Cod sursa(job #2753364)

Utilizator ATudorAAparaschivei Tudor Andrei ATudorA Data 22 mai 2021 16:38:29
Problema Range minimum query Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.78 kb
#include <fstream>
#include <algorithm>
using namespace std;
ifstream f("rmq.in");
ofstream g("rmq.out");
int r[103][100003];
int log[100003];
int main()
{
    int n,m,i,j,v=1,cl,x,y,k;
    long long val;
    f>>n>>m;
    for(i=1;i<=n;i++)
    {
        f>>r[0][i];
    }
    cl=n;
    i=0;
    while(v<=cl)
    {
        i++;
        for(j=1;j+v<=cl;j++)
        {
            r[i][j]=min(r[i-1][j],r[i-1][j+v]);
        }
        cl=cl-v;
        v=v*2;
    }
    log[1]=0;
    for(i=2;i<=n;i++)
    {
        log[i]=log[i/2]+1;
    }
    for(i=1;i<=m;i++)
    {
        f>>x>>y;
        k=log[y-x+1];
        val=1;
        for(j=1;j<=k;j++)
        {
            val=val*2;
        }
        g<<min(r[k][x],r[k][y-val+1])<<'\n';
    }
    return 0;
}