
17 Correct 16 ms 31552 KB Output is correct
18 Correct 17 ms 31596 KB Output is correct
19 Correct 16 ms 31640 KB Output is correct
20 Correct 16 ms 31600 KB Output is correct
21 Correct 15 ms 31572 KB Output is correct
22 Correct 15 ms 31600 KB Output is correct
23 Correct 15 ms 31572 KB Output is correct
24 Correct 16 ms 31552 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 31572 KB Output is correct
2 Correct 15 ms 31572 KB Output is correct
3 Correct 16 ms 31700 KB Output is correct
4 Correct 16 ms 31572 KB Output is correct
5 Correct 16 ms 31600 KB Output is correct
6 Correct 17 ms 31556 KB Output is correct
7 Correct 17 ms 31572 KB Output is correct
8 Correct 16 ms 31572 KB Output is correct
9 Correct 15 ms 31572 KB Output is correct
10 Correct 16 ms 31572 KB Output is correct
11 Correct 16 ms 31596 KB Output is correct
12 Correct 15 ms 31560 KB Output is correct
13 Correct 17 ms 31596 KB Output is correct
14 Correct 15 ms 31568 KB Output is correct
15 Correct 15 ms 31572 KB Output is correct
16 Correct 16 ms 31596 KB Output is correct
17 Correct 16 ms 31552 KB Output is correct
18 Correct 17 ms 31596 KB Output is correct
19 Correct 16 ms 31640 KB Output is correct
20 Correct 16 ms 31600 KB Output is correct
21 Correct 15 ms 31572 KB Output is correct
22 Correct 15 ms 31600 KB Output is correct
23 Correct 15 ms 31572 KB Output is correct
24 Correct 16 ms 31552 KB Output is correct
25 Correct 16 ms 31572 KB Output is correct
26 Correct 18 ms 31960 KB Output is correct
27 Correct 18 ms 31824 KB Output is correct
28 Correct 18 ms 31952 KB Output is correct
29 Correct 20 ms 31936 KB Output is correct
30 Correct 18 ms 31872 KB Output is correct
31 Correct 16 ms 31656 KB Output is correct
32 Correct 18 ms 32120 KB Output is correct
33 Correct 16 ms 31572 KB Output is correct
34 Correct 17 ms 31828 KB Output is correct
35 Correct 18 ms 31828 KB Output is correct
36 Correct 19 ms 31868 KB Output is correct
37 Correct 18 ms 31924 KB Output is correct
38 Correct 16 ms 31596 KB Output is correct
39 Correct 19 ms 31976 KB Output is correct
40 Correct 18 ms 31828 KB Output is correct
41 Correct 17 ms 31868 KB Output is correct
42 Correct 18 ms 31860 KB Output is correct
43 Correct 19 ms 32104 KB Output is correct
44 Correct 16 ms 31580 KB Output is correct
45 Correct 17 ms 31900 KB Output is correct
46 Correct 17 ms 31828 KB Output is correct
47 Correct 16 ms 31600 KB Output is correct
48 Correct 20 ms 31820 KB Output is correct
49 Correct 19 ms 31868 KB Output is correct
50 Correct 19 ms 31916 KB Output is correct
51 Correct 19 ms 31840 KB Output is correct
52 Correct 17 ms 31884 KB Output is correct
53 Correct 18 ms 31916 KB Output is correct
54 Correct 19 ms 31772 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 31572 KB Output is correct
2 Correct 15 ms 31572 KB Output is correct
3 Correct 16 ms 31700 KB Output is correct
4 Correct 16 ms 31572 KB Output is correct
5 Correct 16 ms 31600 KB Output is correct
6 Correct 17 ms 31556 KB Output is correct
7 Correct 17 ms 31572 KB Output is correct
8 Correct 16 ms 31572 KB Output is correct
9 Correct 15 ms 31572 KB Output is correct
10 Correct 16 ms 31572 KB Output is correct
11 Correct 16 ms 31596 KB Output is correct
12 Correct 15 ms 31560 KB Output is correct
13 Correct 17 ms 31596 KB Output is correct
14 Correct 15 ms 31568 KB Output is correct
15 Correct 15 ms 31572 KB Output is correct
16 Correct 16 ms 31596 KB Output is correct
17 Correct 16 ms 31552 KB Output is correct
18 Correct 17 ms 31596 KB Output is correct
19 Correct 16 ms 31640 KB Output is correct
20 Correct 16 ms 31600 KB Output is correct
21 Correct 15 ms 31572 KB Output is correct
22 Correct 15 ms 31600 KB Output is correct
23 Correct 15 ms 31572 KB Output is correct
24 Correct 16 ms 31552 KB Output is correct
25 Correct 17 ms 31572 KB Output is correct
26 Correct 75 ms 37992 KB Output is correct
