Cod sursa(job #1834102)

Utilizator caprassCapras aServiciilor Secrete caprass Data 23 decembrie 2016 21:17:59
Problema Range minimum query Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 1.2 kb
#include <stdio.h>
#include <vector>
 
using namespace std;
 
#define NMAX 100002
#define INF 0x3f3f3f3f
 
long int aint[NMAX*3];
long int n,m,mx;
 
void update(long int nod, long int st, long int dr, long int poz, long int val)
{
if (st==dr) aint[nod]=val;
    else
    {
        long int mid=(st+dr)/2;
 
        if (poz<=mid) update(nod*2,st,mid,poz,val);
            else update(nod*2+1,mid+1,dr,poz,val);
        aint[nod]=min(aint[nod*2],aint[nod*2+1]);
    }
 
}
 
void query(long int nod, long int st, long int dr, long int a, long int b)
{
    if (a<=st&&dr<=b) mx=min(mx,aint[nod]);
        else
        {
            long int mid=(st+dr)/2;
 
            if (a<=mid) query(nod*2,st,mid,a,b);
            if (b>mid) query(nod*2+1,mid+1,dr,a,b);
        }
}
 
int main()
{
    freopen("rmq.in","r",stdin);
    freopen("rmq.out","w",stdout);
 
    long int i,x,y,k;
 
    scanf("%ld %ld",&n,&m);
 
    for (i=1;i<=n;i++)
        {
            scanf("%ld",&x);
            update(1,1,n,i,x);
        }
 
    for (i=1;i<=m;i++)
        {
            scanf("%ld %ld",&x,&y);
             
            mx=INF;
            query(1,1,n,x,y);
            printf("%ld\n",mx);
                 
        }
    return 0;       
}