oj.uz

답안 #525400

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
525400 2022-02-11T14:12:28 Z Koosha_mv Designated Cities (JOI19_designated_cities) C++14
23 / 100
 2000 ms 56412 KB 
#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<(x.F)<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
#define int ll

const int N=1e6+99,inf=1e15;

int n,t,rt,X,Y,q,sum,mv,to[N],w[N],res[N],ans[N],pes[N],h[N],mark[N],par[N];
pair<int,int> dp[N];
vector<int> g[N];

void dfs1(int u,int p){
	for(auto id : g[u]){
		int v=to[id];
		if(v==p) continue ;
		res[rt]+=w[id];
		dfs1(v,u);
	}
}
void dfs2(int u,int p){
	vector<pair<int,int> > vec(3);
	for(auto id : g[u]){
		int v=to[id];
		if(v==p) continue ;
		res[v]=res[u]-w[id]+w[id^1];
		dfs2(v,u);
		dp[v].F+=w[id];
		vec[0]=dp[v];
		sort(all(vec));
	}
	if(vec[2].S==0){
		dp[u]={0,u};
	}
	else{
		dp[u]=vec[2];
	}
	pes[u]=inf;
	if(vec[1].S!=0 && res[u]-vec[1].F-vec[2].F<ans[2]){
		ans[2]=res[u]-vec[1].F-vec[2].F;
		X=vec[1].S;
		//if(!X) assert(0);
		Y=vec[2].S;
		mv=1;
	}
	minm(ans[1],res[u]);
}
void dfs3(int u,int p){
	par[u]=p;
	for(auto id : g[u]){
		int v=to[id];
		if(v==p) continue ;
		dfs3(v,u);
		sum+=w[id];
	}	
}
void dfs4(int u,int p){
	//cout<<u<<" "<<h[u]<<endl;
	if(h[u]>h[X]){
		X=u;
	}
	for(auto id : g[u]){
		int v=to[id];
		if(v==p) continue ;
		if(!mark[v]){
			h[v]=h[u]+w[id];
		}
		else{
			h[v]=0;
		}
		dfs4(v,u);
	}
}
void find(){
	fill(ans,ans+N,inf);
	rt=1;
	while(g[rt].size()==1) rt++;
	dfs1(rt,0);
	dfs2(rt,0);
	if(!mv) assert(0);
	rt=Y;
	dfs3(rt,0);
	//cout<<rt<<" "<<sum<<endl;
	f(i,2,n+1){
		X=rt;
		dfs4(rt,0);
		sum-=h[X];
		ans[i]=sum;
		while(X){
			mark[X]=1;
			X=par[X];
		}
	}
}

main(){
	ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
	cin>>n;
	f(i,1,n){
		int u,v;
		cin>>u>>v>>w[2*i]>>w[2*i+1];
		to[2*i]=v;
		to[2*i+1]=u;
		g[u].pb(2*i);
		g[v].pb(2*i+1);
	}
	if(n==2){
		ans[1]=min(w[2],w[3]);
		cin>>q;
		while(q--){
			int x;
			cin>>x;
			cout<<ans[x]<<'\n';
		}
		exit(0);
	}
	find();

	cin>>q;
	while(q--){
		int x;
		cin>>x;
		cout<<ans[x]<<'\n';
	}
}

Compilation message

designated_cities.cpp:113:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  113 | main(){
      | ^~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23756 KB Output is correct
2 Correct 18 ms 31664 KB Output is correct
3 Correct 17 ms 31596 KB Output is correct
4 Correct 16 ms 31688 KB Output is correct
5 Correct 16 ms 31668 KB Output is correct
6 Correct 17 ms 31564 KB Output is correct
7 Correct 16 ms 31568 KB Output is correct
8 Correct 16 ms 31564 KB Output is correct
9 Correct 16 ms 31692 KB Output is correct
10 Correct 17 ms 31600 KB Output is correct
11 Correct 16 ms 31564 KB Output is correct

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23804 KB Output is correct
2 Execution timed out 2073 ms 56412 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23756 KB Output is correct
2 Execution timed out 2100 ms 56200 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23756 KB Output is correct
2 Correct 18 ms 31664 KB Output is correct
3 Correct 17 ms 31596 KB Output is correct
4 Correct 16 ms 31688 KB Output is correct
5 Correct 16 ms 31668 KB Output is correct
6 Correct 17 ms 31564 KB Output is correct
7 Correct 16 ms 31568 KB Output is correct
8 Correct 16 ms 31564 KB Output is correct
9 Correct 16 ms 31692 KB Output is correct
10 Correct 17 ms 31600 KB Output is correct
11 Correct 16 ms 31564 KB Output is correct
12 Correct 13 ms 23756 KB Output is correct
13 Correct 96 ms 31948 KB Output is correct
14 Correct 111 ms 32104 KB Output is correct
15 Correct 96 ms 31940 KB Output is correct
16 Correct 97 ms 31940 KB Output is correct
17 Correct 103 ms 31940 KB Output is correct
18 Correct 99 ms 31940 KB Output is correct
19 Correct 98 ms 31936 KB Output is correct
20 Correct 101 ms 31924 KB Output is correct
21 Correct 98 ms 31948 KB Output is correct
22 Correct 100 ms 31940 KB Output is correct
23 Correct 87 ms 31936 KB Output is correct
24 Correct 60 ms 31928 KB Output is correct
25 Correct 112 ms 32292 KB Output is correct
26 Correct 58 ms 31948 KB Output is correct

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23804 KB Output is correct
2 Execution timed out 2073 ms 56412 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23756 KB Output is correct
2 Correct 18 ms 31664 KB Output is correct
3 Correct 17 ms 31596 KB Output is correct
4 Correct 16 ms 31688 KB Output is correct
5 Correct 16 ms 31668 KB Output is correct
6 Correct 17 ms 31564 KB Output is correct
7 Correct 16 ms 31568 KB Output is correct
8 Correct 16 ms 31564 KB Output is correct
9 Correct 16 ms 31692 KB Output is correct
10 Correct 17 ms 31600 KB Output is correct
11 Correct 16 ms 31564 KB Output is correct
12 Correct 13 ms 23804 KB Output is correct
13 Execution timed out 2073 ms 56412 KB Time limit exceeded
14 Halted 0 ms 0 KB -