Cod sursa(job #1618714)

Utilizator Algoritm98Bogdan Turlacu Algoritm98 Data 27 februarie 2016 22:53:25
Problema Arbori de intervale Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.13 kb
#include <iostream>
#include <stdio.h>
#define NMax 10002
using namespace std;
int v[NMax],N,M,x,y,op,Max,sol,I,J,xx,yy;
int Arb[4*NMax];

void BuildArb(int nod,int st,int dr)
{
    if(st==dr)
        {
            Arb[nod]=v[st];
        }
    else
    {
        int mij=(st+dr)/2;
        BuildArb(2*nod,st,mij);
        BuildArb(2*nod+1,mij+1,dr);
        Arb[nod]=max(Arb[2*nod],Arb[2*nod+1]);
    }
}

void Query(int nod,int st,int dr,int x,int y)
{
    if(st==dr)
    {
        if(Arb[nod]>=xx && Arb[nod]<=yy)
            sol++;
    }
    else
    {
        int mij=(st+dr)/2;
        if(x<=mij)
            Query(2*nod,st,mij,x,y);
        if(y>mij)
            Query(2*nod+1,mij+1,dr,x,y);
    }
}

void Solve()
{
    freopen("qxy.in","r",stdin);
    freopen("qxy.out","w",stdout);
    scanf("%d",&N);
    for(int i=1;i<=N;i++)
    {
        scanf("%d",&v[i]);
    }
    scanf("%d",&M);
    BuildArb(1,1,N);
    for(int i=1;i<=M;i++)
    {
        scanf("%d%d%d%d",&x,&y,&xx,&yy);
        sol=0;
        Query(1,1,N,x,y);
        printf("%d\n",sol);
    }
}

int main()
{
    Solve();
}