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Cod sursa(job #27459)
#include<stdio.h>
#define NMAX 500010
#define INF 666666
#define PMAX 60666
int V[NMAX], D[NMAX], N, K, Max = -INF, PF;
int P[PMAX];
int buf[6*NMAX];
int main()
{
int i, st = 0, sf = 1, j, min;
FILE *fin = fopen("secventa.in", "r");
setbuffer(fin, buf, sizeof(buf));
fscanf(fin, "%d %d", &N, &K);
for (i = 1; i <= N; i++) fscanf(fin, "%d", V+i);
min = INF;
for (i = 0; i < NMAX; i++) D[i] = INF;
sf = 0;
for (i = 1; i <= K; i++)
{
while (sf > 0 && D[sf] > V[i]) sf--;
D[++sf] = V[i];
P[sf] = i;
}
Max = D[1]; PF = K;
st = 1;
for (i = K+1; i <= N; i++)
{
if (P[st] < i-K+1) st++;
while (sf >= st && D[sf] > V[i]) sf--;
D[++sf] = V[i];
P[sf] = i;
if (Max < D[st]) Max = D[st], PF = i;
}
freopen("secventa.out", "w", stdout);
printf("%d %d %d\n", PF-K+1, PF, Max);
return 0;
}