Submission #898118

#	Time	Username	Problem	Language	Result	Execution time	Memory
898118		PersistentLife	Speedrun (RMI21_speedrun)	C++14	100 / 100	117 ms	1876 KiB

speedrun

#include "speedrun.h"
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pii pair<int,int>
#define pb push_back
vector <int> g[1005];
int dfn[1005],par[1005],clk;
void dfs0(int u,int fa)
{
	dfn[u]=++clk,par[u]=fa;
	for(int i=0;i<g[u].size();i++) if(g[u][i]!=fa) dfs0(g[u][i],u);
}
void assignHints(int subtask, int N, int A[], int B[])
{
	setHintLen(20);
//	return;
	for(int i=1;i<N;i++) g[A[i]].pb(B[i]),g[B[i]].pb(A[i]);
	dfs0(1,0);
	for(int i=1;i<=N;i++) 
	{
		for(int j=0;j<10;j++) setHint(i,j+1,((par[i]&(1<<j))?1:0));
		int nxt=0;
		for(int j=1;j<=N;j++) if(dfn[j]==dfn[i]+1) nxt=j; 
		for(int j=0;j<10;j++) setHint(i,j+11,((nxt&(1<<j))?1:0));
	}
}
int getpar()
{
	int res=0;
	for(int j=0;j<10;j++) if(getHint(j+1)) res+=(1<<j);
	return res;
}
int getnxt()
{
	int res=0;
	for(int j=0;j<10;j++) if(getHint(j+11)) res+=(1<<j);
	return res;
}
int vis[1005];
void speedrun(int subtask, int N, int start)
{
	int L=getLength();
	int u=start;
	vis[u]=1;
	int cnt=1;
	while(getpar()) u=getpar(),vis[u]=1,cnt++,goTo(u);
	int v=-1;
	while(cnt<N)
	{
		if(v==-1) v=getnxt();
//		cout<<u<<" "<<v<<"\n";
//		system("pause");
		if(goTo(v)) u=v,cnt+=(vis[u]^1),vis[u]=1,v=getnxt();
		else u=getpar(),goTo(u);
	}
}

Compilation message (stderr)

speedrun.cpp: In function 'void dfs0(int, int)':
speedrun.cpp:13:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for(int i=0;i<g[u].size();i++) if(g[u][i]!=fa) dfs0(g[u][i],u);
      |              ~^~~~~~~~~~~~
speedrun.cpp: In function 'void speedrun(int, int, int)':
speedrun.cpp:44:6: warning: unused variable 'L' [-Wunused-variable]
   44 |  int L=getLength();
      |      ^

• Subtask 1: 21 / 21
• Subtask 2: 8 / 8
• Subtask 3: 19 / 19
• Subtask 4: 12 / 12
• Subtask 5: 40 / 40