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Cod sursa(job #999976)
#include <stdio.h>
#define maxn 500010
int N, K;
int A[maxn], Deque[maxn];
int Front, Back;
int max, left, right;
int main()
{
freopen("secventa.in", "r", stdin);
freopen("secventa.out", "w", stdout);
int i;
scanf("%d %d ", &N, &K);
for (i = 1; i <= N; i++)
scanf("%d ", &A[i]);
Front = 1, Back = 0;
for (i = 1; i <= N; i++)
{
while (Front <= Back && A[i] <= A[ Deque[Back] ]) Back--;
Deque[++Back] = i;
if (Deque[Front] == i-K) Front++;
if (i >= K && A[Deque[Front]] > max ) {
max = A[Deque[Front]];
left = Deque[Front];
right = Deque[Back];
}
}
while ( A[--left] >= max ) ;
while ( A[--right] >= max && right-left >= K ) ;
printf("%d %d %d",left+1,right+1,max);
return 0;
}