Cod sursa(job #351647)
Utilizator | Data | 28 septembrie 2009 20:09:07 | |
---|---|---|---|
Problema | Deque | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.48 kb |
#include<fstream>
#define MaxN 5000010
using namespace std;
fstream f("deque.in",ios::in),g("deque.out",ios::out);
int A[MaxN],Deque[MaxN],N,K,Back,Front;
long long Sum;
int main()
{
int i;
f>>N>>K;
for(i=1;i<=N;i++)f>>A[i];
f.close();
Back=0;
Front=1;
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)Sum+=A[Deque[Front]];
}
g<<Sum;
g.close();
return 0;
}