Cod sursa(job #3226072)

Utilizator Stormtrooper-007Vartic Rihard Stormtrooper-007 Data 19 aprilie 2024 21:21:55
Problema Range minimum query Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.07 kb
#include <bits/stdc++.h>

using namespace std;
const int NMAX=100000;
const int LOG=20;
int rmq[NMAX+5][LOG];
void initrmq(vector<int>v,int n)
{
    for(int i=0;i<n;i++)
    {
        rmq[i][0]=v[i];
    }
    for(int j=1;(1<<j)<=n;j++)
    {
        for(int i=0;(i+(1<<j)-1)<n;i++)
        {
            if(rmq[i][j-1]<rmq[i+(1<<j-1)][j-1])
            {
                rmq[i][j]=rmq[i][j-1];
            }
            else
            {
                rmq[i][j]=rmq[i+(1<<j-1)][j-1];
            }
        }
    }
}
int queryrmq(int l,int r)
{
    int len=r-l+1;
    int j=(int)log(len);
    if(rmq[l][j]<rmq[r-(1<<j)+1][j])
    {
        return rmq[l][j];
    }
    else
    {
        return rmq[r-(1<<j)+1][j];
    }
}
int main()
{
    ifstream cin("rmq.in");
    ofstream cout("rmq.out");
    int n,m;
    cin>>n>>m;
    vector<int>v(n);
    for(int i=0;i<n;i++)
    {
        cin>>v[i];
    }
    initrmq(v,n);
    while(m--)
    {
        int l,r;
        cin>>l>>r;
        cout<<queryrmq(l-1,r-1)<<'\n';
    }
    return 0;
}