Submission #26840

#	Time	Username	Problem	Language	Result	Execution time	Memory
26840		yutaka1999	Editor (BOI15_edi)	C++14	100 / 100	309 ms	50336 KiB

edi

#include <cstdio>
#include <cstdlib>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <cstring>
#define SIZE 300005
#define BT 20

using namespace std;

int A[SIZE];
int par[SIZE][BT];
int mn[SIZE][BT];
int ans[SIZE];

int main()
{
	int n;
	scanf("%d",&n);
	memset(par,-1,sizeof(par));
	memset(mn,-1,sizeof(mn));
	for(int i=0;i<n;i++)
	{
		int a;
		scanf("%d",&a);
		if(a>0)
		{
			ans[i]=a;
			par[i][0]=i;
		}
		else
		{
			a=-a;
			int to=i-1;
			for(int j=BT-1;j>=0;j--)
			{
				if(mn[to][j]>=a)
				{
					to=par[to][j];
				}
			}
			to--;
			if(to==-1)
			{
				ans[i]=0;
				mn[i][0]=a;
			}
			else
			{
				ans[i]=ans[to];
				int now=to,c=a;
				for(int j=0;j<BT;j++)
				{
					par[i][j]=now;
					mn[i][j]=c;
					if(now!=-1)
					{
						c=min(c,mn[now][j]);
						now=par[now][j];
					}
				}
			}
		}
		printf("%d\n",ans[i]);
	}
	return 0;
}

Compilation message (stderr)

edi.cpp: In function 'int main()':
edi.cpp:20:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
edi.cpp:26:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a);
                 ^

• Subtask 1: 20 / 20
• Subtask 2: 15 / 15
• Subtask 3: 28 / 28
• Subtask 4: 37 / 37