oj.uz

Submission #967014

# Submission time Handle Problem Language Result Execution time Memory
967014 2024-04-21T03:02:21 Z blackslex Capital City (JOI20_capital_city) C++17
100 / 100
 239 ms 58448 KB 
#include<bits/stdc++.h>

using namespace std;

int n, k, x, y;

int main() {
    scanf("%d %d", &n, &k);
    vector<int> c(n + 5), st(k + 5), ca(k + 5);
    vector<vector<int>> v(n + 5, vector<int>()), v2(k + 5, vector<int>()), rev(k + 5, vector<int>());
    for (int i = 1; i < n; i++) scanf("%d %d", &x, &y), v[x].emplace_back(y), v[y].emplace_back(x);
    for (int i = 1; i <= n; i++) scanf("%d", &c[i]), ca[c[i]]++;
    int t = 0;
    vector<int> sz(n + 5), hv(n + 5), pos(n + 5), tin(n + 5), tout(n + 5);
    function<void(int, int)> dfs = [&] (int cur, int par) {
        tin[cur] = ++t; pos[t] = cur; sz[cur] = 1;
        for (auto &e: v[cur]) {
            if (par == e) continue;
            dfs(e, cur); sz[cur] += sz[e];
            if (sz[e] > sz[hv[cur]]) hv[cur] = e;
        }
        tout[cur] = t;
    };
    vector<int> col(n + 5), cnt(k + 5);
    auto add = [&] (int idx) {
        cnt[c[idx]]++;
    };
    auto del = [&] (int idx) {
        cnt[c[idx]]--;
    };
    function<void(int, int, bool)> dfs2 = [&] (int cur, int par, bool ck) {
        for (auto &e: v[cur]) if (par != e && hv[cur] != e) dfs2(e, cur, 1);
        if (hv[cur]) dfs2(hv[cur], cur, 0); add(cur);
        for (auto &e: v[cur]) if (par != e && hv[cur] != e) for (int i = tin[e]; i <= tout[e]; i++) add(pos[i]);
        col[cur] = cnt[c[cur]];
        if (ck) for (int i = tin[cur]; i <= tout[cur]; i++) del(pos[i]);
    };
    dfs(1, 0);
    dfs2(1, 0, 0);
    int ans = 1e9;
    vector<int> indeg(k + 5), outdeg(k + 5);
    function<void(int, int)> dfs3 = [&] (int cur, int par) {
        if (par && c[cur] != c[par]) {
            // cerr << cur << ' ' << ca[c[cur]] << ' ' << col[cur] << '\n';
            if (ca[c[cur]] - col[cur]) v2[c[cur]].emplace_back(c[par]), indeg[c[par]]++, outdeg[c[cur]]++, rev[c[par]].emplace_back(c[cur]);
        }
        for (auto &e: v[cur]) {
            if (par == e) continue;
            dfs3(e, cur);
        }
    };
    dfs3(1, 0);
    queue<int> q;
    for (int i = 1; i <= k; i++) if (!indeg[i]) q.emplace(i);
    while (!q.empty()) {
        int cur = q.front(); q.pop();
        for (auto &e: v2[cur]) if (!(--indeg[e])) q.emplace(e);
    }
    stack<int> cst;
    int csz = 0;
    vector<bool> f(k + 5), f2(k + 5);
    function<void(int, int)> dfs4 = [&] (int cur, int par) {
        if (f[cur]) return; f[cur] = 1;
        for (auto &e: v2[cur]) {
            if (par == e) continue;
            dfs4(e, cur);
        }
        cst.emplace(cur);
    };
    function<void(int, int)> dfs5 = [&] (int cur, int par) {
        if (f2[cur]) return; f2[cur] = 1; csz++;
        for (auto &e: rev[cur]) {
            if (par == e) continue;
            dfs5(e, cur);
        }
    };
    for (int i = 1; i <= k; i++) if (!outdeg[i]) ans = 0;
    for (int i = 1; i <= k; i++) if (!indeg[i]) f[i] = f2[i] = 1;
    for (int i = 1; i <= k; i++) if (!f[i]) dfs4(i, 0);
    while (!cst.empty()) {
        int cur = cst.top(); cst.pop();
        if (f2[cur]) continue; csz = 0;
        dfs5(cur, 0);
        ans = min(ans, csz - 1);
    }
    printf("%d", ans);
}

