oj.uz

Submission #526420

# Submission time Handle Problem Language Result Execution time Memory
526420 2022-02-14T17:54:51 Z CPSC Capital City (JOI20_capital_city) C++14
11 / 100
 3000 ms 44356 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;
    for (int i = 0; i < vv[x].size(); i++) {
         q.push(vv[x][i]);
         viss[x] = 1;
    }
    int pas = 0;
    int ff = 0;
 
    vector <int> vvv;
    vvv.pb(x);
    //cout<<q.size()<<endl;
    //cout<<c<<"centroid"<<endl;
    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:48:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     for (int i = 0; i < vv[x].size(); i++) {
      |                     ~~^~~~~~~~~~~~~~
capital_city.cpp:74:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |             for (int i = 0; i < vv[col[parr]].size(); i++) {
      |                             ~~^~~~~~~~~~~~~~~~~~~~~~
capital_city.cpp:88:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |     for (int i = 0; i < vvv.size(); i++) viss[vvv[i]] = 0;
      |                     ~~^~~~~~~~~~~~
capital_city.cpp:93:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |     for (int i = 0; i < v[c].size(); i++) {
      |                     ~~^~~~~~~~~~~~~
capital_city.cpp: At global scope:
capital_city.cpp:97:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   97 | main() {
      | ^~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14412 KB Output is correct
2 Correct 8 ms 14436 KB Output is correct
3 Correct 8 ms 14412 KB Output is correct
4 Correct 10 ms 14412 KB Output is correct
5 Correct 8 ms 14412 KB Output is correct
6 Correct 8 ms 14412 KB Output is correct
7 Correct 8 ms 14412 KB Output is correct
8 Correct 7 ms 14412 KB Output is correct
9 Correct 8 ms 14412 KB Output is correct
10 Correct 8 ms 14412 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14412 KB Output is correct
2 Correct 8 ms 14436 KB Output is correct
3 Correct 8 ms 14412 KB Output is correct
4 Correct 10 ms 14412 KB Output is correct
5 Correct 8 ms 14412 KB Output is correct
6 Correct 8 ms 14412 KB Output is correct
7 Correct 8 ms 14412 KB Output is correct
8 Correct 7 ms 14412 KB Output is correct
9 Correct 8 ms 14412 KB Output is correct
10 Correct 8 ms 14412 KB Output is correct
11 Correct 9 ms 14540 KB Output is correct
12 Correct 10 ms 14540 KB Output is correct
13 Correct 13 ms 14480 KB Output is correct
14 Correct 13 ms 14544 KB Output is correct
15 Correct 10 ms 14544 KB Output is correct
16 Correct 16 ms 14512 KB Output is correct
17 Correct 15 ms 14672 KB Output is correct
18 Correct 18 ms 14660 KB Output is correct
19 Correct 15 ms 14580 KB Output is correct
20 Correct 15 ms 14696 KB Output is correct
21 Correct 15 ms 14700 KB Output is correct
22 Correct 8 ms 14672 KB Output is correct
23 Correct 9 ms 14668 KB Output is correct
24 Correct 8 ms 14540 KB Output is correct
25 Correct 11 ms 14668 KB Output is correct
26 Correct 11 ms 14680 KB Output is correct
27 Correct 10 ms 14704 KB Output is correct
28 Correct 11 ms 14596 KB Output is correct
29 Correct 12 ms 14544 KB Output is correct
30 Correct 11 ms 14540 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 592 ms 43680 KB Output is correct
2 Correct 251 ms 44356 KB Output is correct
3 Correct 632 ms 43360 KB Output is correct
4 Correct 232 ms 44304 KB Output is correct
5 Correct 2157 ms 41496 KB Output is correct
6 Correct 282 ms 44344 KB Output is correct
7 Execution timed out 3084 ms 42460 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 14412 KB Output is correct
2 Correct 8 ms 14436 KB Output is correct
3 Correct 8 ms 14412 KB Output is correct
4 Correct 10 ms 14412 KB Output is correct
5 Correct 8 ms 14412 KB Output is correct
6 Correct 8 ms 14412 KB Output is correct
7 Correct 8 ms 14412 KB Output is correct
8 Correct 7 ms 14412 KB Output is correct
9 Correct 8 ms 14412 KB Output is correct
10 Correct 8 ms 14412 KB Output is correct
11 Correct 9 ms 14540 KB Output is correct
12 Correct 10 ms 14540 KB Output is correct
13 Correct 13 ms 14480 KB Output is correct
14 Correct 13 ms 14544 KB Output is correct
15 Correct 10 ms 14544 KB Output is correct
16 Correct 16 ms 14512 KB Output is correct
17 Correct 15 ms 14672 KB Output is correct
18 Correct 18 ms 14660 KB Output is correct
19 Correct 15 ms 14580 KB Output is correct
20 Correct 15 ms 14696 KB Output is correct
21 Correct 15 ms 14700 KB Output is correct
22 Correct 8 ms 14672 KB Output is correct
23 Correct 9 ms 14668 KB Output is correct
24 Correct 8 ms 14540 KB Output is correct
25 Correct 11 ms 14668 KB Output is correct
26 Correct 11 ms 14680 KB Output is correct
27 Correct 10 ms 14704 KB Output is correct
28 Correct 11 ms 14596 KB Output is correct
29 Correct 12 ms 14544 KB Output is correct
30 Correct 11 ms 14540 KB Output is correct
31 Correct 592 ms 43680 KB Output is correct
32 Correct 251 ms 44356 KB Output is correct
33 Correct 632 ms 43360 KB Output is correct
34 Correct 232 ms 44304 KB Output is correct
35 Correct 2157 ms 41496 KB Output is correct
36 Correct 282 ms 44344 KB Output is correct
37 Execution timed out 3084 ms 42460 KB Time limit exceeded
38 Halted 0 ms 0 KB -