Submission #1056058

#	Time	Username	Problem	Language	Result	Execution time	Memory
1056058		tamir1	Xylophone (JOI18_xylophone)	C++17	0 / 100	1 ms	344 KiB

xylophone

#include<bits/stdc++.h>
#include "xylophone.h"
using namespace std;
static int A[5001];
int x[5001],y[5001],i,mn,ok[5001];
void solve(int N) {
	A[1]=1;
	for(i=2;i<=N;i++) x[i]=query(i-1,i);
	for(i=3;i<=N;i++) y[i]=query(i-2,i);
	A[2]=x[2]+1;
	for(i=3;i<=N;i++){
		if(x[i-1]==y[i]){
			if(A[i-1]>A[i-2]) A[i]=A[i-1]-x[i];
			else A[i]=A[i-1]+x[i];
		}
		else{
			if(y[i]!=x[i]){
				if(A[i-1]>A[i-2]) A[i]=A[i-1]+x[i];
				else A[i]=A[i-1]-x[i];
			}
			else{
				if(A[i-2]>A[i-1]) A[i]=A[i-1]+x[i];
				else A[i]=A[i-1]-x[i];
			}
		}
	}
	mn=10000;
	for(i=1;i<=N;i++){
		mn=min(A[i],mn);
	}
	mn=1-mn;
	for(i=1;i<=N;i++) A[i]+=mn;
	bool unen=1;
	for(i=1;i<=N;i++){
		if(A[i]<1 || A[i]>N) unen=0;
		if(ok[A[i]]!=0) unen=0;
		ok[A[i]]=i;
	}
	if(ok[1]>ok[N]) unen=0;
	if(unen){
		for(i=1;i<=N;i++) answer(i,A[i]);
		return;
	}
	A[1]=1;
	A[2]=x[2]-1;
	for(i=3;i<=N;i++){
		if(x[i-1]==y[i]){
			if(A[i-1]>A[i-2]) A[i]=A[i-1]-x[i];
			else A[i]=A[i-1]+x[i];
		}
		else{
			if(y[i]!=x[i]){
				if(A[i-1]>A[i-2]) A[i]=A[i-1]+x[i];
				else A[i]=A[i-1]-x[i];
			}
			else{
				if(A[i-2]>A[i-1]) A[i]=A[i-1]+x[i];
				else A[i]=A[i-1]-x[i];
			}
		}
	}
	mn=10000;
	for(i=1;i<=N;i++){
		mn=min(A[i],mn);
	}
	mn=1-mn;
	for(i=1;i<=N;i++) A[i]+=mn;
	for(i=1;i<=N;i++) answer(i,A[i]);
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 36
• Subtask 3: 0 / 53