Cod sursa(job #886630)

Utilizator Impaler_009Mihai Nitu Impaler_009 Data 23 februarie 2013 01:40:48
Problema Range minimum query Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.75 kb
#include <fstream>
#include <math.h>
using namespace std;
ifstream fin("rmq.in");
ofstream fout("rmq.out");

int a[1010],v[100001],n;

int main()
{
    int x,y,m,i,s,min,j,k,h;
    fin>>n>>m;
    s=sqrt(n);
    for (i=1;i<=n;i++) fin>>v[i];
    for (i=1;i<=s+2;i++)
    {
        min=100001;
        k=(i-1)*s+1; h=i*s;
        for (j=k;j<=h&&j<=n;j++) if (v[j]<min) min=v[j];
        a[i]=min;
    }
    for (i=1;i<=m;i++)
    {
        fin>>x>>y;
        j=x/s+1; k=y/s;
        min=100001;
        for (h=j;h<=k;h++)
        if (a[h]<min) min=a[h];
        j=(j-1)*s+1; k=k*s;
        for (h=x;h<j;h++)
        if (v[h]<min) min=v[h];
        for (h=k+1;h<=y;h++)
        if (v[h]<min) min=v[h];
        fout<<min<<"\n";
    }
}