Cod sursa(job #3142548)

Utilizator Simon2712Simon Slanina Simon2712 Data 22 iulie 2023 14:07:19
Problema Range minimum query Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.61 kb
#include <fstream>

using namespace std;
ifstream fin("rmq.in");
ofstream fout("rmq.out");
const int N=1e5;
int rmq[17][N+11],logog[N+11];
int query(int x,int y)
{
    int l=logog[y-x+1];
    return min(rmq[l][y],rmq[l][x+(1<<l)-1]);
}
int main()
{
    int n,m,i,j,x,y;
    fin>>n>>m;
    for(i=2;i<=N;i++)
        logog[i]=logog[i/2]+1;
    for(i=1;i<=n;i++)
        fin>>rmq[0][i];
    for(j=1;(1<<j)<=n;j++)
    for(i=(1<<j);i<=n;i++)
        rmq[j][i]=min(rmq[j-1][i],rmq[j-1][i-(1<<(j-1))]);
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        fout<<query(x,y)<<'\n';
    }
    return 0;
}