oj.uz

Submission #217225

# Submission time Handle Problem Language Result Execution time Memory
217225 2020-03-29T09:09:47 Z DodgeBallMan Capital City (JOI20_capital_city) C++14
100 / 100
 1064 ms 38340 KB 
#include <bits/stdc++.h>
#define pii pair<int, int>
#define x first
#define y second
 
using namespace std;
 
const int N = 2e5 + 10;
int par[N], cc[N], sz[N], c[N], cnt[N], ans = 1e9, n, k;
bool chk[N];
vector<int> col[N], g[N];
queue<int> q;
 
int getsz( int u, int p ) { sz[u] = 1; for( int v : g[u] ) if( v != p && !chk[v] ) sz[u] += getsz( v, u ); return sz[u]; }
 
int findcen( int now, int p, int all, pii &ret ) {
	int mx = all - sz[now];
	for( int v : g[now] ) if( v != p && !chk[v] ) mx = max( mx, findcen( v, now, all, ret ) );
	ret = min( ret, pii( mx, now ) );
	return sz[now];
}
 
void dfs( int u, int p, bool fill ) {
    if( fill ) col[c[u]].emplace_back( u ), par[u] = p;
    else col[c[u]].clear(), par[u] = -1, cc[c[u]] = false;
    for( int v : g[u] ) if( v != p && !chk[v] ) dfs( v, u, fill ); 
}
 
void centroid( int u ) {
    pii ret( 1e9, -1 );
    getsz( u, u );
    findcen( u, u, sz[u], ret );
    u = ret.y;
    dfs( u, u, true );
    bool check = true;
    int cou = 1;
    q.emplace( c[u] ), cc[c[u]] = true;
    while( !q.empty() ) {
        int now = q.front(); q.pop();
        if( col[now].size() != cnt[now] ) { 
            check = false;
            break ;
        }
        for( int x : col[now] ) if( x != u && !cc[c[par[x]]] ) {
            cc[c[par[x]]] = true;
            cou++;
            q.emplace( c[par[x]] );
        }
    }
    while( !q.empty() ) q.pop();
    if( check ) ans = min( ans, cou );
    dfs( u, u, false ), chk[u] = true;
    for( int v : g[u] ) if( !chk[v] ) centroid( v );
 
}
 
int main()
{
    scanf("%d %d",&n,&k);
    for( int i = 1, a, b ; i < n ; i++ ) {
        scanf("%d %d",&a,&b);
        g[a].emplace_back( b ), g[b].emplace_back( a );
    }
    for( int i = 1 ; i <= n ; i++ ) {
        scanf("%d",&c[i]);
        cnt[c[i]]++;
    }
    centroid( 1 );
    printf("%d\n",ans-1);
    return 0;
}

Compilation message

capital_city.cpp: In function 'void centroid(int)':
capital_city.cpp:40:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if( col[now].size() != cnt[now] ) { 
             ~~~~~~~~~~~~~~~~^~~~~~~~~~~
capital_city.cpp: In function 'int main()':
capital_city.cpp:59:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~~
capital_city.cpp:61:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&a,&b);
         ~~~~~^~~~~~~~~~~~~~~
capital_city.cpp:65:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&c[i]);
         ~~~~~^~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 10 ms 9728 KB Output is correct
3 Correct 10 ms 9728 KB Output is correct
4 Correct 11 ms 9856 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 10 ms 9728 KB Output is correct
8 Correct 10 ms 9728 KB Output is correct
9 Correct 10 ms 9728 KB Output is correct
10 Correct 10 ms 9728 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 10 ms 9728 KB Output is correct
3 Correct 10 ms 9728 KB Output is correct
4 Correct 11 ms 9856 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 10 ms 9728 KB Output is correct
8 Correct 10 ms 9728 KB Output is correct
9 Correct 10 ms 9728 KB Output is correct
10 Correct 10 ms 9728 KB Output is correct
11 Correct 12 ms 9856 KB Output is correct
12 Correct 12 ms 9856 KB Output is correct
13 Correct 12 ms 9856 KB Output is correct
14 Correct 12 ms 9856 KB Output is correct
15 Correct 12 ms 9856 KB Output is correct
16 Correct 12 ms 9856 KB Output is correct
17 Correct 11 ms 9984 KB Output is correct
18 Correct 11 ms 9984 KB Output is correct
19 Correct 12 ms 9984 KB Output is correct
20 Correct 12 ms 9984 KB Output is correct
21 Correct 12 ms 9984 KB Output is correct
22 Correct 12 ms 10112 KB Output is correct
23 Correct 13 ms 9984 KB Output is correct
24 Correct 14 ms 9984 KB Output is correct
25 Correct 13 ms 9984 KB Output is correct
26 Correct 13 ms 9984 KB Output is correct
27 Correct 12 ms 9984 KB Output is correct
28 Correct 13 ms 9984 KB Output is correct
29 Correct 13 ms 9984 KB Output is correct
30 Correct 13 ms 9984 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 972 ms 37752 KB Output is correct
2 Correct 295 ms 38136 KB Output is correct
3 Correct 975 ms 37496 KB Output is correct
4 Correct 303 ms 38136 KB Output is correct
5 Correct 958 ms 34296 KB Output is correct
6 Correct 306 ms 38340 KB Output is correct
7 Correct 918 ms 34556 KB Output is correct
8 Correct 299 ms 37496 KB Output is correct
9 Correct 1018 ms 32604 KB Output is correct
10 Correct 1008 ms 30080 KB Output is correct
11 Correct 1064 ms 32868 KB Output is correct
12 Correct 1008 ms 35576 KB Output is correct
13 Correct 1006 ms 29560 KB Output is correct
14 Correct 1010 ms 35960 KB Output is correct
15 Correct 1018 ms 35704 KB Output is correct
16 Correct 1012 ms 30584 KB Output is correct
17 Correct 1008 ms 31224 KB Output is correct
18 Correct 1004 ms 31472 KB Output is correct
19 Correct 1006 ms 34392 KB Output is correct
20 Correct 996 ms 36812 KB Output is correct
21 Correct 10 ms 9728 KB Output is correct

