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답안 #525380

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
525380 2022-02-11T13:50:21 Z Koosha_mv Designated Cities (JOI19_designated_cities) C++14
0 / 100
 2000 ms 56480 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,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;
		Y=vec[2].S;
	}
	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){
	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^1];
		}
		else{
			h[v]=0;
		}
		dfs4(v,u);
	}
}
void find(){
	fill(ans,ans+N,inf);
	rt=1;
	dfs1(rt,0);
	dfs2(rt,0);
	rt=X;
	dfs3(rt,0);
	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:107:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  107 | main(){
      | ^~~~

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23756 KB Output is correct
2 Incorrect 16 ms 31692 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23824 KB Output is correct
2 Execution timed out 2070 ms 56480 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23792 KB Output is correct
2 Execution timed out 2080 ms 56164 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23756 KB Output is correct
2 Incorrect 16 ms 31692 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23824 KB Output is correct
2 Execution timed out 2070 ms 56480 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 23756 KB Output is correct
2 Incorrect 16 ms 31692 KB Output isn't correct
3 Halted 0 ms 0 KB -