Submission #996256

#	Time	Username	Problem	Language	Result	Execution time	Memory
996256		Dzadzo	Designated Cities (JOI19_designated_cities)	C++17	0 / 100	2084 ms	26568 KiB

designated_cities

#include <bits/stdc++.h>
#define ll long long
#define int ll
#define pb push_back
#define S second
#define F first
#define pii pair<int,int>
#define vi vector <int>
#define vvi vector <vi>
#define vvvi vector <vvi>
#define vp vector <pii>
#define vvp vector <vp>
#define vb vector <bool>
#define vvb vector <vb>;
#define INF INT_MAX
#define MOD 1000000007
#define MAXN 200000
using namespace std;
pii val[MAXN+1];
int a[MAXN+1];
vector<vector<pair<int,pii>>> adj(MAXN+1);
int root;
void dfs(int v,int p){
	val[v]={0,v};
	for (auto X:adj[v]){
		int to=X.F;
		int x=X.S.F;
		int y=X.S.S;
		if (to==p)continue;
		dfs(to,v);
		val[v]=max(val[v],{val[to].F+x,val[to].S});
	}
	for (auto X:adj[v]){
		int to=X.F;
		int x=X.S.F;
		int y=X.S.S;
		if (to==p)continue;
		if (val[to].S!=val[v].S || v==root)a[val[to].S]=val[to].F+x;
	}	
}
int calc(int v,int p){
	int res=0;
	for (auto X:adj[v]){
		int to=X.F;
		int x=X.S.F;
		int y=X.S.S;
		if (to==p)continue;
		res+=calc(to,v)+y;
	}
	return res;
}
signed main(){	
	ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
	int n;
	cin>>n;
	int cost=0;
	for (int i=1;i<n;i++){
		int u,v;
		cin>>u>>v;
		int x,y;
		cin>>x>>y;
		adj[u].pb({v,{x,y}});
		adj[v].pb({u,{y,x}});
		cost+=y+x;
	}
	
	int q;
	cin>>q;
	int e[q+1];
	for (int i=1;i<=n;i++)cin>>e[i];
	vi ans(q+1);
	for (root=1;root<=n;root++){
		int up=calc(root,0);
		dfs(root,0);
		vi V={INF};
	    for (int i=1;i<=n;i++)V.pb(a[i]);
		sort(V.begin(),V.end());
		reverse(V.begin(),V.end());
		vi p(n+1);
		for (int i=1;i<=n;i++)p[i]=p[i-1]+V[i];
		for (int i=1;i<=q;i++){
			ans[i]=max(ans[i],up+p[e[i]-1]);
		}
	}
	for (int i=1;i<=q;i++)cout<<cost-ans[i]<<"\n";
}

Compilation message (stderr)

designated_cities.cpp: In function 'void dfs(long long int, long long int)':
designated_cities.cpp:28:7: warning: unused variable 'y' [-Wunused-variable]
   28 |   int y=X.S.S;
      |       ^
designated_cities.cpp:36:7: warning: unused variable 'y' [-Wunused-variable]
   36 |   int y=X.S.S;
      |       ^
designated_cities.cpp: In function 'long long int calc(long long int, long long int)':
designated_cities.cpp:45:7: warning: unused variable 'x' [-Wunused-variable]
   45 |   int x=X.S.F;
      |       ^

• Subtask 1: 0 / 6
• Subtask 2: 0 / 7
• Subtask 3: 0 / 9
• Subtask 4: 0 / 17
• Subtask 5: 0 / 17
• Subtask 6: 0 / 44