Subtask #4
59.0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 10 ms 9728 KB Output is correct
3 Correct 10 ms 9728 KB Output is correct
4 Correct 11 ms 9856 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 10 ms 9728 KB Output is correct
8 Correct 10 ms 9728 KB Output is correct
9 Correct 10 ms 9728 KB Output is correct
10 Correct 10 ms 9728 KB Output is correct
11 Correct 12 ms 9856 KB Output is correct
12 Correct 12 ms 9856 KB Output is correct
13 Correct 12 ms 9856 KB Output is correct
14 Correct 12 ms 9856 KB Output is correct
15 Correct 12 ms 9856 KB Output is correct
16 Correct 12 ms 9856 KB Output is correct
17 Correct 11 ms 9984 KB Output is correct
18 Correct 11 ms 9984 KB Output is correct
19 Correct 12 ms 9984 KB Output is correct
20 Correct 12 ms 9984 KB Output is correct
21 Correct 12 ms 9984 KB Output is correct
22 Correct 12 ms 10112 KB Output is correct
23 Correct 13 ms 9984 KB Output is correct
24 Correct 14 ms 9984 KB Output is correct
25 Correct 13 ms 9984 KB Output is correct
26 Correct 13 ms 9984 KB Output is correct
27 Correct 12 ms 9984 KB Output is correct
28 Correct 13 ms 9984 KB Output is correct
29 Correct 13 ms 9984 KB Output is correct
30 Correct 13 ms 9984 KB Output is correct
31 Correct 972 ms 37752 KB Output is correct
32 Correct 295 ms 38136 KB Output is correct
33 Correct 975 ms 37496 KB Output is correct
34 Correct 303 ms 38136 KB Output is correct
35 Correct 958 ms 34296 KB Output is correct
36 Correct 306 ms 38340 KB Output is correct
37 Correct 918 ms 34556 KB Output is correct
38 Correct 299 ms 37496 KB Output is correct
39 Correct 1018 ms 32604 KB Output is correct
40 Correct 1008 ms 30080 KB Output is correct
41 Correct 1064 ms 32868 KB Output is correct
42 Correct 1008 ms 35576 KB Output is correct
43 Correct 1006 ms 29560 KB Output is correct
44 Correct 1010 ms 35960 KB Output is correct
45 Correct 1018 ms 35704 KB Output is correct
46 Correct 1012 ms 30584 KB Output is correct
47 Correct 1008 ms 31224 KB Output is correct
48 Correct 1004 ms 31472 KB Output is correct
49 Correct 1006 ms 34392 KB Output is correct
50 Correct 996 ms 36812 KB Output is correct
51 Correct 10 ms 9728 KB Output is correct
52 Correct 687 ms 20564 KB Output is correct
53 Correct 730 ms 20600 KB Output is correct
54 Correct 735 ms 20672 KB Output is correct
55 Correct 763 ms 20600 KB Output is correct
56 Correct 752 ms 20600 KB Output is correct
57 Correct 735 ms 20568 KB Output is correct
58 Correct 632 ms 24440 KB Output is correct
59 Correct 657 ms 24696 KB Output is correct
60 Correct 940 ms 24056 KB Output is correct
61 Correct 983 ms 23824 KB Output is correct
62 Correct 302 ms 38136 KB Output is correct
63 Correct 296 ms 38140 KB Output is correct
64 Correct 302 ms 37752 KB Output is correct
65 Correct 297 ms 38008 KB Output is correct
66 Correct 502 ms 29424 KB Output is correct
67 Correct 482 ms 29424 KB Output is correct
68 Correct 493 ms 29552 KB Output is correct
69 Correct 484 ms 29424 KB Output is correct
70 Correct 517 ms 29424 KB Output is correct
71 Correct 490 ms 29552 KB Output is correct
72 Correct 476 ms 29424 KB Output is correct
73 Correct 493 ms 29044 KB Output is correct
74 Correct 498 ms 29424 KB Output is correct
75 Correct 482 ms 29424 KB Output is correct
76 Correct 755 ms 28152 KB Output is correct
77 Correct 754 ms 26328 KB Output is correct
78 Correct 1018 ms 31224 KB Output is correct
79 Correct 1008 ms 29176 KB Output is correct
80 Correct 1004 ms 36348 KB Output is correct
81 Correct 1010 ms 32600 KB Output is correct
82 Correct 1018 ms 32924 KB Output is correct
83 Correct 1020 ms 29560 KB Output is correct
84 Correct 1020 ms 35448 KB Output is correct
85 Correct 1038 ms 33820 KB Output is correct
86 Correct 1010 ms 29048 KB Output is correct
87 Correct 1002 ms 31096 KB Output is correct
88 Correct 879 ms 32116 KB Output is correct
89 Correct 865 ms 28152 KB Output is correct
90 Correct 860 ms 27768 KB Output is correct
91 Correct 871 ms 30328 KB Output is correct
92 Correct 884 ms 28920 KB Output is correct
93 Correct 875 ms 28536 KB Output is correct
94 Correct 867 ms 28024 KB Output is correct
95 Correct 898 ms 29432 KB Output is correct
96 Correct 870 ms 28152 KB Output is correct
97 Correct 902 ms 30200 KB Output is correct