oj.uz

Submission #477099

# Submission time Handle Problem Language Result Execution time Memory
477099 2021-09-30T10:56:27 Z EIMONIM Meetings 2 (JOI21_meetings2) C++14
100 / 100
 552 ms 42516 KB 
#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ii> vii;
typedef vector<vii> vvii;
typedef vector<bool> vb;
typedef vector<vb> vvb;
#define x first
#define y second
#define pb push_back
#define loop(i,s,e) for(int i=(s);i<(e);i++)
#define loopr(i,s,e) for(int i=(e)-1;i>=(s);i--)
#define chkmax(a,b) a = max(a,b)
#define chkmin(a,b) a = min(a,b)
#define all(x) x.begin(),x.end()
const int INF = 1e9, MOD = 1e9 + 7;

template <class A, class B> pair<A,B> operator+(pair<A,B>& a, pair<A,B>& b) {
    return {a.x+b.x, a.y+b.y}; }
template <class A, class B> pair<A,B> operator-(pair<A,B>& a, pair<A,B>& b) {
    return {a.x-b.x, a.y-b.y}; }
template <class A, class B> istream& operator>>(istream& is, pair<A,B>& a) {
    return is >> a.x >> a.y; }
template <class A, class B> ostream& operator << (ostream& os, const pair<A,B>& a) {
    return os << "< " << a.x << " , " << a.y << " >"; }

template<class T> ostream &operator<<(ostream &os, vector<T> v) { os << '['; if (!v.empty()) { os << v[0]; loop(i, 1, v.size()) os << ',' << v[i]; } return os << ']'; }
template<class T> ostream &operator<<(ostream &os, set<T> v) { os << '{'; if (!v.empty()) { os << *v.begin(); for(auto it = ++v.begin(); it != v.end(); ++it) os << ',' << *it; } return os << '}'; }

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
auto DIST = uniform_int_distribution<int>(0, INF);


int n;
vi sz;
vvi g;
vi ans;
vvi dp;
int dfssz(int cur, int p=-1){
	for(int nei:g[cur]) if(nei!=p) sz[cur]+=dfssz(nei, cur);
	return ++sz[cur];
}
int cent(int cur, int p=-1){
	for(int nei:g[cur]) if(nei!=p && 2*sz[nei]>=n) return cent(nei, cur);
	return cur;
}
void merge(int a, int b, int curd){
	if (dp[a].size()<dp[b].size()) swap(dp[a], dp[b]);
	loop(i,1,dp[b].size()){
		chkmax(ans[2*i], dp[a][i] + dp[b][i] - 2 * curd+1);
		chkmax(dp[a][i], dp[b][i]);
	}
	loop(i,1,dp[b].size()) dp[a].pb(curd);
}
void dfs(int cur, int p=-1, int d=0){
	vii ch;
	for(int nei:g[cur]) if(nei!=p){
		dfs(nei, cur, d+1);
		ch.pb({dp[nei].size(), nei});
	}
	sort(all(ch));
	dp[cur] = {-1, d};
	for(auto c:ch) merge(cur, c.y, d);
}
int32_t main(int argc, char *argv[]){
    ios_base::sync_with_stdio(false);
	cin >> n; g = vvi(n);
	loop(i,1,n){
		int a,b; cin>>a>>b; a--, b--;
		g[a].pb(b), g[b].pb(a);
	}
	sz = vi(n);
	dfssz(0);
	int r = cent(0);
	ans = vi(n+1,1), dp = vvi(n);
	dfs(r);
	loop(i,1,n+1) cout<<ans[i]<<endl;
    return 0;
}
/*
color a
cls
g++ sol.cpp -o a & a
5
1 2
2 3
4 2
3 5


*/

Compilation message

meetings2.cpp: In function 'void merge(int, int, int)':
meetings2.cpp:13:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 | #define loop(i,s,e) for(int i=(s);i<(e);i++)
      |                                    ^
meetings2.cpp:51:2: note: in expansion of macro 'loop'
   51 |  loop(i,1,dp[b].size()){
      |  ^~~~
meetings2.cpp:13:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 | #define loop(i,s,e) for(int i=(s);i<(e);i++)
      |                                    ^
meetings2.cpp:55:2: note: in expansion of macro 'loop'
   55 |  loop(i,1,dp[b].size()) dp[a].pb(curd);
      |  ^~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 8 ms 844 KB Output is correct
23 Correct 8 ms 844 KB Output is correct
24 Correct 9 ms 844 KB Output is correct
25 Correct 8 ms 844 KB Output is correct
26 Correct 8 ms 844 KB Output is correct
27 Correct 9 ms 856 KB Output is correct
28 Correct 8 ms 844 KB Output is correct
29 Correct 8 ms 844 KB Output is correct
30 Correct 8 ms 844 KB Output is correct
31 Correct 8 ms 844 KB Output is correct
32 Correct 9 ms 928 KB Output is correct
33 Correct 8 ms 1100 KB Output is correct
34 Correct 11 ms 792 KB Output is correct
35 Correct 7 ms 844 KB Output is correct
36 Correct 9 ms 844 KB Output is correct
37 Correct 8 ms 836 KB Output is correct
38 Correct 9 ms 972 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 320 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 8 ms 844 KB Output is correct
23 Correct 8 ms 844 KB Output is correct
24 Correct 9 ms 844 KB Output is correct
25 Correct 8 ms 844 KB Output is correct
26 Correct 8 ms 844 KB Output is correct
27 Correct 9 ms 856 KB Output is correct
28 Correct 8 ms 844 KB Output is correct
29 Correct 8 ms 844 KB Output is correct
30 Correct 8 ms 844 KB Output is correct
31 Correct 8 ms 844 KB Output is correct
32 Correct 9 ms 928 KB Output is correct
33 Correct 8 ms 1100 KB Output is correct
34 Correct 11 ms 792 KB Output is correct
35 Correct 7 ms 844 KB Output is correct
36 Correct 9 ms 844 KB Output is correct
37 Correct 8 ms 836 KB Output is correct
38 Correct 9 ms 972 KB Output is correct
39 Correct 480 ms 32576 KB Output is correct
40 Correct 518 ms 32464 KB Output is correct
41 Correct 530 ms 33276 KB Output is correct
42 Correct 500 ms 33400 KB Output is correct
43 Correct 552 ms 33668 KB Output is correct
44 Correct 529 ms 33572 KB Output is correct
45 Correct 517 ms 35640 KB Output is correct
46 Correct 445 ms 42516 KB Output is correct
47 Correct 439 ms 29504 KB Output is correct
48 Correct 451 ms 30388 KB Output is correct
49 Correct 434 ms 30188 KB Output is correct
50 Correct 476 ms 30392 KB Output is correct
51 Correct 443 ms 36920 KB Output is correct