Submission #115545

#	Time	Username	Problem	Language	Result	Execution time	Memory
115545		dndhk	Xylophone (JOI18_xylophone)	C++14	100 / 100	111 ms	512 KiB

xylophone

#include "xylophone.h"
#include <algorithm>
#include <iostream>

using namespace std;

int arr[5001];

int zero(int x){
	return (x>0)?x:-x;
}

void solve(int N) {
	arr[1] = 1;
	arr[2] = query(1, 2) + 1;
	int mn = 1;
	for(int i=3; i<=N; i++){
		int t = query(i-2, i);
		if(t==zero(arr[i-1]- arr[i-2])){
			int k = query(i-1, i);
			if(arr[i-1]>arr[i-2]){
				arr[i] = arr[i-1] - k;
			}else{
				arr[i]= arr[i-1] + k;
			}
		}else{
			int k = query(i-1, i);
			if(arr[i-1]>arr[i-2]){
				if(k==t){
					arr[i] = arr[i-1] - k;
				}else{
					arr[i] = arr[i-1] + k;
				}
			}else{
				if(k==t){
					arr[i] = arr[i-1] + k;
				}else{
					arr[i] = arr[i-1] - k;
				}
			}
		}
		mn = min(arr[i], mn);
	}
	//for(int i=1; i<=N; i++){
	//	cout<<i<<" "<<arr[i]<<endl;
	//}
	int idx1 = 1, idx2 = 1;
	for(int i=1; i<=N; i++){
		arr[i] = arr[i] - mn + 1;
		if(arr[i]>arr[idx1]){
			idx1 = i;
		}else if(arr[i]<arr[idx2]){
			idx2 = i;
		}
	}
	if(idx1<idx2){
		mn = arr[1];
		for(int i=1; i<=N; i++){
			arr[i] = arr[1]*2-arr[i];
			mn = min(arr[i], mn);
		}
		for(int i=1; i<=N; i++){
			arr[i] = arr[i] - mn + 1;
		}
	}
	//for(int i=1; i<=N; i++){
	//	cout<<i<<" "<<arr[i]<<endl;
	//}
	for(int i=1; i<=N; i++){
		answer(i, arr[i]);
	}

}

• Subtask 1: 11 / 11
• Subtask 2: 36 / 36
• Subtask 3: 53 / 53