oj.uz

답안 #519841

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
519841 2022-01-27T11:41:22 Z new_acc 수도 (JOI20_capital_city) C++14
100 / 100
 2993 ms 399504 KB 
#include<bits/stdc++.h>
#define fi first
#define se second
#define rep(a, b) for(int a = 0; a < (b); a++)
using namespace std;
typedef long long ll;
typedef vector<ll> vi;
typedef vector<ll> vl;
const int N=2e5+10;
const int L=17;
const int M=4e6+5e5;
vi graf[N],r[N],graf2[M];
int t[N],gl[N],spojna[M],ile[M],pre[N],post[M],kon[M];
pair<int,int> jump[N][L+1];
int l=0,l2=0,n,k;
bitset<M>kan;
bitset<M>vis;
void add(int a,int b){
	graf2[a].push_back(b);
}
void dfs(int v,int o,int g){
	pre[v]=++l2;
	gl[v]=g;
	jump[v][0]={o,++l};
	add(l,t[o-1]);
	for(int j=1;j<=L;j++) jump[v][j].fi=jump[jump[v][j-1].fi][j-1].fi,jump[v][j].se=++l,add(l,jump[v][j-1].se),add(l,jump[jump[v][j-1].fi][j-1].se);
	for(auto u:graf[v]){
		if(u==o) continue;
		dfs(u,v,g+1);
	}
}
int lca(int a,int b){
	if(gl[a]<gl[b]) swap(a,b);
	for(int i=L;i>=0;i--) if(gl[jump[a][i].fi]>=gl[b]) a=jump[a][i].fi;
	if(a==b) return a;
	int res=0;
	for(int i=L;i>=0;i--){
		if(jump[a][i].fi==jump[b][i].fi) res=jump[a][i].fi;
		else a=jump[a][i].fi,b=jump[b][i].fi;
	}
	return res;
}
void dod(int a,int l,int x){
	for(int i=L;i>=0;i--) if(gl[jump[a][i].fi]>=gl[l]) add(x,jump[a][i].se),a=jump[a][i].fi;
}
void dfs2(int v){
	if(vis[v]) return;
	vis[v]=1;
	for(auto u:graf2[v]) dfs2(u);
	post[l2++]=v;
}
void dfs3(int v,int s){
	vis[v]=1;
	spojna[v]=s;
	if(v<=k-1) ile[s]++;
	for(auto u:graf2[v])
	{
		if(!vis[u]) dfs3(u,s);
		else if(spojna[u]!=s) kan[spojna[u]]=1;
	}
}
void odw(){
	rep(i,l+1) kon[i]=graf2[i].size();
	rep(i,l+1) {
		for(int j=kon[i]-1;j>=0;j--) graf2[graf2[i][j]].push_back(i),swap(graf2[i][j],graf2[i][graf2[i].size()-1]),graf2[i].pop_back();
		graf2[i].shrink_to_fit();
	}
}
void solve(){
	cin>>n>>k;
	rep(i,n-1){
		int a,b;
		cin>>a>>b;
		graf[a].push_back(b),graf[b].push_back(a);
	}
	l=k-1;
	rep(i,n){
		cin>>t[i];
		t[i]--;
		r[t[i]].push_back(i+1);
	}
	dfs(1,1,1);
	vector<pair<int,int> >vv;
	rep(i,k){	
		vv.clear();
		for(auto u:r[i]) vv.push_back({pre[u],u});
		sort(vv.begin(),vv.end());
		for(int j=1;j<vv.size();j++){
			int l=lca(vv[j].se,vv[j-1].se);
			dod(vv[j].se,l,i),dod(vv[j-1].se,l,i);
		}
	}
	l2=0;
	rep(i,l+1) dfs2(i);
	rep(i,l+1) vis[i]=0;
	odw();
	int curr=0;
	for(int i=l;i>=0;i--) if(!vis[post[i]]) dfs3(post[i],++curr);
	int res=INT_MAX;
	rep(i,k) if(!kan[spojna[i]]) res=min(res,ile[spojna[i]]);
	cout<<res-1<<"\n";
}
int main(){
	ios_base::sync_with_stdio(0),cin.tie(0);
	solve();
}

Compilation message

capital_city.cpp: In function 'void solve()':
capital_city.cpp:88:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |   for(int j=1;j<vv.size();j++){
      |               ~^~~~~~~~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 53 ms 115380 KB Output is correct
2 Correct 55 ms 115380 KB Output is correct
3 Correct 54 ms 115408 KB Output is correct
4 Correct 56 ms 115436 KB Output is correct
5 Correct 56 ms 115396 KB Output is correct
6 Correct 59 ms 115384 KB Output is correct
7 Correct 60 ms 115440 KB Output is correct
8 Correct 54 ms 115336 KB Output is correct
9 Correct 53 ms 115348 KB Output is correct
10 Correct 54 ms 115380 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 53 ms 115380 KB Output is correct
2 Correct 55 ms 115380 KB Output is correct
3 Correct 54 ms 115408 KB Output is correct
4 Correct 56 ms 115436 KB Output is correct
5 Correct 56 ms 115396 KB Output is correct
6 Correct 59 ms 115384 KB Output is correct
7 Correct 60 ms 115440 KB Output is correct
8 Correct 54 ms 115336 KB Output is correct
9 Correct 53 ms 115348 KB Output is correct
10 Correct 54 ms 115380 KB Output is correct
11 Correct 63 ms 118140 KB Output is correct
12 Correct 63 ms 118212 KB Output is correct
13 Correct 77 ms 118084 KB Output is correct
14 Correct 76 ms 118204 KB Output is correct
15 Correct 62 ms 117884 KB Output is correct
16 Correct 63 ms 117828 KB Output is correct
17 Correct 62 ms 117960 KB Output is correct
18 Correct 69 ms 117760 KB Output is correct
19 Correct 61 ms 117956 KB Output is correct
20 Correct 68 ms 117804 KB Output is correct
21 Correct 62 ms 117776 KB Output is correct
22 Correct 62 ms 117988 KB Output is correct
23 Correct 78 ms 118952 KB Output is correct
24 Correct 64 ms 117748 KB Output is correct
25 Correct 64 ms 117744 KB Output is correct
26 Correct 60 ms 117712 KB Output is correct
27 Correct 91 ms 117856 KB Output is correct
28 Correct 75 ms 117856 KB Output is correct
29 Correct 66 ms 117828 KB Output is correct
30 Correct 74 ms 117860 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2993 ms 384052 KB Output is correct
2 Correct 2277 ms 375864 KB Output is correct
3 Correct 2589 ms 378216 KB Output is correct
4 Correct 2319 ms 375880 KB Output is correct
5 Correct 2740 ms 389292 KB Output is correct
6 Correct 2230 ms 375640 KB Output is correct
7 Correct 2524 ms 377256 KB Output is correct
8 Correct 1983 ms 370084 KB Output is correct
9 Correct 1911 ms 341092 KB Output is correct
10 Correct 1826 ms 337724 KB Output is correct
11 Correct 2001 ms 341504 KB Output is correct
12 Correct 1921 ms 344776 KB Output is correct
13 Correct 1986 ms 338148 KB Output is correct
14 Correct 1914 ms 344536 KB Output is correct
15 Correct 2005 ms 346092 KB Output is correct
16 Correct 1926 ms 339176 KB Output is correct
17 Correct 2077 ms 340084 KB Output is correct
18 Correct 1911 ms 340464 KB Output is correct
19 Correct 2005 ms 345368 KB Output is correct
20 Correct 1915 ms 344292 KB Output is correct
21 Correct 58 ms 115396 KB Output is correct

