Cod sursa(job #1986567)

Utilizator giotoPopescu Ioan gioto Data 28 mai 2017 16:33:35
Problema Secventa Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 1 kb
#include <cstdio>
#include <cstring>
using namespace std;

int p, n, k, dq[500002], a[500002];
char s[10000005];
inline int getpars(){
    int x = 0, ok = 0;
    if(s[p] == '-') ++p, ok = 1;
    while(s[p] >= '0' && s[p] <= '9')
        x = x * 10 + s[p++] - '0';
    ++p;
    if(ok == 1) x = -x;
    return x;
}
int main()
{
    freopen("secventa.in", "r", stdin);
    freopen("secventa.out", "w", stdout);
    scanf("%d%d\n", &n, &k);
    fgets(s, sizeof(s), stdin);
    int Front = 1, Back = 0, st, dr, Sol = -2000000, Last = 1;
    for(int i = 1; i <= n ; ++i){
        a[i] = getpars();
        while(Front <= Back && a[i] <= a[dq[Back]])
            --Back;
        dq[++Back] = i;
        while(Front < Back && i - dq[Front] >= k) Last = dq[Front++] + 1;
        if(i - Last + 1 >= k){
            if(a[dq[Front]] > Sol){
                Sol = a[dq[Front]];
                st = Last; dr = i;
            }
        }
    }
    printf("%d %d %d", st, dr, Sol);
    return 0;
}