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답안 #131899

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
131899 2019-07-18T01:37:43 Z dndhk 족보 (KOI18_family) C++14
100 / 100
 1129 ms 102844 KB 
#include <bits/stdc++.h>

#define pb push_back
#define all(v) ((v).begin(), (v).end())
#define sortv(v) sort(all(v))
#define sz(v) ((int)(v).size())
#define uniqv(v) (v).erase(unique(all(v)), (v).end())
#define umax(a, b) (a)=max((a), (b))
#define umin(a, b) (a)=min((a), (b))
#define FOR(i,a,b) for(int i = (a); i <= (b); i++)
#define rep(i,n) FOR(i,1,n)
#define rep0(i,n) FOR(i,0,(int)(n)-1)
#define FI first
#define SE second
#define INF 2000000000
#define INFLL 1000000000000000000LL


using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAX_N = 300000;
const int MAX_K = 20;

int K;
struct Tree{
	int N, r;
	int p[MAX_N+1];
	bool vst[MAX_N+1];
	vector<int> gp[MAX_N+1];
	int lv[MAX_N+1], par[MAX_N+1][MAX_K+1], in[MAX_N+1], out[MAX_N+1], cnt = 0;
	void dfs(int x){
		if(p[x]==0)	cnt = 0;
		in[x] = ++cnt;	vst[x] = true; lv[x] = (p[x]==0 ? 1 : lv[p[x]]+1);
		par[x][0] = p[x];
		for(int i=1; i<=MAX_K; i++)	par[x][i] = par[par[x][i-1]][i-1];
		for(int i=0; i<gp[x].size(); i++){
			if(gp[x][i]==p[x])	continue;
			p[gp[x][i]] = x;
			dfs(gp[x][i]);
		}
		out[x] = cnt;
	}
	int lca(int x, int y){
		for(int i=MAX_K; i>=0; i--){
			if(lv[par[x][i]]>=lv[y])	x = par[x][i];
			if(lv[par[y][i]]>=lv[x])	y = par[y][i];
		}
		for(int i=MAX_K; i>=0; i--){
			if(par[x][i]!=par[y][i]){
				x = par[x][i]; y = par[y][i];
			}
		}
		if(x!=y)	x = par[x][0];
		return x;
	}
};
Tree T[2];

vector<pii> vt;
vector<pii> upd;
int g[MAX_N+1], l[MAX_N+1], r[MAX_N+1], mlv[MAX_N+1];

void init(int x){
	for(int i=0; i<x; i++){
		g[i] = l[i] = r[i] = i;
		mlv[i] = INF;
	}
}

int find_g(int x){
	return (x==g[x]) ? x : g[x] = find_g(g[x]);
}

void union_g(int x, int y){
	x = find_g(x); y = find_g(y);
	if(x>y)	{int tmp = x; x = y; y = tmp;}
	g[y] = x;
	r[x] = r[y];
	mlv[x] = min(mlv[x], mlv[y]);
}

bool in[MAX_N+1];

int main(){
	scanf("%d%d%d", &T[0].N, &T[1].N, &K);
	for(int i=0; i<2; i++){
		for(int j=1; j<=T[i].N; j++){
			scanf("%d", &T[i].p[j]);
			if(T[i].p[j]==0)	T[i].r = j;
			else if(i==0)	T[i].gp[T[i].p[j]].pb(j);
		}
		if(i==0)	T[i].dfs(T[i].r);
	}
	for(int i=1; i<=K; i++)		vt.pb({T[0].in[i], i});
	sort(vt.begin(), vt.end());
	for(int i=0; i<K; i++){
		int n = vt[i].second;
		//cout<<n<<" ";
		while(1){
			if(in[n])	break;
			in[n] = true;
			if(T[1].p[n]==0)	break;
			T[1].gp[T[1].p[n]].pb(n);
			n = T[1].p[n];
		}
	}
	T[1].dfs(T[1].r);
	while(!vt.empty())	vt.pop_back();
	for(int i=1; i<=K; i++)		vt.pb({T[1].in[i], i});
	for(int i=1; i<=T[0].N; i++){
		T[0].gp[i].clear();
		in[i] = false;
	}
	sort(vt.begin(), vt.end());
	//cout<<endl;
	for(int i=0; i<K; i++){
		int n = vt[i].second;
		//cout<<n<<" ";
		while(1){
			if(in[n])	break;
			in[n] = true;
			if(T[0].p[n]==0)	break;
			T[0].gp[T[0].p[n]].pb(n);
			n = T[0].p[n];
		}
	}
	T[0].dfs(T[0].r);
	/*cout<<endl;
	for(int i=1; i<=K; i++){
		cout<<T[0].in[i]<<" ";
	}
	cout<<endl;
	for(int i=0; i<K; i++){
		cout<<vt[i].second<<" ";
	}*/
	for(int i=0; i<K-1; i++){
		if(T[0].in[vt[i].second] > T[0].in[vt[i+1].second]){
			printf("NO"); return 0;
		}if(T[1].in[vt[i].second] > T[1].in[vt[i+1].second]){
			printf("NO"); return 0;
		}
	}

