oj.uz

Submission #526423

# Submission time Handle Problem Language Result Execution time Memory
526423 2022-02-14T17:56:52 Z CPSC Capital City (JOI20_capital_city) C++14
41 / 100
 3000 ms 47584 KB 
# include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
using namespace std;
const int N = 3e5 + 5;
int  sz[N],par[N],col[N],viss[N],blocked[N],now[N],vis[N],ans,n,k,a,b;
vector <int> v[N],vv[N];
void dfs(int a, int p) {
    if (vis[a]) return ;
    sz[a] = 1;
    par[a] = p;
    now[a] = 1;
    for (int i = 0; i < v[a].size(); i++) {
        int to = v[a][i];
        //cout<<a<<"          "<<to<<endl;
        if (to == p || vis[to]) continue;
        dfs(to,a);
        sz[a] += sz[to];
    }
}
int find_centroid(int a, int p, int raod) {
    for (int i = 0; i < v[a].size(); i++) {
        int to = v[a][i];
        if (vis[to] || to == p) continue;
        if (sz[to] > raod/2) return find_centroid(to,a,raod);
    }
    return a;
}
void init(int a, int p) {
    if (vis[a]) return;
    now[a] = 0;
    for (int i = 0; i < v[a].size(); i++) {
        int to = v[a][i];
        if (to == p || vis[to]) continue;
         init(to,a);
    }
}
void init_centroid(int a, int p){ 
    dfs(a,p);
 
    int c = find_centroid(a, p ,sz[a]); 
    dfs(c,p);
    vis[c] = 1;
    par[c] = p;
    int x = col[c];
    queue <int> q;
    int ff = 0;
    for (int i = 0; i < vv[x].size(); i++) {
        int vert1 = vv[x][i];
        if (!now[vert1] | blocked[col[vert1]]) {
            ff = 1;
            break;
        }
         q.push(vv[x][i]);
         viss[x] = 1;
    }
    int pas = 0;
    vector <int> vvv;vvv.pb(x);
     if (!ff) {
        while (q.size()) {
            int vert = q.front();
            int parr = par[vert];
            if (!now[vert]) {
                ff = 1;break;
            }
            if (blocked[col[vert]]) {
                ff = 1;
                 break;
            }
            q.pop();
            if (parr == -1) continue;
            if (vert != c && par[vert] && !viss[col[parr]]) {
                pas++;
                 vvv.pb(col[parr]);
                for (int i = 0; i < vv[col[parr]].size(); i++) {
                    int vert1 = vv[col[parr]][i];
                    if (!now[vert1] || blocked[col[vert1]]) {
                        ff = 1;
                        break;
                    }
                     q.push(vert1);
                }if (ff) break;
                viss[col[parr]] = 1;
            }
        }
    }
    if (!ff) {
        ans = min(ans, pas);
    }
    for (int i = 0; i < vvv.size(); i++) viss[vvv[i]] = 0;
    init(a,p);
    blocked[col[c]] = 1;
    vis[c] = 1;
    
    for (int i = 0; i < v[c].size(); i++) {
        if(!vis[v[c][i]]) init_centroid(v[c][i],c);
    }
}
main() {
    std::ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    cin>>n>>k;
    ans = 1e9;
    for (int i = 1; i <= n - 1; i++) {
        cin>>a>>b;
        v[a].pb(b);
        v[b].pb(a);
    }
    for (int i = 1; i <= n; i++) {
        cin>>col[i];
        vv[col[i]].pb(i);
    } //cout<<endl<<endl;
    init_centroid(1,-1);
    cout<<ans<<endl;
}

