Cod sursa(job #1277968)

Utilizator ovidiuz98Zamfir Ovidiu ovidiuz98 Data 28 noiembrie 2014 13:01:00
Problema Range minimum query Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 0.77 kb
#include <fstream>
#define dim 400000
using namespace std;
ifstream fin("rmq.in");
ofstream fout("rmq.out");
int v[4*dim+2],n,i,x,y,minim,m;
void parc(int nod,int p,int u){
    if(p==u){
        fin>>v[nod];
        return;
    }
    int m=(p+u)/2;
    parc(2*nod,p,m);
    parc(2*nod+1,m+1,u);
    v[nod]=min(v[2*nod],v[2*nod+1]);
}
void query(int nod,int p,int u){
    if(p>=x && u<=y){
        minim=min(minim,v[nod]);
        return;
    }
    int m=(p+u)/2;
    if(m>=x)
        query(2*nod,p,m);
    if(m<y)
        query(2*nod+1,m+1,u);
}
int main(){
    fin>>n>>m;
    parc(1,1,n);
    for(i=1;i<=m;i++){
        fin>>x>>y;
        minim=dim;
        query(1,1,n);
        fout<<minim<<'\n';
    }
    fin.close();fout.close();
    return 0;
}