	for(int i=0; i<vt.size()-1; i++){
		int n1 = vt[i].second, n2 = vt[i+1].second;
		upd.pb({-T[0].lv[T[0].lca(n1, n2)], i});
	}
	sort(upd.begin(), upd.end());
	init(K);
	int i1, i2, n1, n2, g1, g2, l1, l2, l3, l4, l5, l6;
	for(int i=0; i<upd.size(); i++){
		i1 = upd[i].second; i2 = upd[i].second+1;
		n1 = vt[i1].second; n2 = vt[i2].second;
		g1 = find_g(i1); g2 = find_g(i2);
		l1 = min(T[1].lv[T[1].lca(n1, n2)], min(mlv[g1], mlv[g2]));
		l2 = (g1==0) ? 0 : T[1].lv[T[1].lca(vt[g1-1].second, vt[g1].second)];
		l3 = (r[g2]==K-1) ? 0 : T[1].lv[T[1].lca(vt[r[g2]].second, vt[r[g2]+1].second)];
		l4 = T[0].lv[T[0].lca(n1, n2)];
		l5 = (g1==0) ? INF : T[0].lv[T[0].lca(vt[g1-1].second, vt[g1].second)];
		l6 = (r[g2]==K-1) ? INF : T[0].lv[T[0].lca(vt[r[g2]].second, vt[r[g2]+1].second)];
		//cout<<n1<<" "<<n2<<endl;
		//cout<<l1<<" "<<l2<<" "<<l3<<" "<<l4<<" "<<l5<<" "<<l6<<endl;
		if((l3>l1 && l4!=l6) || (l2>l1 && l4!=l5)){
			printf("NO");
			return 0;
		}
		mlv[find_g(i1)] = min(mlv[find_g(i1)], l1);
		union_g(i1, i2);
	}
	printf("YES");
	return 0;
}

Compilation message

family.cpp: In member function 'void Tree::dfs(int)':
family.cpp:39:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0; i<gp[x].size(); i++){
                ~^~~~~~~~~~~~~
family.cpp: In function 'int main()':
family.cpp:147:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<vt.size()-1; i++){
               ~^~~~~~~~~~~~
family.cpp:154:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<upd.size(); i++){
               ~^~~~~~~~~~~
family.cpp:88:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &T[0].N, &T[1].N, &K);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
family.cpp:91:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &T[i].p[j]);
    ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 14456 KB Output is correct
2 Correct 15 ms 14456 KB Output is correct
3 Correct 15 ms 14456 KB Output is correct
4 Correct 14 ms 14456 KB Output is correct
5 Correct 14 ms 14456 KB Output is correct
6 Correct 14 ms 14456 KB Output is correct
7 Correct 14 ms 14456 KB Output is correct
8 Correct 14 ms 14456 KB Output is correct
9 Correct 15 ms 14540 KB Output is correct
10 Correct 14 ms 14456 KB Output is correct
11 Correct 15 ms 14528 KB Output is correct
12 Correct 15 ms 14456 KB Output is correct
13 Correct 14 ms 14456 KB Output is correct
14 Correct 15 ms 14584 KB Output is correct
15 Correct 14 ms 14584 KB Output is correct
16 Correct 14 ms 14584 KB Output is correct
17 Correct 15 ms 14548 KB Output is correct
18 Correct 14 ms 14584 KB Output is correct
19 Correct 15 ms 14584 KB Output is correct
20 Correct 15 ms 14584 KB Output is correct
21 Correct 14 ms 14584 KB Output is correct
22 Correct 14 ms 14588 KB Output is correct
23 Correct 14 ms 14584 KB Output is correct
24 Correct 15 ms 14624 KB Output is correct
25 Correct 14 ms 14456 KB Output is correct
26 Correct 15 ms 14456 KB Output is correct
27 Correct 17 ms 14548 KB Output is correct
28 Correct 17 ms 14456 KB Output is correct
29 Correct 14 ms 14456 KB Output is correct
30 Correct 15 ms 14456 KB Output is correct

Subtask #2
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 14456 KB Output is correct
2 Correct 15 ms 14456 KB Output is correct
3 Correct 15 ms 14456 KB Output is correct
4 Correct 14 ms 14456 KB Output is correct
5 Correct 14 ms 14456 KB Output is correct
6 Correct 14 ms 14456 KB Output is correct
7 Correct 14 ms 14456 KB Output is correct
8 Correct 14 ms 14456 KB Output is correct
9 Correct 15 ms 14540 KB Output is correct
10 Correct 14 ms 14456 KB Output is correct
11 Correct 15 ms 14528 KB Output is correct
12 Correct 15 ms 14456 KB Output is correct
13 Correct 14 ms 14456 KB Output is correct
14 Correct 15 ms 14584 KB Output is correct
15 Correct 14 ms 14584 KB Output is correct
16 Correct 14 ms 14584 KB Output is correct
17 Correct 15 ms 14548 KB Output is correct
18 Correct 14 ms 14584 KB Output is correct
19 Correct 15 ms 14584 KB Output is correct
20 Correct 15 ms 14584 KB Output is correct
21 Correct 14 ms 14584 KB Output is correct
22 Correct 14 ms 14588 KB Output is correct
23 Correct 14 ms 14584 KB Output is correct
24 Correct 15 ms 14624 KB Output is correct
25 Correct 14 ms 14456 KB Output is correct
26 Correct 15 ms 14456 KB Output is correct
27 Correct 17 ms 14548 KB Output is correct
28 Correct 17 ms 14456 KB Output is correct
29 Correct 14 ms 14456 KB Output is correct
30 Correct 15 ms 14456 KB Output is correct
31 Correct 14 ms 14556 KB Output is correct
32 Correct 18 ms 14536 KB Output is correct
33 Correct 18 ms 14456 KB Output is correct
34 Correct 14 ms 14456 KB Output is correct
35 Correct 14 ms 14456 KB Output is correct
36 Correct 16 ms 14616 KB Output is correct
37 Correct 15 ms 14480 KB Output is correct
38 Correct 15 ms 14584 KB Output is correct
39 Correct 15 ms 14572 KB Output is correct
40 Correct 14 ms 14584 KB Output is correct
41 Correct 14 ms 14456 KB Output is correct
42 Correct 17 ms 14448 KB Output is correct
43 Correct 15 ms 14428 KB Output is correct
44 Correct 15 ms 14436 KB Output is correct
45 Correct 15 ms 14456 KB Output is correct
46 Correct 14 ms 14556 KB Output is correct
47 Correct 15 ms 14556 KB Output is correct
48 Correct 15 ms 14584 KB Output is correct
49 Correct 15 ms 14556 KB Output is correct
50 Correct 15 ms 14584 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 14456 KB Output is correct
2 Correct 15 ms 14456 KB Output is correct
3 Correct 15 ms 14456 KB Output is correct
4 Correct 14 ms 14456 KB Output is correct
5 Correct 14 ms 14456 KB Output is correct
6 Correct 14 ms 14456 KB Output is correct
7 Correct 14 ms 14456 KB Output is correct
8 Correct 14 ms 14456 KB Output is correct
9 Correct 15 ms 14540 KB Output is correct
