oj.uz

Submission #172204

# Submission time Handle Problem Language Result Execution time Memory
172204 2019-12-31T14:56:13 Z gs18103 Mergers (JOI19_mergers) C++14
100 / 100
 1119 ms 129284 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define eb emplace_back
#define em emplace
#define all(v) v.begin(), v.end()

using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

const int MAX = 505050;
const int INF = 1e9;
const ll LINF = 1e18;

vector <int> g[MAX], s[MAX], ng[MAX];
vector <pii> E;
int num[MAX], low[MAX], cnt = 0, p[MAX], ans = 0;

int find(int x) {
    return p[x] == x ? x : p[x] = find(p[x]);
}

void uni(int x, int y) {
    x = find(x), y = find(y);
    if(x > y) swap(x, y);
    p[y] = x;
}

void dfs(int x, int pa) {
    low[x] = num[x] = ++cnt;
    bool flag = false;
    for(auto i : g[x]) {
        if(i == pa && !flag) {
            flag = true;
            continue;
        }
        if(num[i] != 0) low[x] = min(low[x], num[i]);
        else if(num[i] == 0) {
            dfs(i, x);
            low[x] = min(low[x], low[i]);
        }
    }
    for(auto i : g[x]) {
        if(i == pa) continue;
        if(low[i] > num[x]) E.eb(i, x);
        else uni(i, x);
    }
}

void ndfs(int x, int pa) {
    int tcnt = 0;
    for(auto i : ng[x]) {
        if(i == pa) continue;
        ndfs(i, x);
        tcnt++;
    }
    if(tcnt == 0 && x != 1) ans++;
    if(tcnt == 1 && x == 1) ans++;
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0);

