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Cod sursa(job #368741)
#include<stdio.h>
#define INF 1<<30
int d[500100],v[500100],n,k,i,bi,bf,p,u,max;
int main(){
FILE*f=fopen("secventa.in","r");
FILE*g=fopen("secventa.out","w");
fscanf(f,"%d %d\n",&n,&k);
for(i=1;i<=n;i++)
fscanf(f,"%d",&v[i]);
p=1;u=0;max= -INF;
for(i=1;i<=n;i++){
while(p<=u && v[i]<=v[d[u]])
u--;
d[++u]=i;
if(d[p]==i-k)
p++;
if(i>=k)
if(v[d[p]]>max){
max=v[d[p]];
bi=d[u]-k+1;
bf=d[u];
}
}
fprintf(g,"%d %d %d",bi,bf,max);
fclose(f);fclose(g);
return 0;
}