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Cod sursa(job #97860)
#include <stdio.h>
#include <stdlib.h>
int stack[501];
int poz[501];
int begin, end;
void add(int& v, int& pozitie)
{
while(stack[end] >= v && begin < end)
{
--end;
}
if(stack[end] >= v)
{
stack[end] = v;
}
else
{
stack[++end] = v;
}
poz[end] = pozitie;
}
void print()
{
for(int i=begin;i<=end;++i)
printf("(%d / %d) ", stack[i], poz[i]);
printf("\n");
}
int main(void)
{
FILE* fin;
FILE* fout;
fin = fopen("secventa.in", "r");
fout = fopen("secventa.out", "w");
int n, k;
fscanf(fin, "%d %d\n", &n, &k);
int max = -30001;
int start = -1;
begin = 0;
end = 0;
stack[0] = 300001;
for(int i=0;i<n;++i)
{
int v;
fscanf(fin, "%d ", &v);
add(v, i);
if(i>=k-1)
{
while(i-poz[begin] > k-1)
++begin;
if(stack[begin] > max)
{
max = stack[begin];
start = i-(k-1);
}
}
}
fclose(fin);
fprintf(fout, "%d %d %d\n", start+1, start+1+k-1, max);
fclose(fout);
return 0;
}