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답안 #913983

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
913983 2024-01-20T16:41:10 Z MilosMilutinovic Hard route (IZhO17_road) C++14
100 / 100
 688 ms 93160 KB 
#include<bits/stdc++.h>
 
#define pb push_back
#define fi first
#define se second
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
 
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
 
ll readint(){
	ll x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}
 
int n,tot;
int mx[500005],cnt[500005];
vector<int> g[500005];
ll res=0,c=1;
 
void addedge(int x,int y){ g[x].pb(y); g[y].pb(x); }
 
void dfs(int x,int px,int d){
	mx[x]=d;
	cnt[x]=1;
	for(auto&v:g[x]){
		if(v==px) continue;
		dfs(v,x,d+1);
		if(mx[v]==mx[x]) cnt[x]+=cnt[v];
		else if(mx[x]<mx[v]) cnt[x]=cnt[v];
		mx[x]=max(mx[x],mx[v]);
	}
}
 
void reroot(int x,int px,int dep){
	for(auto&v:g[x]){
		if(v!=px) mx[v]-=dep;
	}
	sort(g[x].begin(),g[x].end(),[&](int i,int j){return mx[i]>mx[j];});
	if((int)g[x].size()>=3){
		ll cur=0,cc=0;
		cur=mx[g[x][0]]*1ll*(mx[g[x][1]]+mx[g[x][2]]);
		ll s=0;
		for(int j=0;j<(int)g[x].size();j++){
			if(mx[g[x][j]]==mx[g[x][2]]) cc+=s*cnt[g[x][j]];
			if(mx[g[x][j]]==mx[g[x][1]]) s+=cnt[g[x][j]];
		}
		if(res<cur) res=cur,c=cc;
		else if(res==cur) c+=cc;
	}
	int mx_bef=mx[x],cnt_bef=cnt[x];
	int a=0,b=1,c=-1,d=0;
	for(auto&v:g[x]){
		if(mx[v]>a) c=a,d=b,a=mx[v],b=cnt[v];
		else if(mx[v]==a) b+=cnt[v];
		else if(mx[v]>c) c=mx[v],d=cnt[v];
		else if(mx[v]==c) d+=cnt[v];
	}
	for(auto&v:g[x]){
		if(v==px) continue;
		mx[x]=(mx[v]==a&&cnt[v]==b?c:a)+1;
		cnt[x]=(mx[v]==a&&cnt[v]==b?d:b-(mx[v]==a?cnt[v]:0));
		reroot(v,x,dep+1);
	}
	mx[x]=mx_bef;
	cnt[x]=cnt_bef;
}
 
int main(){
	n=readint();
	for(int i=1;i<n;i++) addedge(readint(),readint());
	dfs(1,1,0);
	reroot(1,1,0);
	printf("%lld %lld\n",res,c);
	return 0;
}

Subtask #1
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 14940 KB Output is correct
2 Correct 4 ms 14940 KB Output is correct
3 Correct 4 ms 14940 KB Output is correct
4 Correct 4 ms 14960 KB Output is correct
5 Correct 5 ms 14940 KB Output is correct
6 Correct 4 ms 14940 KB Output is correct
7 Correct 4 ms 14940 KB Output is correct
8 Correct 6 ms 14940 KB Output is correct
9 Correct 5 ms 14936 KB Output is correct
10 Correct 4 ms 14956 KB Output is correct
11 Correct 4 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 7 ms 14940 KB Output is correct
14 Correct 5 ms 14940 KB Output is correct
15 Correct 4 ms 14940 KB Output is correct
16 Correct 4 ms 14940 KB Output is correct
17 Correct 4 ms 14940 KB Output is correct
18 Correct 7 ms 14936 KB Output is correct
19 Correct 5 ms 14940 KB Output is correct
20 Correct 4 ms 14940 KB Output is correct
21 Correct 4 ms 14940 KB Output is correct
22 Correct 5 ms 14956 KB Output is correct
23 Correct 4 ms 14936 KB Output is correct
24 Correct 4 ms 14936 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 14940 KB Output is correct
2 Correct 4 ms 14940 KB Output is correct
3 Correct 4 ms 14940 KB Output is correct
4 Correct 4 ms 14960 KB Output is correct
5 Correct 5 ms 14940 KB Output is correct
6 Correct 4 ms 14940 KB Output is correct
7 Correct 4 ms 14940 KB Output is correct
8 Correct 6 ms 14940 KB Output is correct
9 Correct 5 ms 14936 KB Output is correct
10 Correct 4 ms 14956 KB Output is correct
11 Correct 4 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 7 ms 14940 KB Output is correct
14 Correct 5 ms 14940 KB Output is correct
15 Correct 4 ms 14940 KB Output is correct
16 Correct 4 ms 14940 KB Output is correct
17 Correct 4 ms 14940 KB Output is correct
18 Correct 7 ms 14936 KB Output is correct
19 Correct 5 ms 14940 KB Output is correct
20 Correct 4 ms 14940 KB Output is correct
21 Correct 4 ms 14940 KB Output is correct
22 Correct 5 ms 14956 KB Output is correct
23 Correct 4 ms 14936 KB Output is correct
24 Correct 4 ms 14936 KB Output is correct
25 Correct 5 ms 15196 KB Output is correct
26 Correct 5 ms 15196 KB Output is correct
27 Correct 5 ms 15196 KB Output is correct
28 Correct 5 ms 15196 KB Output is correct
29 Correct 6 ms 15196 KB Output is correct
30 Correct 5 ms 15196 KB Output is correct
31 Correct 5 ms 15196 KB Output is correct
32 Correct 6 ms 15192 KB Output is correct
33 Correct 5 ms 15196 KB Output is correct
34 Correct 6 ms 15192 KB Output is correct
35 Correct 5 ms 15196 KB Output is correct
36 Correct 5 ms 15196 KB Output is correct
37 Correct 5 ms 15452 KB Output is correct
38 Correct 5 ms 15452 KB Output is correct
39 Correct 5 ms 15196 KB Output is correct
40 Correct 5 ms 15196 KB Output is correct
41 Correct 6 ms 14940 KB Output is correct
42 Correct 5 ms 14936 KB Output is correct
43 Correct 6 ms 14940 KB Output is correct
44 Correct 4 ms 14940 KB Output is correct
45 Correct 5 ms 14940 KB Output is correct
46 Correct 6 ms 15192 KB Output is correct
47 Correct 5 ms 15140 KB Output is correct
48 Correct 5 ms 14940 KB Output is correct

