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Cod sursa(job #431338)
#include <cstdio>
#include <cstdlib>
#include <ctime>
using namespace std;
int A[500000];
int d[500000];
int n,k,i,back,front;
int maxx = -40000;
int ii,jj;
void gen(int n)
{
freopen("secventa.in","w",stdout);
k = rand() % n;
printf("%d %d\n", n, k);
for (int i = 0; i < n; ++i)
printf("%d ", (rand() % 100000 - 30000));
fclose(stdout);
}
void get_brute()
{
int res = -1000000;
int resi, resj;
for (int i = 1; i <= n - k; ++i)
{
int min = 1000000;
int mini, minj;
for (int j = i; j <= i + k - 1; ++j)
{
if (A[j] < min)
{
mini = i;
minj = i + k - 1;
min = A[j];
}
}
if (min > res)
{
resi = mini;
resj = minj;
res = min;
}
}
printf("%d %d %d\n", resi, resj, res);
}
int main()
{
//srand(time(NULL));
//gen(100000);
freopen("secventa.in","r",stdin);
freopen("secventa.out","w",stdout);
scanf("%d %d", &n, &k);
for (i=1;i<=n;i++)
scanf("%d", &A[i]);
back = 1;
front = 1;
d[back] = 1;
for (i=2;i<=n;i++)
{
if ((d[front]) <= (i-k)) front++;
while ((front <= back) && (A[i] < A[d[back]]))
back--;
d[++back] = i;
if (i>=k)
if (A[d[front]] > maxx)
{
maxx = A[d[front]];
ii = i - k + 1;
jj = i ;
}
}
printf("%d %d %d\n", ii, jj, maxx);
//get_brute();
return 0;
}