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Cod sursa(job #287506)
#include<cstdio>
using namespace std;
struct node
{
int val,poz;
node *next,*prev;
};
typedef struct node *lista;
void addnode(lista &first, lista &last, int x, int y)
{
node *p = new node;
p->val=x;
p->poz=y;
p->next=NULL;
if (!first)first=p;
if (last){last->next=p;p->prev=last;}
else p->prev = NULL;
last=p;
}
void deletestartnode(lista &first)
{
node *p;
p=first;
first=first->next;
delete p;
}
void deleteendnode(lista &last)
{
node *p;
p=last;
last=last->prev;
delete p;
}
int main()
{
FILE *f;
f=fopen("secventa.in","r");
long i,n,k,dr,st;
int c,max1;
dr=st=0;
fscanf(f,"%ld %ld",&n,&k);
lista first,last;
first=last=NULL;
for (i=1;i<k;i++)
{
fscanf(f,"%d ",&c);
while (last && last->val >= c)deleteendnode(last);
addnode(first,last,c,i);
}
max1=-30020;
for (i=k;i<=n;i++)
{
fscanf(f,"%d ",&c);
if (first->poz == i-k)deletestartnode(first);
while (last && last->val >= c)deleteendnode(last);
if (!last)first=NULL;
addnode(first,last,c,i);
if (max1 < first->val){max1=first->val; dr=i; st=i-k+1;}
}
fclose(f);
f = fopen("secventa.out","w");
fprintf(f,"%ld %ld %d\n",st,dr,max1);
fclose(f);
return 0;
}