Submission #510224

#	Time	Username	Problem	Language	Result	Execution time	Memory
510224		nichke	Xylophone (JOI18_xylophone)	C++14	0 / 100	0 ms	200 KiB

xylophone

#include <bits/stdc++.h>
using namespace std;
int query(int l,int r);
void answer(int a,int b);
void solve(int n){
	if(n==2){
		answer(1,1);
		answer(1,2);
		return;
	}
	int diff[n+1][3];
	for(int i=2;i<=n;i++)diff[i-1][0]=query(i-1,i);
	for(int i=3;i<=n;i++)diff[i-2][1]=query(i-2,i);
	diff[1][2]=1;
	for(int i=1;i+2<=n;i++){
		if(diff[i][1]==diff[i][0]+diff[i+1][0])diff[i+1][2]=diff[i][2];
		else diff[i+1][2]=diff[i][2]^1;
	}
	int res[n+1];
	res[1]=0;
	for(int i=1;i+1<=n;i++)res[i+1]=res[i]+(-1+2*diff[i][2])*diff[i][0];
	int mn=1,mx=1;
	for(int i=2;i<=n;i++){
		if(res[i]<res[mn])mn=i;
		if(res[i]>res[mx])mx=i;
	}
	if(mn>mx)for(int i=1;i+1<=n;i++)diff[i][2]^=1;
	res[1]=0;
	for(int i=1;i+1<=n;i++)res[i+1]=res[i]+(-1+2*diff[i][2])*diff[i][0];
	mn=1;
	for(int i=1;i<=n;i++)mn=min(mn,res[i]);
	for(int i=1;i<=n;i++)res[i]+=1-mn,answer(i,res[i]);
}

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