27 Correct 88 ms 37840 KB Output is correct
28 Correct 17 ms 31828 KB Output is correct
29 Correct 16 ms 31540 KB Output is correct
30 Correct 17 ms 31604 KB Output is correct
31 Correct 87 ms 37864 KB Output is correct
32 Correct 18 ms 31868 KB Output is correct
33 Correct 106 ms 45280 KB Output is correct
34 Correct 92 ms 37876 KB Output is correct
35 Correct 18 ms 31828 KB Output is correct
36 Correct 96 ms 38424 KB Output is correct
37 Correct 18 ms 31828 KB Output is correct
38 Correct 18 ms 31828 KB Output is correct
39 Correct 77 ms 37984 KB Output is correct
40 Correct 19 ms 31996 KB Output is correct
41 Correct 86 ms 37836 KB Output is correct
42 Correct 105 ms 44532 KB Output is correct
43 Correct 18 ms 31572 KB Output is correct
44 Correct 102 ms 45108 KB Output is correct
45 Correct 95 ms 41328 KB Output is correct
46 Correct 18 ms 31772 KB Output is correct
47 Correct 18 ms 31828 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 37572 KB Output is correct
2 Correct 114 ms 40152 KB Output is correct
3 Correct 19 ms 31800 KB Output is correct
4 Correct 19 ms 31868 KB Output is correct
5 Correct 18 ms 31772 KB Output is correct
6 Correct 17 ms 31536 KB Output is correct
7 Correct 19 ms 31828 KB Output is correct
8 Correct 115 ms 38808 KB Output is correct
9 Correct 19 ms 31836 KB Output is correct
10 Correct 91 ms 37892 KB Output is correct
11 Correct 18 ms 31572 KB Output is correct
12 Correct 104 ms 37680 KB Output is correct
13 Correct 112 ms 38788 KB Output is correct
14 Correct 116 ms 40296 KB Output is correct
15 Correct 76 ms 37928 KB Output is correct
16 Correct 19 ms 31868 KB Output is correct
17 Correct 17 ms 31636 KB Output is correct
18 Correct 101 ms 40204 KB Output is correct
19 Correct 122 ms 44196 KB Output is correct
20 Correct 20 ms 31868 KB Output is correct
21 Correct 17 ms 31664 KB Output is correct
22 Correct 94 ms 38992 KB Output is correct
23 Correct 19 ms 31868 KB Output is correct
24 Correct 107 ms 38280 KB Output is correct
25 Correct 126 ms 42836 KB Output is correct
26 Correct 19 ms 31956 KB Output is correct
27 Correct 19 ms 31992 KB Output is correct
28 Correct 21 ms 31868 KB Output is correct
29 Correct 22 ms 31852 KB Output is correct
30 Correct 21 ms 31828 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 31572 KB Output is correct
2 Correct 15 ms 31572 KB Output is correct
3 Correct 16 ms 31700 KB Output is correct
4 Correct 16 ms 31572 KB Output is correct
5 Correct 16 ms 31600 KB Output is correct
6 Correct 17 ms 31556 KB Output is correct
7 Correct 17 ms 31572 KB Output is correct
8 Correct 16 ms 31572 KB Output is correct
9 Correct 15 ms 31572 KB Output is correct
10 Correct 16 ms 31572 KB Output is correct
11 Correct 16 ms 31596 KB Output is correct
12 Correct 15 ms 31560 KB Output is correct
13 Correct 17 ms 31596 KB Output is correct
14 Correct 15 ms 31568 KB Output is correct
15 Correct 15 ms 31572 KB Output is correct
16 Correct 16 ms 31596 KB Output is correct
17 Correct 16 ms 31552 KB Output is correct
18 Correct 17 ms 31596 KB Output is correct
19 Correct 16 ms 31640 KB Output is correct
20 Correct 16 ms 31600 KB Output is correct
21 Correct 15 ms 31572 KB Output is correct
22 Correct 15 ms 31600 KB Output is correct
23 Correct 15 ms 31572 KB Output is correct
24 Correct 16 ms 31552 KB Output is correct
25 Correct 16 ms 31572 KB Output is correct
26 Correct 18 ms 31960 KB Output is correct
27 Correct 18 ms 31824 KB Output is correct
28 Correct 18 ms 31952 KB Output is correct
29 Correct 20 ms 31936 KB Output is correct
30 Correct 18 ms 31872 KB Output is correct
31 Correct 16 ms 31656 KB Output is correct
32 Correct 18 ms 32120 KB Output is correct
33 Correct 16 ms 31572 KB Output is correct
34 Correct 17 ms 31828 KB Output is correct
35 Correct 18 ms 31828 KB Output is correct
36 Correct 19 ms 31868 KB Output is correct
37 Correct 18 ms 31924 KB Output is correct