    int n, k;
    cin >> n >> k;
    for(int i = 1; i < n; i++) {
        int u, v; cin >> u >> v;
        g[u].eb(v), g[v].eb(u);
    }
    for(int i = 1; i <= n; i++) {
        p[i] = i;
        int u; cin >> u;
        s[u].eb(i);
    }
    for(int i = 1; i <= k; i++) {
        for(int j = 1; j < s[i].size(); j++) {
            g[s[i][j-1]].eb(s[i][j]);
            g[s[i][j]].eb(s[i][j-1]);
        }
    }
    dfs(1, 0);
    for(auto i : E) {
        ng[find(i.fi)].eb(find(i.se));
        ng[find(i.se)].eb(find(i.fi));
    }
    ndfs(1, 0);
    cout << (ans + 1) / 2;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:78:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j = 1; j < s[i].size(); j++) {
                        ~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 35960 KB Output is correct
2 Correct 37 ms 35900 KB Output is correct
3 Correct 36 ms 35932 KB Output is correct
4 Correct 36 ms 35960 KB Output is correct
5 Correct 35 ms 35896 KB Output is correct
6 Correct 36 ms 35968 KB Output is correct
7 Correct 35 ms 35960 KB Output is correct
8 Correct 34 ms 35924 KB Output is correct
9 Correct 34 ms 35960 KB Output is correct
10 Correct 34 ms 35960 KB Output is correct
11 Correct 35 ms 35960 KB Output is correct
12 Correct 34 ms 35932 KB Output is correct
13 Correct 34 ms 35960 KB Output is correct
14 Correct 34 ms 36088 KB Output is correct
15 Correct 34 ms 35904 KB Output is correct
16 Correct 36 ms 35960 KB Output is correct
17 Correct 36 ms 35940 KB Output is correct
18 Correct 35 ms 35960 KB Output is correct
19 Correct 35 ms 35960 KB Output is correct
20 Correct 35 ms 35960 KB Output is correct
21 Correct 35 ms 35932 KB Output is correct
22 Correct 34 ms 35960 KB Output is correct
23 Correct 35 ms 35960 KB Output is correct
24 Correct 34 ms 35960 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 35960 KB Output is correct
2 Correct 37 ms 35900 KB Output is correct
3 Correct 36 ms 35932 KB Output is correct
4 Correct 36 ms 35960 KB Output is correct
5 Correct 35 ms 35896 KB Output is correct
6 Correct 36 ms 35968 KB Output is correct
7 Correct 35 ms 35960 KB Output is correct
8 Correct 34 ms 35924 KB Output is correct
9 Correct 34 ms 35960 KB Output is correct
10 Correct 34 ms 35960 KB Output is correct
11 Correct 35 ms 35960 KB Output is correct
12 Correct 34 ms 35932 KB Output is correct
13 Correct 34 ms 35960 KB Output is correct
14 Correct 34 ms 36088 KB Output is correct
15 Correct 34 ms 35904 KB Output is correct
16 Correct 36 ms 35960 KB Output is correct
17 Correct 36 ms 35940 KB Output is correct
18 Correct 35 ms 35960 KB Output is correct
19 Correct 35 ms 35960 KB Output is correct
20 Correct 35 ms 35960 KB Output is correct
21 Correct 35 ms 35932 KB Output is correct
22 Correct 34 ms 35960 KB Output is correct
23 Correct 35 ms 35960 KB Output is correct
24 Correct 34 ms 35960 KB Output is correct
25 Correct 34 ms 36088 KB Output is correct
26 Correct 36 ms 36216 KB Output is correct
27 Correct 38 ms 36088 KB Output is correct
28 Correct 39 ms 36444 KB Output is correct
29 Correct 39 ms 36380 KB Output is correct
30 Correct 41 ms 36316 KB Output is correct
31 Correct 35 ms 35960 KB Output is correct
32 Correct 36 ms 36472 KB Output is correct
33 Correct 35 ms 35912 KB Output is correct
34 Correct 35 ms 36088 KB Output is correct
35 Correct 37 ms 36348 KB Output is correct
36 Correct 36 ms 36216 KB Output is correct
37 Correct 33 ms 36216 KB Output is correct
38 Correct 34 ms 35940 KB Output is correct
39 Correct 37 ms 36344 KB Output is correct
40 Correct 38 ms 36340 KB Output is correct
41 Correct 38 ms 36216 KB Output is correct
42 Correct 38 ms 36208 KB Output is correct
43 Correct 37 ms 36344 KB Output is correct
44 Correct 35 ms 35916 KB Output is correct
45 Correct 38 ms 36216 KB Output is correct
46 Correct 36 ms 36216 KB Output is correct
47 Correct 34 ms 35960 KB Output is correct
48 Correct 37 ms 36216 KB Output is correct
49 Correct 36 ms 36344 KB Output is correct
50 Correct 36 ms 36348 KB Output is correct
51 Correct 39 ms 36132 KB Output is correct
52 Correct 37 ms 36088 KB Output is correct
53 Correct 38 ms 36188 KB Output is correct
54 Correct 39 ms 36348 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 35960 KB Output is correct
2 Correct 37 ms 35900 KB Output is correct
3 Correct 36 ms 35932 KB Output is correct
4 Correct 36 ms 35960 KB Output is correct