Compilation message

capital_city.cpp: In function 'void dfs(int, int)':
capital_city.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for (int i = 0; i < v[a].size(); i++) {
      |                     ~~^~~~~~~~~~~~~
capital_city.cpp: In function 'int find_centroid(int, int, int)':
capital_city.cpp:23:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for (int i = 0; i < v[a].size(); i++) {
      |                     ~~^~~~~~~~~~~~~
capital_city.cpp: In function 'void init(int, int)':
capital_city.cpp:33:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for (int i = 0; i < v[a].size(); i++) {
      |                     ~~^~~~~~~~~~~~~
capital_city.cpp: In function 'void init_centroid(int, int)':
capital_city.cpp:49:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for (int i = 0; i < vv[x].size(); i++) {
      |                     ~~^~~~~~~~~~~~~~
capital_city.cpp:51:13: warning: suggest parentheses around operand of '!' or change '|' to '||' or '!' to '~' [-Wparentheses]
   51 |         if (!now[vert1] | blocked[col[vert1]]) {
      |             ^~~~~~~~~~~
capital_city.cpp:76:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |                 for (int i = 0; i < vv[col[parr]].size(); i++) {
      |                                 ~~^~~~~~~~~~~~~~~~~~~~~~
capital_city.cpp:91:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   91 |     for (int i = 0; i < vvv.size(); i++) viss[vvv[i]] = 0;
      |                     ~~^~~~~~~~~~~~
capital_city.cpp:96:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |     for (int i = 0; i < v[c].size(); i++) {
      |                     ~~^~~~~~~~~~~~~
capital_city.cpp: At global scope:
capital_city.cpp:100:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  100 | main() {
      | ^~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14412 KB Output is correct
2 Correct 11 ms 14420 KB Output is correct
3 Correct 9 ms 14412 KB Output is correct
4 Correct 8 ms 14412 KB Output is correct
5 Correct 8 ms 14332 KB Output is correct
6 Correct 8 ms 14372 KB Output is correct
7 Correct 8 ms 14416 KB Output is correct
8 Correct 8 ms 14424 KB Output is correct
9 Correct 8 ms 14328 KB Output is correct
10 Correct 8 ms 14340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14412 KB Output is correct
2 Correct 11 ms 14420 KB Output is correct
3 Correct 9 ms 14412 KB Output is correct
4 Correct 8 ms 14412 KB Output is correct
5 Correct 8 ms 14332 KB Output is correct
6 Correct 8 ms 14372 KB Output is correct
7 Correct 8 ms 14416 KB Output is correct
8 Correct 8 ms 14424 KB Output is correct
9 Correct 8 ms 14328 KB Output is correct
10 Correct 8 ms 14340 KB Output is correct
11 Correct 9 ms 14580 KB Output is correct
12 Correct 10 ms 14540 KB Output is correct
13 Correct 10 ms 14540 KB Output is correct
14 Correct 13 ms 14540 KB Output is correct
15 Correct 14 ms 14572 KB Output is correct
16 Correct 11 ms 14540 KB Output is correct
17 Correct 12 ms 14668 KB Output is correct
18 Correct 9 ms 14668 KB Output is correct
19 Correct 9 ms 14668 KB Output is correct
20 Correct 9 ms 14596 KB Output is correct
21 Correct 11 ms 14560 KB Output is correct
22 Correct 9 ms 14684 KB Output is correct
23 Correct 12 ms 14668 KB Output is correct
24 Correct 9 ms 14540 KB Output is correct
25 Correct 9 ms 14668 KB Output is correct
26 Correct 10 ms 14752 KB Output is correct
27 Correct 12 ms 14648 KB Output is correct
28 Correct 14 ms 14684 KB Output is correct
29 Correct 10 ms 14668 KB Output is correct
30 Correct 9 ms 14668 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 612 ms 45212 KB Output is correct
2 Correct 247 ms 45720 KB Output is correct
3 Correct 642 ms 44828 KB Output is correct
4 Correct 232 ms 45776 KB Output is correct
5 Correct 894 ms 42304 KB Output is correct
6 Correct 248 ms 45884 KB Output is correct
7 Correct 834 ms 42664 KB Output is correct
8 Correct 263 ms 47584 KB Output is correct
9 Correct 765 ms 42640 KB Output is correct
10 Correct 726 ms 40236 KB Output is correct
11 Correct 722 ms 43176 KB Output is correct
12 Correct 759 ms 45764 KB Output is correct
13 Correct 673 ms 39800 KB Output is correct
14 Correct 701 ms 46000 KB Output is correct
15 Correct 718 ms 45976 KB Output is correct
16 Correct 759 ms 41164 KB Output is correct
17 Correct 675 ms 41276 KB Output is correct
18 Correct 671 ms 41496 KB Output is correct
19 Correct 763 ms 44632 KB Output is correct
20 Correct 678 ms 46928 KB Output is correct
21 Correct 7 ms 14412 KB Output is correct

