oj.uz

답안 #525397

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
525397 2022-02-11T14:10:13 Z Koosha_mv Designated Cities (JOI19_designated_cities) C++14
16 / 100
 376 ms 80116 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;
	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:112:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  112 | main(){
      | ^~~~

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 23756 KB Output is correct
2 Incorrect 19 ms 31660 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23756 KB Output is correct
2 Correct 262 ms 51452 KB Output is correct
3 Correct 376 ms 75840 KB Output is correct
4 Correct 262 ms 51504 KB Output is correct
5 Correct 250 ms 51408 KB Output is correct
6 Correct 342 ms 54920 KB Output is correct
7 Correct 214 ms 51448 KB Output is correct
8 Correct 363 ms 76680 KB Output is correct
9 Correct 165 ms 51968 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 23756 KB Output is correct
2 Correct 308 ms 51508 KB Output is correct
3 Correct 352 ms 80116 KB Output is correct
4 Correct 248 ms 51448 KB Output is correct
5 Correct 335 ms 51464 KB Output is correct
6 Correct 275 ms 55496 KB Output is correct
7 Correct 180 ms 51844 KB Output is correct
8 Correct 320 ms 67164 KB Output is correct
9 Correct 141 ms 51904 KB Output is correct

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 23756 KB Output is correct
2 Incorrect 19 ms 31660 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23756 KB Output is correct
2 Correct 262 ms 51452 KB Output is correct
3 Correct 376 ms 75840 KB Output is correct
4 Correct 262 ms 51504 KB Output is correct
5 Correct 250 ms 51408 KB Output is correct
6 Correct 342 ms 54920 KB Output is correct
7 Correct 214 ms 51448 KB Output is correct
8 Correct 363 ms 76680 KB Output is correct
9 Correct 165 ms 51968 KB Output is correct
10 Correct 15 ms 23756 KB Output is correct
11 Correct 308 ms 51508 KB Output is correct
12 Correct 352 ms 80116 KB Output is correct
13 Correct 248 ms 51448 KB Output is correct
14 Correct 335 ms 51464 KB Output is correct
15 Correct 275 ms 55496 KB Output is correct
16 Correct 180 ms 51844 KB Output is correct
17 Correct 320 ms 67164 KB Output is correct
18 Correct 141 ms 51904 KB Output is correct
19 Correct 13 ms 23756 KB Output is correct
20 Incorrect 305 ms 51608 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 23756 KB Output is correct
2 Incorrect 19 ms 31660 KB Output isn't correct
3 Halted 0 ms 0 KB -