5 Correct 35 ms 35896 KB Output is correct
6 Correct 36 ms 35968 KB Output is correct
7 Correct 35 ms 35960 KB Output is correct
8 Correct 34 ms 35924 KB Output is correct
9 Correct 34 ms 35960 KB Output is correct
10 Correct 34 ms 35960 KB Output is correct
11 Correct 35 ms 35960 KB Output is correct
12 Correct 34 ms 35932 KB Output is correct
13 Correct 34 ms 35960 KB Output is correct
14 Correct 34 ms 36088 KB Output is correct
15 Correct 34 ms 35904 KB Output is correct
16 Correct 36 ms 35960 KB Output is correct
17 Correct 36 ms 35940 KB Output is correct
18 Correct 35 ms 35960 KB Output is correct
19 Correct 35 ms 35960 KB Output is correct
20 Correct 35 ms 35960 KB Output is correct
21 Correct 35 ms 35932 KB Output is correct
22 Correct 34 ms 35960 KB Output is correct
23 Correct 35 ms 35960 KB Output is correct
24 Correct 34 ms 35960 KB Output is correct
25 Correct 34 ms 35960 KB Output is correct
26 Correct 116 ms 42864 KB Output is correct
27 Correct 153 ms 49420 KB Output is correct
28 Correct 37 ms 36216 KB Output is correct
29 Correct 34 ms 35960 KB Output is correct
30 Correct 35 ms 35960 KB Output is correct
31 Correct 145 ms 44012 KB Output is correct
32 Correct 37 ms 36088 KB Output is correct
33 Correct 127 ms 51576 KB Output is correct
34 Correct 147 ms 48248 KB Output is correct
35 Correct 36 ms 36216 KB Output is correct
36 Correct 130 ms 43592 KB Output is correct
37 Correct 37 ms 36304 KB Output is correct
38 Correct 37 ms 36164 KB Output is correct
39 Correct 122 ms 42736 KB Output is correct
40 Correct 37 ms 36344 KB Output is correct
41 Correct 150 ms 49220 KB Output is correct
42 Correct 160 ms 51480 KB Output is correct
43 Correct 35 ms 35960 KB Output is correct
44 Correct 146 ms 51508 KB Output is correct
45 Correct 163 ms 50428 KB Output is correct
46 Correct 37 ms 36088 KB Output is correct
47 Correct 37 ms 36344 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 42804 KB Output is correct
2 Correct 129 ms 49748 KB Output is correct
3 Correct 39 ms 36392 KB Output is correct
4 Correct 36 ms 36192 KB Output is correct
5 Correct 35 ms 35992 KB Output is correct
6 Correct 35 ms 36032 KB Output is correct
7 Correct 37 ms 36192 KB Output is correct
8 Correct 145 ms 44280 KB Output is correct
9 Correct 37 ms 36216 KB Output is correct
10 Correct 145 ms 43256 KB Output is correct
11 Correct 34 ms 35960 KB Output is correct
12 Correct 136 ms 42616 KB Output is correct
13 Correct 148 ms 44536 KB Output is correct
14 Correct 161 ms 49304 KB Output is correct
15 Correct 122 ms 42808 KB Output is correct
16 Correct 37 ms 36120 KB Output is correct
17 Correct 35 ms 35960 KB Output is correct
18 Correct 129 ms 48608 KB Output is correct
19 Correct 162 ms 53868 KB Output is correct
20 Correct 36 ms 36220 KB Output is correct
21 Correct 34 ms 35960 KB Output is correct
22 Correct 130 ms 44700 KB Output is correct
23 Correct 37 ms 36224 KB Output is correct
24 Correct 146 ms 43516 KB Output is correct
25 Correct 159 ms 52204 KB Output is correct
26 Correct 37 ms 36344 KB Output is correct
27 Correct 37 ms 36344 KB Output is correct
28 Correct 36 ms 36128 KB Output is correct
29 Correct 35 ms 36088 KB Output is correct
30 Correct 36 ms 36216 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 35960 KB Output is correct
2 Correct 37 ms 35900 KB Output is correct
3 Correct 36 ms 35932 KB Output is correct
4 Correct 36 ms 35960 KB Output is correct
5 Correct 35 ms 35896 KB Output is correct
6 Correct 36 ms 35968 KB Output is correct
7 Correct 35 ms 35960 KB Output is correct
8 Correct 34 ms 35924 KB Output is correct
9 Correct 34 ms 35960 KB Output is correct
10 Correct 34 ms 35960 KB Output is correct
11 Correct 35 ms 35960 KB Output is correct
12 Correct 34 ms 35932 KB Output is correct
13 Correct 34 ms 35960 KB Output is correct
14 Correct 34 ms 36088 KB Output is correct
15 Correct 34 ms 35904 KB Output is correct
16 Correct 36 ms 35960 KB Output is correct
17 Correct 36 ms 35940 KB Output is correct
18 Correct 35 ms 35960 KB Output is correct
19 Correct 35 ms 35960 KB Output is correct
20 Correct 35 ms 35960 KB Output is correct
21 Correct 35 ms 35932 KB Output is correct
22 Correct 34 ms 35960 KB Output is correct
23 Correct 35 ms 35960 KB Output is correct
24 Correct 34 ms 35960 KB Output is correct
25 Correct 34 ms 36088 KB Output is correct
26 Correct 36 ms 36216 KB Output is correct
