Cod sursa(job #112635)

Utilizator mgntMarius B mgnt Data 6 decembrie 2007 12:29:39
Problema Secventa Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.08 kb
#include <cstdio>
#include <cstdlib>
#include <memory>
using namespace std;

int const minval = -30000;
int const maxval = +30000;
int const maxlen = 500000;
int a[maxlen];
struct {
  int val, pos;
} q[maxlen];
int c_c[maxval-minval+1];
int *c= &c_c[-minval];



int
main() {
  int i, j, n, k, pos, val, q1, q2;

  FILE * fin;
  fin=fopen("secventa.in","r");
  fscanf(fin, "%d %d", &n, &k);
  for(i=0;i<n;i++) fscanf(fin, "%d", &a[i]);
  fclose(fin);
  
  for(i=minval;i<=maxval;i++) c[i]=-1;
  for(i=0;i<k;i++) c[a[i]]=i;
  for(i=minval, j=0; i<=maxval; i++)
    if(-1!=c[i]) {
      q[j].val=i;
      q[j].pos=c[i];
      ++j;
    }
  
  pos=0;
  val=q[0].val;
  q1=0;
  q2=-1+j;
  for(i=k;i<n;i++) {

    while(q2 >= q1 && q[q2].val>a[i]) --q2;
    ++q2;
    q[q2].val=a[i];
    q[q2].pos=i;
    
	j=i-k;
    while(j>=q[q1].pos) ++q1;

    if(val<q[q1].val) {
      val=q[q1].val;
      pos=i-k+1;
    }
  }

  FILE * fout;
  fout=fopen("secventa.out", "w");
  fprintf (fout, "%d %d %d\n", 1+pos, pos+k, val);
  fclose(fout);
  return 0;
}