Submission #536863

#	Time	Username	Problem	Language	Result	Execution time	Memory
536863		jamezzz	Speedrun (RMI21_speedrun)	C++17	29 / 100	51 ms	980 KiB

speedrun

#include "speedrun.h"
#include <bits/stdc++.h>
using namespace std;

#define pf printf

void assignHints(int subtask, int N, int A[], int B[]) { /* your solution here */
	if(subtask==1){
		setHintLen(N);
		for(int i=1;i<N;++i){
			setHint(A[i],B[i],1);
			setHint(B[i],A[i],1);
		}
	}
	if(subtask==2){
		setHintLen(20);
		vector<int> cnt(N+1,0);
		for(int i=1;i<N;++i)++cnt[A[i]],++cnt[B[i]];
		int mx=1;
		for(int i=1;i<=N;++i)if(cnt[i]>cnt[mx])mx=i;
		for(int j=1;j<=20;++j){
			for(int i=1;i<=N;++i){
				if(mx&(1<<(j-1))){
					setHint(i,j,1);
				}
			}
		}
	}
}

void speedrun(int subtask, int N, int start) { /* your solution here */
	if(subtask==1){
		vector<int> cur(N+1,1),p(N+1,-1);
		int pos=start;
		while(true){
			while(cur[pos]!=N+1&&(getHint(cur[pos])==0||cur[pos]==p[pos]))++cur[pos];
			if(cur[pos]==N+1){
				if(p[pos]==-1)break;
				else goTo(p[pos]),pos=p[pos];
			}
			else{
				goTo(cur[pos]);
				p[cur[pos]]=pos;
				pos=cur[pos]++;
			}
		}
	}
	if(subtask==2){
		int cur=1,mid=0,pos=start;
		for(int i=1;i<=20;++i){
			if(getHint(i))mid+=1<<(i-1);
		}
		while(true){
			if(pos!=mid)goTo(mid),pos=mid;
			else{
				if(cur==N+1)break;
				if(cur==mid)++cur;
				goTo(cur);
				pos=cur++;
			}
		}
	}
}

• Subtask 1: 21 / 21
• Subtask 2: 8 / 8
• Subtask 3: 0 / 19
• Subtask 4: 0 / 12
• Subtask 5: 0 / 40