10 Correct 14 ms 14456 KB Output is correct
11 Correct 15 ms 14528 KB Output is correct
12 Correct 15 ms 14456 KB Output is correct
13 Correct 14 ms 14456 KB Output is correct
14 Correct 15 ms 14584 KB Output is correct
15 Correct 14 ms 14584 KB Output is correct
16 Correct 14 ms 14584 KB Output is correct
17 Correct 15 ms 14548 KB Output is correct
18 Correct 14 ms 14584 KB Output is correct
19 Correct 15 ms 14584 KB Output is correct
20 Correct 15 ms 14584 KB Output is correct
21 Correct 14 ms 14584 KB Output is correct
22 Correct 14 ms 14588 KB Output is correct
23 Correct 14 ms 14584 KB Output is correct
24 Correct 15 ms 14624 KB Output is correct
25 Correct 14 ms 14456 KB Output is correct
26 Correct 15 ms 14456 KB Output is correct
27 Correct 17 ms 14548 KB Output is correct
28 Correct 17 ms 14456 KB Output is correct
29 Correct 14 ms 14456 KB Output is correct
30 Correct 15 ms 14456 KB Output is correct
31 Correct 14 ms 14556 KB Output is correct
32 Correct 18 ms 14536 KB Output is correct
33 Correct 18 ms 14456 KB Output is correct
34 Correct 14 ms 14456 KB Output is correct
35 Correct 14 ms 14456 KB Output is correct
36 Correct 16 ms 14616 KB Output is correct
37 Correct 15 ms 14480 KB Output is correct
38 Correct 15 ms 14584 KB Output is correct
39 Correct 15 ms 14572 KB Output is correct
40 Correct 14 ms 14584 KB Output is correct
41 Correct 14 ms 14456 KB Output is correct
42 Correct 17 ms 14448 KB Output is correct
43 Correct 15 ms 14428 KB Output is correct
44 Correct 15 ms 14436 KB Output is correct
45 Correct 15 ms 14456 KB Output is correct
46 Correct 14 ms 14556 KB Output is correct
47 Correct 15 ms 14556 KB Output is correct
48 Correct 15 ms 14584 KB Output is correct
49 Correct 15 ms 14556 KB Output is correct
50 Correct 15 ms 14584 KB Output is correct
51 Correct 30 ms 15876 KB Output is correct
52 Correct 29 ms 15832 KB Output is correct
53 Correct 26 ms 15736 KB Output is correct
54 Correct 24 ms 15480 KB Output is correct
55 Correct 31 ms 15848 KB Output is correct
56 Correct 30 ms 15836 KB Output is correct
57 Correct 28 ms 15644 KB Output is correct
58 Correct 27 ms 15612 KB Output is correct
59 Correct 30 ms 15864 KB Output is correct
60 Correct 29 ms 15736 KB Output is correct
61 Correct 27 ms 15864 KB Output is correct
62 Correct 20 ms 15736 KB Output is correct
63 Correct 26 ms 15864 KB Output is correct
64 Correct 18 ms 15132 KB Output is correct
65 Correct 15 ms 14568 KB Output is correct
66 Correct 20 ms 15664 KB Output is correct
67 Correct 20 ms 15584 KB Output is correct
68 Correct 18 ms 15408 KB Output is correct
69 Correct 21 ms 15624 KB Output is correct
70 Correct 18 ms 15484 KB Output is correct