Compilation message

capital_city.cpp: In lambda function:
capital_city.cpp:33:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   33 |         if (hv[cur]) dfs2(hv[cur], cur, 0); add(cur);
      |         ^~
capital_city.cpp:33:45: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   33 |         if (hv[cur]) dfs2(hv[cur], cur, 0); add(cur);
      |                                             ^~~
capital_city.cpp: In lambda function:
capital_city.cpp:63:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   63 |         if (f[cur]) return; f[cur] = 1;
      |         ^~
capital_city.cpp:63:29: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   63 |         if (f[cur]) return; f[cur] = 1;
      |                             ^
capital_city.cpp: In lambda function:
capital_city.cpp:71:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   71 |         if (f2[cur]) return; f2[cur] = 1; csz++;
      |         ^~
capital_city.cpp:71:30: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   71 |         if (f2[cur]) return; f2[cur] = 1; csz++;
      |                              ^~
capital_city.cpp: In function 'int main()':
capital_city.cpp:82:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   82 |         if (f2[cur]) continue; csz = 0;
      |         ^~
capital_city.cpp:82:32: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   82 |         if (f2[cur]) continue; csz = 0;
      |                                ^~~
capital_city.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     scanf("%d %d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~
capital_city.cpp:11:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     for (int i = 1; i < n; i++) scanf("%d %d", &x, &y), v[x].emplace_back(y), v[y].emplace_back(x);
      |                                 ~~~~~^~~~~~~~~~~~~~~~~
capital_city.cpp:12:39: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     for (int i = 1; i <= n; i++) scanf("%d", &c[i]), ca[c[i]]++;
      |                                  ~~~~~^~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 2 ms 600 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 704 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 1 ms 860 KB Output is correct
23 Correct 1 ms 856 KB Output is correct
24 Correct 1 ms 856 KB Output is correct
25 Correct 1 ms 860 KB Output is correct
26 Correct 1 ms 860 KB Output is correct
27 Correct 2 ms 860 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 2 ms 604 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 184 ms 57656 KB Output is correct
2 Correct 103 ms 58448 KB Output is correct
3 Correct 188 ms 57188 KB Output is correct
4 Correct 116 ms 58328 KB Output is correct
5 Correct 163 ms 51520 KB Output is correct
6 Correct 104 ms 58276 KB Output is correct
7 Correct 179 ms 51640 KB Output is correct
8 Correct 102 ms 56148 KB Output is correct
9 Correct 165 ms 46176 KB Output is correct
10 Correct 165 ms 42064 KB Output is correct
11 Correct 185 ms 46928 KB Output is correct
12 Correct 226 ms 51072 KB Output is correct
13 Correct 164 ms 41556 KB Output is correct
14 Correct 179 ms 51504 KB Output is correct
15 Correct 172 ms 51104 KB Output is correct
16 Correct 226 ms 43056 KB Output is correct
17 Correct 195 ms 44036 KB Output is correct
18 Correct 171 ms 44204 KB Output is correct
19 Correct 176 ms 49200 KB Output is correct
20 Correct 165 ms 52812 KB Output is correct
21 Correct 0 ms 344 KB Output is correct

Subtask #4
59.0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 856 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 2 ms 600 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 704 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 1 ms 860 KB Output is correct
23 Correct 1 ms 856 KB Output is correct
24 Correct 1 ms 856 KB Output is correct
25 Correct 1 ms 860 KB Output is correct
26 Correct 1 ms 860 KB Output is correct
27 Correct 2 ms 860 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 2 ms 604 KB Output is correct
31 Correct 184 ms 57656 KB Output is correct
32 Correct 103 ms 58448 KB Output is correct
33 Correct 188 ms 57188 KB Output is correct
34 Correct 116 ms 58328 KB Output is correct
35 Correct 163 ms 51520 KB Output is correct
36 Correct 104 ms 58276 KB Output is correct
37 Correct 179 ms 51640 KB Output is correct
38 Correct 102 ms 56148 KB Output is correct
39 Correct 165 ms 46176 KB Output is correct
40 Correct 165 ms 42064 KB Output is correct
41 Correct 185 ms 46928 KB Output is correct
42 Correct 226 ms 51072 KB Output is correct
43 Correct 164 ms 41556 KB Output is correct
44 Correct 179 ms 51504 KB Output is correct
45 Correct 172 ms 51104 KB Output is correct
46 Correct 226 ms 43056 KB Output is correct
47 Correct 195 ms 44036 KB Output is correct
48 Correct 171 ms 44204 KB Output is correct
49 Correct 176 ms 49200 KB Output is correct
50 Correct 165 ms 52812 KB Output is correct
51 Correct 0 ms 344 KB Output is correct
52 Correct 175 ms 26028 KB Output is correct
53 Correct 163 ms 26096 KB Output is correct
54 Correct 171 ms 25936 KB Output is correct
55 Correct 239 ms 25984 KB Output is correct
56 Correct 162 ms 26100 KB Output is correct
57 Correct 199 ms 25940 KB Output is correct
58 Correct 209 ms 34364 KB Output is correct
59 Correct 157 ms 35416 KB Output is correct
60 Correct 181 ms 34384 KB Output is correct
61 Correct 193 ms 33620 KB Output is correct
62 Correct 105 ms 58336 KB Output is correct
63 Correct 112 ms 58320 KB Output is correct
64 Correct 104 ms 56660 KB Output is correct
65 Correct 111 ms 58288 KB Output is correct
66 Correct 149 ms 38856 KB Output is correct
67 Correct 150 ms 38628 KB Output is correct
68 Correct 157 ms 38876 KB Output is correct
69 Correct 129 ms 38860 KB Output is correct
70 Correct 154 ms 39060 KB Output is correct
71 Correct 137 ms 38860 KB Output is correct
72 Correct 131 ms 38860 KB Output is correct
73 Correct 134 ms 37484 KB Output is correct
74 Correct 151 ms 39012 KB Output is correct
75 Correct 137 ms 38728 KB Output is correct
76 Correct 162 ms 42576 KB Output is correct
77 Correct 175 ms 39508 KB Output is correct
78 Correct 169 ms 43856 KB Output is correct
79 Correct 170 ms 40784 KB Output is correct
80 Correct 205 ms 52052 KB Output is correct
81 Correct 164 ms 46420 KB Output is correct
82 Correct 165 ms 46676 KB Output is correct
83 Correct 176 ms 41540 KB Output is correct
84 Correct 168 ms 50972 KB Output is correct
85 Correct 162 ms 48184 KB Output is correct
86 Correct 198 ms 40696 KB Output is correct
87 Correct 165 ms 43344 KB Output is correct
88 Correct 165 ms 44628 KB Output is correct
89 Correct 167 ms 38480 KB Output is correct
90 Correct 150 ms 38056 KB Output is correct
91 Correct 162 ms 41812 KB Output is correct
92 Correct 158 ms 39508 KB Output is correct
93 Correct 178 ms 39252 KB Output is correct
94 Correct 163 ms 38264 KB Output is correct
95 Correct 179 ms 40532 KB Output is correct
96 Correct 158 ms 38600 KB Output is correct
97 Correct 152 ms 41708 KB Output is correct