Cod sursa(job #1747136)

Utilizator tziplea_stefanTiplea Stefan tziplea_stefan Data 24 august 2016 15:56:01
Problema Range minimum query Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 1.09 kb
#include <fstream>
#define VAL 100005
#define INTR 200005

using namespace std;

ifstream fin("rmq.in");
ofstream fout("rmq.out");

int N, M, i, j;
int op, a, b;
int v[VAL], minim;
int aib[INTR];

void initializare(int nod, int st, int dr)
{
    if (st==dr)
      aib[nod]=v[st];
    else
    {
        int mij=(st+dr) / 2;
        initializare(2*nod, st, mij);
        initializare(2*nod+1, mij+1, dr);
        aib[nod]=min(aib[2*nod], aib[2*nod+1]);
    }
}

void interogare(int nod, int st, int dr, int a, int b)
{
    if (a<=st && dr<=b)
      minim=min(minim, aib[nod]);
    else
    {
        int mij=(st+dr) / 2;
        if (a<=mij)
          interogare(2*nod, st, mij, a, b);
        if (mij+1<=b)
          interogare(2*nod+1, mij+1, dr, a, b);
    }
}

int main()
{
    fin >> N >> M;
    for (i=1; i<=N; i++)
      fin >> v[i];
    initializare(1, 1, N);
    for (i=1; i<=M; i++)
    {
        fin >> a >> b;
        minim=VAL;
        interogare(1, 1, N, a, b);
        fout << minim << '\n';
    }
    fin.close();
    fout.close();
    return 0;
}