Subtask #4
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 14456 KB Output is correct
2 Correct 15 ms 14456 KB Output is correct
3 Correct 15 ms 14456 KB Output is correct
4 Correct 14 ms 14456 KB Output is correct
5 Correct 14 ms 14456 KB Output is correct
6 Correct 14 ms 14456 KB Output is correct
7 Correct 14 ms 14456 KB Output is correct
8 Correct 14 ms 14456 KB Output is correct
9 Correct 15 ms 14540 KB Output is correct
10 Correct 14 ms 14456 KB Output is correct
11 Correct 15 ms 14528 KB Output is correct
12 Correct 15 ms 14456 KB Output is correct
13 Correct 14 ms 14456 KB Output is correct
14 Correct 15 ms 14584 KB Output is correct
15 Correct 14 ms 14584 KB Output is correct
16 Correct 14 ms 14584 KB Output is correct
17 Correct 15 ms 14548 KB Output is correct
18 Correct 14 ms 14584 KB Output is correct
19 Correct 15 ms 14584 KB Output is correct
20 Correct 15 ms 14584 KB Output is correct
21 Correct 14 ms 14584 KB Output is correct
22 Correct 14 ms 14588 KB Output is correct
23 Correct 14 ms 14584 KB Output is correct
24 Correct 15 ms 14624 KB Output is correct
25 Correct 14 ms 14456 KB Output is correct
26 Correct 15 ms 14456 KB Output is correct
27 Correct 17 ms 14548 KB Output is correct
28 Correct 17 ms 14456 KB Output is correct
29 Correct 14 ms 14456 KB Output is correct
30 Correct 15 ms 14456 KB Output is correct
31 Correct 14 ms 14556 KB Output is correct
32 Correct 18 ms 14536 KB Output is correct
33 Correct 18 ms 14456 KB Output is correct
34 Correct 14 ms 14456 KB Output is correct
35 Correct 14 ms 14456 KB Output is correct
36 Correct 16 ms 14616 KB Output is correct
37 Correct 15 ms 14480 KB Output is correct
38 Correct 15 ms 14584 KB Output is correct
39 Correct 15 ms 14572 KB Output is correct
40 Correct 14 ms 14584 KB Output is correct
41 Correct 14 ms 14456 KB Output is correct
42 Correct 17 ms 14448 KB Output is correct
43 Correct 15 ms 14428 KB Output is correct
44 Correct 15 ms 14436 KB Output is correct
45 Correct 15 ms 14456 KB Output is correct
46 Correct 14 ms 14556 KB Output is correct
47 Correct 15 ms 14556 KB Output is correct
48 Correct 15 ms 14584 KB Output is correct
49 Correct 15 ms 14556 KB Output is correct
50 Correct 15 ms 14584 KB Output is correct
51 Correct 30 ms 15876 KB Output is correct
52 Correct 29 ms 15832 KB Output is correct
53 Correct 26 ms 15736 KB Output is correct
54 Correct 24 ms 15480 KB Output is correct
55 Correct 31 ms 15848 KB Output is correct
56 Correct 30 ms 15836 KB Output is correct
57 Correct 28 ms 15644 KB Output is correct
58 Correct 27 ms 15612 KB Output is correct
59 Correct 30 ms 15864 KB Output is correct
60 Correct 29 ms 15736 KB Output is correct
61 Correct 27 ms 15864 KB Output is correct
62 Correct 20 ms 15736 KB Output is correct
63 Correct 26 ms 15864 KB Output is correct
64 Correct 18 ms 15132 KB Output is correct
65 Correct 15 ms 14568 KB Output is correct
66 Correct 20 ms 15664 KB Output is correct
67 Correct 20 ms 15584 KB Output is correct
68 Correct 18 ms 15408 KB Output is correct
69 Correct 21 ms 15624 KB Output is correct
70 Correct 18 ms 15484 KB Output is correct
71 Correct 116 ms 26636 KB Output is correct
72 Correct 159 ms 27424 KB Output is correct
73 Correct 51 ms 22136 KB Output is correct
74 Correct 98 ms 28844 KB Output is correct
75 Correct 90 ms 28648 KB Output is correct
76 Correct 847 ms 102844 KB Output is correct
77 Correct 817 ms 97144 KB Output is correct
78 Correct 1129 ms 84340 KB Output is correct
79 Correct 640 ms 87228 KB Output is correct
80 Correct 692 ms 89256 KB Output is correct
81 Correct 77 ms 26192 KB Output is correct
82 Correct 86 ms 26556 KB Output is correct
83 Correct 46 ms 22076 KB Output is correct
84 Correct 93 ms 28664 KB Output is correct
85 Correct 94 ms 28540 KB Output is correct
86 Correct 835 ms 93948 KB Output is correct
87 Correct 898 ms 97572 KB Output is correct
88 Correct 489 ms 79400 KB Output is correct
89 Correct 642 ms 86736 KB Output is correct
90 Correct 694 ms 89252 KB Output is correct