Subtask #4
59.0 / 59.0

# 결과 실행 시간 메모리 Grader output
1 Correct 53 ms 115380 KB Output is correct
2 Correct 55 ms 115380 KB Output is correct
3 Correct 54 ms 115408 KB Output is correct
4 Correct 56 ms 115436 KB Output is correct
5 Correct 56 ms 115396 KB Output is correct
6 Correct 59 ms 115384 KB Output is correct
7 Correct 60 ms 115440 KB Output is correct
8 Correct 54 ms 115336 KB Output is correct
9 Correct 53 ms 115348 KB Output is correct
10 Correct 54 ms 115380 KB Output is correct
11 Correct 63 ms 118140 KB Output is correct
12 Correct 63 ms 118212 KB Output is correct
13 Correct 77 ms 118084 KB Output is correct
14 Correct 76 ms 118204 KB Output is correct
15 Correct 62 ms 117884 KB Output is correct
16 Correct 63 ms 117828 KB Output is correct
17 Correct 62 ms 117960 KB Output is correct
18 Correct 69 ms 117760 KB Output is correct
19 Correct 61 ms 117956 KB Output is correct
20 Correct 68 ms 117804 KB Output is correct
21 Correct 62 ms 117776 KB Output is correct
22 Correct 62 ms 117988 KB Output is correct
23 Correct 78 ms 118952 KB Output is correct
24 Correct 64 ms 117748 KB Output is correct
25 Correct 64 ms 117744 KB Output is correct
26 Correct 60 ms 117712 KB Output is correct
27 Correct 91 ms 117856 KB Output is correct
28 Correct 75 ms 117856 KB Output is correct
29 Correct 66 ms 117828 KB Output is correct
30 Correct 74 ms 117860 KB Output is correct
31 Correct 2993 ms 384052 KB Output is correct
32 Correct 2277 ms 375864 KB Output is correct
33 Correct 2589 ms 378216 KB Output is correct
34 Correct 2319 ms 375880 KB Output is correct
35 Correct 2740 ms 389292 KB Output is correct
36 Correct 2230 ms 375640 KB Output is correct
37 Correct 2524 ms 377256 KB Output is correct
38 Correct 1983 ms 370084 KB Output is correct
39 Correct 1911 ms 341092 KB Output is correct
40 Correct 1826 ms 337724 KB Output is correct
41 Correct 2001 ms 341504 KB Output is correct
42 Correct 1921 ms 344776 KB Output is correct
43 Correct 1986 ms 338148 KB Output is correct
44 Correct 1914 ms 344536 KB Output is correct
45 Correct 2005 ms 346092 KB Output is correct
46 Correct 1926 ms 339176 KB Output is correct
47 Correct 2077 ms 340084 KB Output is correct
48 Correct 1911 ms 340464 KB Output is correct
49 Correct 2005 ms 345368 KB Output is correct
50 Correct 1915 ms 344292 KB Output is correct
51 Correct 58 ms 115396 KB Output is correct
52 Correct 1655 ms 399504 KB Output is correct
53 Correct 1543 ms 374240 KB Output is correct
54 Correct 1543 ms 374904 KB Output is correct
55 Correct 1508 ms 376960 KB Output is correct
56 Correct 1532 ms 384864 KB Output is correct
57 Correct 1555 ms 370344 KB Output is correct
58 Correct 1944 ms 359636 KB Output is correct
59 Correct 1914 ms 360280 KB Output is correct
60 Correct 2131 ms 375408 KB Output is correct
61 Correct 2080 ms 370240 KB Output is correct
62 Correct 2205 ms 376168 KB Output is correct
63 Correct 2201 ms 376100 KB Output is correct
64 Correct 2127 ms 371380 KB Output is correct
65 Correct 2205 ms 375412 KB Output is correct
66 Correct 1373 ms 354648 KB Output is correct
67 Correct 1456 ms 370828 KB Output is correct
68 Correct 1410 ms 354572 KB Output is correct
69 Correct 1350 ms 353012 KB Output is correct
70 Correct 1511 ms 352512 KB Output is correct
71 Correct 1361 ms 354700 KB Output is correct
72 Correct 1323 ms 354560 KB Output is correct
73 Correct 1364 ms 370936 KB Output is correct
74 Correct 1414 ms 354384 KB Output is correct
75 Correct 1411 ms 352760 KB Output is correct
76 Correct 1755 ms 354816 KB Output is correct
77 Correct 1600 ms 350580 KB Output is correct
78 Correct 1972 ms 340544 KB Output is correct
79 Correct 1968 ms 337648 KB Output is correct
80 Correct 1908 ms 343960 KB Output is correct
81 Correct 1933 ms 340960 KB Output is correct
82 Correct 2163 ms 342284 KB Output is correct
83 Correct 1927 ms 338040 KB Output is correct
84 Correct 2119 ms 346492 KB Output is correct
85 Correct 1962 ms 342704 KB Output is correct
86 Correct 1944 ms 337388 KB Output is correct
87 Correct 1949 ms 339008 KB Output is correct
88 Correct 2337 ms 355452 KB Output is correct
89 Correct 2285 ms 349260 KB Output is correct
90 Correct 2214 ms 347844 KB Output is correct
91 Correct 2282 ms 351320 KB Output is correct
92 Correct 2370 ms 352136 KB Output is correct
93 Correct 2384 ms 349844 KB Output is correct
94 Correct 2259 ms 348880 KB Output is correct
95 Correct 2329 ms 350920 KB Output is correct
96 Correct 2328 ms 351556 KB Output is correct
97 Correct 2369 ms 351740 KB Output is correct