Cod sursa(job #742104)

Utilizator visanrVisan Radu visanr Data 28 aprilie 2012 15:10:40
Problema Secventa Scor 70
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.65 kb
#include <cstdio>
#include <cstdlib>
using namespace std;


#define nmax 500010


int v[nmax], deque[nmax], n, k, max = -nmax, start, end, front, back;
char c;

int main()
{
    freopen("secventa.in","r",stdin);
    freopen("secventa.out","w",stdout);
    int i = 1, j;
    bool ok = false;
    scanf("%i %i", &n, &k);
    scanf("\n");
    int number = 0;
    while(c != '\n')
    {
                scanf("%c", &c);
                if(c == '\n') break;
                if(c == '-') ok = true;
                else
                {
                    if(c != ' ')
                    {
                         number = number * 10 + (c - '0');
                         
                    }else
                    {
                         if(ok == true) v[i++] = number * (-1);
                         else v[i++] = number;
                         ok = false;
                         number = 0;
                    }
                }
    }      
    v[i++] = number;         
    front = 1;
    back = 1;
    deque[1] = 1;
    for(i = 2; i < k; ++i)
    {
             while(front <= back && v[i] <= v[ deque[back] ]) back--;
             deque[++back] = i;
    }
    for(i = k; i<=n; ++i)
    {
             while(front <= back && v[i] <= v[ deque[back] ]) back--;
             deque[++back] = i;
             if(v[ deque[front] ] > max)
             {
                        max = v[ deque[front] ];
                        start = i - k + 1;
                        end = i;
             }
             if(deque[front] < i - k + 2) front++;
    }
    printf("%i %i %i", start, end, max);
    return 0;
}