27 Correct 38 ms 36088 KB Output is correct
28 Correct 39 ms 36444 KB Output is correct
29 Correct 39 ms 36380 KB Output is correct
30 Correct 41 ms 36316 KB Output is correct
31 Correct 35 ms 35960 KB Output is correct
32 Correct 36 ms 36472 KB Output is correct
33 Correct 35 ms 35912 KB Output is correct
34 Correct 35 ms 36088 KB Output is correct
35 Correct 37 ms 36348 KB Output is correct
36 Correct 36 ms 36216 KB Output is correct
37 Correct 33 ms 36216 KB Output is correct
38 Correct 34 ms 35940 KB Output is correct
39 Correct 37 ms 36344 KB Output is correct
40 Correct 38 ms 36340 KB Output is correct
41 Correct 38 ms 36216 KB Output is correct
42 Correct 38 ms 36208 KB Output is correct
43 Correct 37 ms 36344 KB Output is correct
44 Correct 35 ms 35916 KB Output is correct
45 Correct 38 ms 36216 KB Output is correct
46 Correct 36 ms 36216 KB Output is correct
47 Correct 34 ms 35960 KB Output is correct
48 Correct 37 ms 36216 KB Output is correct
49 Correct 36 ms 36344 KB Output is correct
50 Correct 36 ms 36348 KB Output is correct
51 Correct 39 ms 36132 KB Output is correct
52 Correct 37 ms 36088 KB Output is correct
53 Correct 38 ms 36188 KB Output is correct
54 Correct 39 ms 36348 KB Output is correct
55 Correct 34 ms 35960 KB Output is correct
56 Correct 116 ms 42864 KB Output is correct
57 Correct 153 ms 49420 KB Output is correct
58 Correct 37 ms 36216 KB Output is correct
59 Correct 34 ms 35960 KB Output is correct
60 Correct 35 ms 35960 KB Output is correct
61 Correct 145 ms 44012 KB Output is correct
62 Correct 37 ms 36088 KB Output is correct
63 Correct 127 ms 51576 KB Output is correct
64 Correct 147 ms 48248 KB Output is correct
65 Correct 36 ms 36216 KB Output is correct
66 Correct 130 ms 43592 KB Output is correct
67 Correct 37 ms 36304 KB Output is correct
68 Correct 37 ms 36164 KB Output is correct
69 Correct 122 ms 42736 KB Output is correct
70 Correct 37 ms 36344 KB Output is correct
71 Correct 150 ms 49220 KB Output is correct
72 Correct 160 ms 51480 KB Output is correct
73 Correct 35 ms 35960 KB Output is correct
74 Correct 146 ms 51508 KB Output is correct
75 Correct 163 ms 50428 KB Output is correct
76 Correct 37 ms 36088 KB Output is correct
77 Correct 37 ms 36344 KB Output is correct
78 Correct 117 ms 42804 KB Output is correct
79 Correct 129 ms 49748 KB Output is correct
80 Correct 39 ms 36392 KB Output is correct
81 Correct 36 ms 36192 KB Output is correct
82 Correct 35 ms 35992 KB Output is correct
83 Correct 35 ms 36032 KB Output is correct
84 Correct 37 ms 36192 KB Output is correct
85 Correct 145 ms 44280 KB Output is correct
86 Correct 37 ms 36216 KB Output is correct
87 Correct 145 ms 43256 KB Output is correct
88 Correct 34 ms 35960 KB Output is correct
89 Correct 136 ms 42616 KB Output is correct
90 Correct 148 ms 44536 KB Output is correct
91 Correct 161 ms 49304 KB Output is correct
92 Correct 122 ms 42808 KB Output is correct
93 Correct 37 ms 36120 KB Output is correct
94 Correct 35 ms 35960 KB Output is correct
95 Correct 129 ms 48608 KB Output is correct
96 Correct 162 ms 53868 KB Output is correct
97 Correct 36 ms 36220 KB Output is correct
98 Correct 34 ms 35960 KB Output is correct
99 Correct 130 ms 44700 KB Output is correct
100 Correct 37 ms 36224 KB Output is correct
101 Correct 146 ms 43516 KB Output is correct
102 Correct 159 ms 52204 KB Output is correct
103 Correct 37 ms 36344 KB Output is correct
104 Correct 37 ms 36344 KB Output is correct
105 Correct 36 ms 36128 KB Output is correct
106 Correct 35 ms 36088 KB Output is correct
107 Correct 36 ms 36216 KB Output is correct
108 Correct 740 ms 77732 KB Output is correct
109 Correct 851 ms 113480 KB Output is correct
110 Correct 849 ms 114112 KB Output is correct
111 Correct 1080 ms 129284 KB Output is correct
112 Correct 913 ms 108104 KB Output is correct
113 Correct 810 ms 100796 KB Output is correct
114 Correct 823 ms 97320 KB Output is correct
115 Correct 823 ms 103524 KB Output is correct
116 Correct 940 ms 77824 KB Output is correct
117 Correct 946 ms 103864 KB Output is correct
118 Correct 827 ms 73352 KB Output is correct
119 Correct 1077 ms 103832 KB Output is correct
120 Correct 1018 ms 119868 KB Output is correct
121 Correct 952 ms 103888 KB Output is correct
122 Correct 1119 ms 102664 KB Output is correct
123 Correct 727 ms 106648 KB Output is correct
124 Correct 930 ms 95296 KB Output is correct