Cod sursa(job #334456)

Utilizator bent_larsenSturzu Antonio-Gabriel bent_larsen Data 26 iulie 2009 20:28:14
Problema Secventa Scor 90
Compilator c Status done
Runda Arhiva de probleme Marime 0.71 kb
#include<stdio.h>
#include<stdlib.h>

int main()
{
	int coada[500001],i,n,k,x[500000],tail,head,max=-30001,pozmax=0;
	char *buffer;
	FILE *f=fopen("secventa.in","r");

	buffer=(char *) calloc(2500000,sizeof(char));
	setbuf(f,buffer);

	fscanf(f,"%i%i",&n,&k);
	for(i=0;i<n;i++)
		fscanf(f,"%i",x+i);
	fclose(f);

	tail=1;
	head=0;
	
	for(i=0;i<n;i++)
	{
		while(tail<=head && x[i]<=x[coada[head]])
			head--;
		coada[++head]=i;

		if(i-k==coada[tail])
			tail++;
		if(i+1>=k)
		{
			if(x[coada[tail]]>max)
			{
				max=x[coada[tail]];
				pozmax=i;
			}
		}
	}
	f=fopen("secventa.out","w");
	fprintf(f,"%i %i %i\n",pozmax+2-k,pozmax+1,max);
	fclose(f);
	free(buffer);
	return 0;
}