38 Correct 16 ms 31596 KB Output is correct
39 Correct 19 ms 31976 KB Output is correct
40 Correct 18 ms 31828 KB Output is correct
41 Correct 17 ms 31868 KB Output is correct
42 Correct 18 ms 31860 KB Output is correct
43 Correct 19 ms 32104 KB Output is correct
44 Correct 16 ms 31580 KB Output is correct
45 Correct 17 ms 31900 KB Output is correct
46 Correct 17 ms 31828 KB Output is correct
47 Correct 16 ms 31600 KB Output is correct
48 Correct 20 ms 31820 KB Output is correct
49 Correct 19 ms 31868 KB Output is correct
50 Correct 19 ms 31916 KB Output is correct
51 Correct 19 ms 31840 KB Output is correct
52 Correct 17 ms 31884 KB Output is correct
53 Correct 18 ms 31916 KB Output is correct
54 Correct 19 ms 31772 KB Output is correct
55 Correct 17 ms 31572 KB Output is correct
56 Correct 75 ms 37992 KB Output is correct
57 Correct 88 ms 37840 KB Output is correct
58 Correct 17 ms 31828 KB Output is correct
59 Correct 16 ms 31540 KB Output is correct
60 Correct 17 ms 31604 KB Output is correct
61 Correct 87 ms 37864 KB Output is correct
62 Correct 18 ms 31868 KB Output is correct
63 Correct 106 ms 45280 KB Output is correct
64 Correct 92 ms 37876 KB Output is correct
65 Correct 18 ms 31828 KB Output is correct
66 Correct 96 ms 38424 KB Output is correct
67 Correct 18 ms 31828 KB Output is correct
68 Correct 18 ms 31828 KB Output is correct
69 Correct 77 ms 37984 KB Output is correct
70 Correct 19 ms 31996 KB Output is correct
71 Correct 86 ms 37836 KB Output is correct
72 Correct 105 ms 44532 KB Output is correct
73 Correct 18 ms 31572 KB Output is correct
74 Correct 102 ms 45108 KB Output is correct
75 Correct 95 ms 41328 KB Output is correct
76 Correct 18 ms 31772 KB Output is correct
77 Correct 18 ms 31828 KB Output is correct
78 Correct 76 ms 37572 KB Output is correct
79 Correct 114 ms 40152 KB Output is correct
80 Correct 19 ms 31800 KB Output is correct
81 Correct 19 ms 31868 KB Output is correct
82 Correct 18 ms 31772 KB Output is correct
83 Correct 17 ms 31536 KB Output is correct
84 Correct 19 ms 31828 KB Output is correct
85 Correct 115 ms 38808 KB Output is correct
86 Correct 19 ms 31836 KB Output is correct
87 Correct 91 ms 37892 KB Output is correct
88 Correct 18 ms 31572 KB Output is correct
89 Correct 104 ms 37680 KB Output is correct
90 Correct 112 ms 38788 KB Output is correct
91 Correct 116 ms 40296 KB Output is correct
92 Correct 76 ms 37928 KB Output is correct
93 Correct 19 ms 31868 KB Output is correct
94 Correct 17 ms 31636 KB Output is correct
95 Correct 101 ms 40204 KB Output is correct
96 Correct 122 ms 44196 KB Output is correct
97 Correct 20 ms 31868 KB Output is correct
98 Correct 17 ms 31664 KB Output is correct
99 Correct 94 ms 38992 KB Output is correct
100 Correct 19 ms 31868 KB Output is correct
101 Correct 107 ms 38280 KB Output is correct
102 Correct 126 ms 42836 KB Output is correct
103 Correct 19 ms 31956 KB Output is correct
104 Correct 19 ms 31992 KB Output is correct
105 Correct 21 ms 31868 KB Output is correct
106 Correct 22 ms 31852 KB Output is correct
107 Correct 21 ms 31828 KB Output is correct
108 Correct 652 ms 65888 KB Output is correct
109 Correct 800 ms 88096 KB Output is correct
110 Correct 816 ms 95672 KB Output is correct
111 Correct 943 ms 96660 KB Output is correct
112 Correct 874 ms 86780 KB Output is correct
113 Correct 642 ms 73504 KB Output is correct
114 Correct 647 ms 61464 KB Output is correct
115 Correct 638 ms 61312 KB Output is correct
116 Correct 813 ms 66372 KB Output is correct
117 Correct 816 ms 74156 KB Output is correct
118 Correct 636 ms 61772 KB Output is correct
119 Correct 833 ms 74220 KB Output is correct
120 Correct 855 ms 87652 KB Output is correct
121 Correct 792 ms 74208 KB Output is correct
122 Correct 900 ms 90008 KB Output is correct
123 Correct 615 ms 75028 KB Output is correct
124 Correct 874 ms 72680 KB Output is correct