Cod sursa(job #3232555)

Utilizator Floroiu_MariusFloroiu Marius Cristian Floroiu_Marius Data 30 mai 2024 21:27:56
Problema Range minimum query Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.91 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin("rmq.in");
ofstream fout("rmq.out");
vector <int> v(100003),a(4*100003);
void build(int nod,int st,int dr)
{
    if (st==dr)
    {
        a[nod]=v[st];
    }
    else
    {
        int mij=((st+dr)>>1);
        build(2*nod,st,mij);
        build(2*nod+1,mij+1,dr);
        a[nod]=min(a[2*nod],a[2*nod+1]);
    }
}
int query(int nod,int fiu1,int fiu2,int st,int dr)
{
    if (st>fiu2 || dr<fiu1)
        return 1e9+1;
    if (st<=fiu1 && dr>=fiu2)
        return a[nod];
    else
    {
        int mij=((fiu1+fiu2)>>1);
        return min(query(2*nod,fiu1,mij,st,dr),query(2*nod+1,mij+1,fiu2,st,dr));
    }
}
int n,m,x,y;
int main()
{
    fin>>n>>m;
    for (int i=0;i<n;i++)
        fin>>v[i];
    build(1,0,n-1);
    while (m--)
    {
        fin>>x>>y;
        fout<<query(1,0,n-1,x-1,y-1)<<'\n';
    }
    return 0;
}