oj.uz

답안 #525395

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
525395 2022-02-11T14:09:41 Z Koosha_mv Designated Cities (JOI19_designated_cities) C++14
16 / 100
 342 ms 80220 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 13 ms 23828 KB Output is correct
2 Incorrect 17 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 23812 KB Output is correct
2 Correct 266 ms 51396 KB Output is correct
3 Correct 314 ms 75864 KB Output is correct
4 Correct 227 ms 51588 KB Output is correct
5 Correct 252 ms 51392 KB Output is correct
6 Correct 261 ms 54920 KB Output is correct
7 Correct 230 ms 51536 KB Output is correct
8 Correct 332 ms 76672 KB Output is correct
9 Correct 154 ms 52004 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 17 ms 23812 KB Output is correct
2 Correct 257 ms 51460 KB Output is correct
3 Correct 342 ms 80220 KB Output is correct
4 Correct 235 ms 51484 KB Output is correct
5 Correct 256 ms 51360 KB Output is correct
6 Correct 273 ms 55504 KB Output is correct
7 Correct 170 ms 51764 KB Output is correct
8 Correct 323 ms 67256 KB Output is correct
9 Correct 145 ms 51956 KB Output is correct

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Incorrect 17 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 23812 KB Output is correct
2 Correct 266 ms 51396 KB Output is correct
3 Correct 314 ms 75864 KB Output is correct
4 Correct 227 ms 51588 KB Output is correct
5 Correct 252 ms 51392 KB Output is correct
6 Correct 261 ms 54920 KB Output is correct
7 Correct 230 ms 51536 KB Output is correct
8 Correct 332 ms 76672 KB Output is correct
9 Correct 154 ms 52004 KB Output is correct
10 Correct 17 ms 23812 KB Output is correct
11 Correct 257 ms 51460 KB Output is correct
12 Correct 342 ms 80220 KB Output is correct
13 Correct 235 ms 51484 KB Output is correct
14 Correct 256 ms 51360 KB Output is correct
15 Correct 273 ms 55504 KB Output is correct
16 Correct 170 ms 51764 KB Output is correct
17 Correct 323 ms 67256 KB Output is correct
18 Correct 145 ms 51956 KB Output is correct
19 Correct 13 ms 23756 KB Output is correct
20 Incorrect 276 ms 51432 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23828 KB Output is correct
2 Incorrect 17 ms 31660 KB Output isn't correct
3 Halted 0 ms 0 KB -