| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 105453 |
2019-04-12T12:00:30 Z |
reality |
Mergers (JOI19_mergers) |
C++17 |
|
245 ms |
111080 KB |
#include "bits/stdc++.h"
using namespace std;
#define fi first
#define se second
#define ll long long
#define dbg(v) cerr<<#v<<" = "<<v<<'\n'
#define vi vector<int>
#define vl vector <ll>
#define pii pair<int,int>
#define vii vector < pii >
#define mp make_pair
#define db long double
#define pb push_back
#define all(s) s.begin(),s.end()
template < class P , class Q > ostream& operator<<(ostream& stream, pair < P , Q > v){ stream << "(" << v.fi << ',' << v.se << ")"; return stream;}
template < class T > ostream& operator<<(ostream& stream, const vector<T> v){ stream << "[ "; for (int i=0; i<(int)v.size(); i++) stream << v[i] << " "; stream << "]"; return stream;}
template < class T > T smin(T &a,T b) {if (a > b) a = b;return a;}
template < class T > T smax(T &a,T b) {if (a < b) a = b;return a;}
#define pp pair < pair < int , vi > , map < int , int > >
const int N = 1e6 + 5;
int cnt[N];
void comb(pp &a,pp & b) {
if (a.se.size() < b.se.size())
swap(a,b);
if (a.fi.se.size() < b.fi.se.size())
swap(a.fi.se,b.fi.se);
for (auto it : b.fi.se)
a.fi.se.pb(it);
a.fi.fi += b.fi.fi;
for (auto it : b.se) {
a.se[it.fi] += it.se;
a.fi.fi += a.se[it.fi] == cnt[it.fi] && it.se < cnt[it.fi];
}
b.fi.fi = 0;
b.fi.se.clear();
b.se.clear();
}
vi g[N];
int v[N];
int flag[N];
int deg[N];
pp M[N];
int R = 0;
void dfs(int node,int prev) {
M[node].fi.fi = cnt[v[node]] == 1;
M[node].fi.se.pb(node);
M[node].se[v[node]] = 1;
for (auto it : g[node]) {
if (it == prev)
continue;
dfs(it,node);
comb(M[node],M[it]);
}
if (M[node].fi.fi == M[node].se.size()) {
++R;
for (auto it : M[node].fi.se)
flag[it] = R;
M[node].fi.fi = 0;
M[node].fi.se.clear();
M[node].se.clear();
}
}
int main(void) {
int n,k;
cin.tie(0);
ios_base :: sync_with_stdio(0);
cin>>n>>k;
vii e;
for (int i = 1;i < n;++i) {
int a,b;
cin>>a>>b;
e.pb(mp(a,b));
g[a].pb(b);
g[b].pb(a);
}
for (int i = 1;i <= n;++i) {
cin>>v[i];
cnt[v[i]] += 1;
}
dfs(1,0);
if (R == 1) {
puts("0");
return 0;
}
if (R == 2) {
puts("1");
return 0;
}
int ans = 0;
for (auto it : e)
if (flag[it.fi] != flag[it.se])
++deg[flag[it.fi]],++deg[flag[it.se]];
for (int i = 1;i <= R;++i)
ans += deg[i] == 1;
cout << (ans - 1) << '\n';
return 0;
}
Compilation message
mergers.cpp: In function 'void dfs(int, int)':
mergers.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if (M[node].fi.fi == M[node].se.size()) {
~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
89 ms |
102136 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
89 ms |
102136 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
89 ms |
102136 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
202 ms |
110828 KB |
Output is correct |
| 2 |
Incorrect |
245 ms |
111080 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
89 ms |
102136 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