Subtask #4
0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 14412 KB Output is correct
2 Correct 11 ms 14420 KB Output is correct
3 Correct 9 ms 14412 KB Output is correct
4 Correct 8 ms 14412 KB Output is correct
5 Correct 8 ms 14332 KB Output is correct
6 Correct 8 ms 14372 KB Output is correct
7 Correct 8 ms 14416 KB Output is correct
8 Correct 8 ms 14424 KB Output is correct
9 Correct 8 ms 14328 KB Output is correct
10 Correct 8 ms 14340 KB Output is correct
11 Correct 9 ms 14580 KB Output is correct
12 Correct 10 ms 14540 KB Output is correct
13 Correct 10 ms 14540 KB Output is correct
14 Correct 13 ms 14540 KB Output is correct
15 Correct 14 ms 14572 KB Output is correct
16 Correct 11 ms 14540 KB Output is correct
17 Correct 12 ms 14668 KB Output is correct
18 Correct 9 ms 14668 KB Output is correct
19 Correct 9 ms 14668 KB Output is correct
20 Correct 9 ms 14596 KB Output is correct
21 Correct 11 ms 14560 KB Output is correct
22 Correct 9 ms 14684 KB Output is correct
23 Correct 12 ms 14668 KB Output is correct
24 Correct 9 ms 14540 KB Output is correct
25 Correct 9 ms 14668 KB Output is correct
26 Correct 10 ms 14752 KB Output is correct
27 Correct 12 ms 14648 KB Output is correct
28 Correct 14 ms 14684 KB Output is correct
29 Correct 10 ms 14668 KB Output is correct
30 Correct 9 ms 14668 KB Output is correct
31 Correct 612 ms 45212 KB Output is correct
32 Correct 247 ms 45720 KB Output is correct
33 Correct 642 ms 44828 KB Output is correct
34 Correct 232 ms 45776 KB Output is correct
35 Correct 894 ms 42304 KB Output is correct
36 Correct 248 ms 45884 KB Output is correct
37 Correct 834 ms 42664 KB Output is correct
38 Correct 263 ms 47584 KB Output is correct
39 Correct 765 ms 42640 KB Output is correct
40 Correct 726 ms 40236 KB Output is correct
41 Correct 722 ms 43176 KB Output is correct
42 Correct 759 ms 45764 KB Output is correct
43 Correct 673 ms 39800 KB Output is correct
44 Correct 701 ms 46000 KB Output is correct
45 Correct 718 ms 45976 KB Output is correct
46 Correct 759 ms 41164 KB Output is correct
47 Correct 675 ms 41276 KB Output is correct
48 Correct 671 ms 41496 KB Output is correct
49 Correct 763 ms 44632 KB Output is correct
50 Correct 678 ms 46928 KB Output is correct
51 Correct 7 ms 14412 KB Output is correct
52 Correct 474 ms 30892 KB Output is correct
53 Correct 497 ms 30616 KB Output is correct
54 Correct 502 ms 30596 KB Output is correct
55 Correct 455 ms 30852 KB Output is correct
56 Correct 485 ms 30600 KB Output is correct
57 Correct 471 ms 30684 KB Output is correct
58 Correct 539 ms 34600 KB Output is correct
59 Correct 447 ms 34600 KB Output is correct
60 Execution timed out 3060 ms 34032 KB Time limit exceeded
61 Halted 0 ms 0 KB -