Submission #887632

#	Time	Username	Problem	Language	Result	Execution time	Memory
887632		amirhoseinfar1385	Xylophone (JOI18_xylophone)	C++17	100 / 100	58 ms	1272 KiB

xylophone

#include "xylophone.h"
#include<bits/stdc++.h>
using namespace std;
const int maxn=5000+10;
int dp2[maxn],dp3[maxn],n,val[maxn],vas[maxn],all[maxn];
void solve(int N) {
	n=N;
	//cout<<"wtf"<<n<<endl;
	for(int i=2;i<=n;i++){
		dp2[i]=query(i-1,i);
	}
	for(int i=3;i<=n;i++){
		dp3[i]=query(i-2,i);
	}
	val[2]=dp2[2];
	vas[2]=1;
	for(int i=3;i<=n;i++){
		if(dp3[i]==dp2[i-1]){
			vas[i]=-vas[i-1];
			val[i]=dp2[i];
			continue;
		}
		if(dp3[i]==dp2[i]){
			vas[i]=-vas[i-1];
			val[i]=dp2[i];
			continue;
		}
		vas[i]=vas[i-1];
		val[i]=dp2[i];
	}
	pair<int,int>mina,maxa;
	mina=make_pair(0,1);
	maxa=make_pair(0,1);
	for(int i=2;i<=n;i++){
		all[i]=all[i-1]+val[i]*vas[i];
		mina=min(mina,make_pair(all[i],i));
		maxa=max(maxa,make_pair(all[i],i));
	}
	if(mina.second>maxa.second){
		for(int i=2;i<=n;i++){
			vas[i]=-vas[i];
			all[i]=all[i-1]+val[i]*vas[i];
		}
	}
	int tof=0;
	for(int i=2;i<=n;i++){
		tof=min(tof,all[i]);
	}
	for(int i=1;i<=n;i++){
		all[i]+=-tof+1;
		//cout<<i<<" "<<all[i]<<" "<<tof<<endl;
		answer(i,all[i]);
	}
}

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