Subtask #3
48.0 / 48.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 14940 KB Output is correct
2 Correct 4 ms 14940 KB Output is correct
3 Correct 4 ms 14940 KB Output is correct
4 Correct 4 ms 14960 KB Output is correct
5 Correct 5 ms 14940 KB Output is correct
6 Correct 4 ms 14940 KB Output is correct
7 Correct 4 ms 14940 KB Output is correct
8 Correct 6 ms 14940 KB Output is correct
9 Correct 5 ms 14936 KB Output is correct
10 Correct 4 ms 14956 KB Output is correct
11 Correct 4 ms 14940 KB Output is correct
12 Correct 3 ms 14940 KB Output is correct
13 Correct 7 ms 14940 KB Output is correct
14 Correct 5 ms 14940 KB Output is correct
15 Correct 4 ms 14940 KB Output is correct
16 Correct 4 ms 14940 KB Output is correct
17 Correct 4 ms 14940 KB Output is correct
18 Correct 7 ms 14936 KB Output is correct
19 Correct 5 ms 14940 KB Output is correct
20 Correct 4 ms 14940 KB Output is correct
21 Correct 4 ms 14940 KB Output is correct
22 Correct 5 ms 14956 KB Output is correct
23 Correct 4 ms 14936 KB Output is correct
24 Correct 4 ms 14936 KB Output is correct
25 Correct 5 ms 15196 KB Output is correct
26 Correct 5 ms 15196 KB Output is correct
27 Correct 5 ms 15196 KB Output is correct
28 Correct 5 ms 15196 KB Output is correct
29 Correct 6 ms 15196 KB Output is correct
30 Correct 5 ms 15196 KB Output is correct
31 Correct 5 ms 15196 KB Output is correct
32 Correct 6 ms 15192 KB Output is correct
33 Correct 5 ms 15196 KB Output is correct
34 Correct 6 ms 15192 KB Output is correct
35 Correct 5 ms 15196 KB Output is correct
36 Correct 5 ms 15196 KB Output is correct
37 Correct 5 ms 15452 KB Output is correct
38 Correct 5 ms 15452 KB Output is correct
39 Correct 5 ms 15196 KB Output is correct
40 Correct 5 ms 15196 KB Output is correct
41 Correct 6 ms 14940 KB Output is correct
42 Correct 5 ms 14936 KB Output is correct
43 Correct 6 ms 14940 KB Output is correct
44 Correct 4 ms 14940 KB Output is correct
45 Correct 5 ms 14940 KB Output is correct
46 Correct 6 ms 15192 KB Output is correct
47 Correct 5 ms 15140 KB Output is correct
48 Correct 5 ms 14940 KB Output is correct
49 Correct 421 ms 52052 KB Output is correct
50 Correct 419 ms 56144 KB Output is correct
51 Correct 352 ms 59396 KB Output is correct
52 Correct 400 ms 47928 KB Output is correct
53 Correct 276 ms 53800 KB Output is correct
54 Correct 349 ms 57560 KB Output is correct
55 Correct 274 ms 48560 KB Output is correct
56 Correct 284 ms 52412 KB Output is correct
57 Correct 329 ms 61456 KB Output is correct
58 Correct 355 ms 57168 KB Output is correct
59 Correct 378 ms 57304 KB Output is correct
60 Correct 327 ms 55040 KB Output is correct
61 Correct 627 ms 93160 KB Output is correct
62 Correct 653 ms 83232 KB Output is correct
63 Correct 688 ms 54488 KB Output is correct
64 Correct 645 ms 47684 KB Output is correct
65 Correct 614 ms 43092 KB Output is correct
66 Correct 548 ms 40956 KB Output is correct
67 Correct 631 ms 39688 KB Output is correct
68 Correct 579 ms 39260 KB Output is correct
69 Correct 534 ms 38988 KB Output is correct
70 Correct 584 ms 38860 KB Output is correct
71 Correct 566 ms 38888 KB Output is correct
72 Correct 554 ms 38648 KB Output is correct
73 Correct 599 ms 38744 KB Output is correct
74 Correct 595 ms 38796 KB Output is correct
75 Correct 590 ms 39120 KB Output is correct
76 Correct 492 ms 39116 KB Output is correct
77 Correct 370 ms 39460 KB Output is correct
78 Correct 245 ms 41176 KB Output is correct