Cod sursa(job #2341698)

Utilizator aturcsaTurcsa Alexandru aturcsa Data 12 februarie 2019 09:50:43
Problema Range minimum query Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.71 kb
#include <cmath>
#include <fstream>
using namespace std;
ifstream fin("rmq.in");
ofstream fout("rmq.out");
int T[100001][20];
int n,q;
int main()
{
    fin>>n>>q;
    for(int i=1;i<=n;i++)
        fin>>T[i][0];
    for(int j=1;(1<<j)<=n;j++)
    {
        for(int i=1;i+(1<<j)-1<=n;i++)
            if(T[i][j-1]<T[i+(1<<j)][j-1])
                T[i][j]=T[i][j-1];
            else
                T[i][j]=T[i+(1<<j)][j-1];
    }
    for(int i=1;i<=q;i++)
    {
        int a,b;
        fin>>a>>b;
        int dif=b-a+1;
        int d=log2(dif);
        if(T[a][d]<= T[b-(1<<d)+1][d])
            fout<<T[a][d]<<"\n";
        else
            fout<<T[b-(1<<d)+1][d]<<"\n";
    }
    return 0;
}