oj.uz

Submission #850642

# Submission time Handle Problem Language Result Execution time Memory
850642 2023-09-17T08:18:48 Z Hyojin Swapping Cities (APIO20_swap) C++17
0 / 100
 29 ms 71504 KB 
#include <bits/stdc++.h>
using namespace std;
#define bit(n,i) ((n>>i)&1) 
#define all(a) (a).begin(),(a).end()
#define pb push_back
#define ep emplace_back
#define pii pair<int,int>
#define piii pair<int,pii> 
#define fi first
#define se second
#define ll long long
#define debug(x) cerr << #x << ' ' << x << '\n'
#define dbg(x) cerr<<#x<<' '<<x<<' '
const int base=31;
const int MOD=1e9+7;
const int N=3e5+5;
int ans[N],value[N],lab[N],deg[N],p[N][20],depth[N],n,m;
bool ok[N];
vector<int>adj[N];
int find_set(int v)
{
	return (lab[v]==v?v:lab[v]=find_set(lab[v]));
}
bool join(int u,int v,int w)
{
	value[n]=w;
	deg[u]++;
	deg[v]++;
	if (deg[u]>=3||deg[v]>=3) ok[n]=1;
	u=find_set(u);
	v=find_set(v);
	adj[n].pb(u);
	lab[u]=n;
	if (u!=v)
	{
		adj[n].pb(v);
		lab[v]=n;
	}
	ok[n]|=ok[u]|ok[v];
	++n;
}
int lca(int u,int v)
{
	if (depth[u]<depth[v]) swap(u,v);
	for (int i=18;~i;i--)
	{
		if (depth[u]-(1<<i)>=depth[v]) u=p[u][i];
	}
	if (u==v) return u;
	for (int i=18;~i;i--)
	{
		if (~p[u][i]&&p[u][i]!=p[v][i])
		{
			u=p[u][i];
			v=p[v][i];
		}
	}
	return p[u][0];
}
void dfs(int u,int par)
{
	if (ok[u]) ans[u]=value[u];
	else ans[u]=ans[par];
	for (int v:adj[u])
	{
		if (v==par) continue;
		depth[v]=depth[u]+1;
		p[v][0]=u;
		dfs(v,u);
	}
}
void init(int N,int M,vector<int>U,vector<int>V,vector<int>W)
{
	memset(p,-1,sizeof p);
	n=N,m=M;
	for (int i=0;i<n;i++) lab[i]=i;
	vector<int>id;
	for (int i=0;i<m;i++) id.pb(i);
	sort(all(id),[&](int x,int y){return W[x]<W[y];});
	for (auto idx:id)
	{
		join(U[idx],V[idx],W[idx]);
	}
	for (int i=0;i<n;i++) 
	{
		if (lab[i]!=i) continue;
		dfs(i,i);
	}
	for (int j=1;(1<<j)<n;j++)
	{
		for (int i=0;i<n;i++)
		{
			if (~p[i][j-1])
			{
				p[i][j]=p[p[i][j-1]][j-1];
			}
		}
	}
}
int getMinimumFuelCapacity(int x,int y)
{
	return ans[lca(x,y)];
}

Compilation message

swap.cpp: In function 'bool join(int, int, int)':
swap.cpp:41:1: warning: no return statement in function returning non-void [-Wreturn-type]
   41 | }
      | ^

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Runtime error 29 ms 71504 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Runtime error 29 ms 71504 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Runtime error 29 ms 71504 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 29 ms 71504 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Runtime error 29 ms 71504 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 29 ms 71504 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -