Cod sursa(job #2171025)

Utilizator mariaghinescu22Ghinescu Maria mariaghinescu22 Data 15 martie 2018 10:53:38
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.02 kb
#include <fstream>

using namespace std;

const int L=16, N=100001;

int v[N], n;
ifstream in("cautbin.in");
ofstream out("cautbin.out");

int caut0(int x){
   int r=0, pas=1<<L;
   while(pas!=0){
        if(r+pas<=n && v[r+pas]<=x){
            r+=pas;
        }
        pas/=2;
   }
   if(r==0 || v[r]<x){
        r=-1;
   }
   return r;
}

int caut1(int x){
    int r=0, pas=1<<L;
    while(pas!=0){
        if(r+pas<=n && v[r+pas]<=x){
            r+=pas;
        }
        pas/=2;
   }
   return r;
}

int caut2(int x){
    int r=0, pas=1<<L;
    while(pas!=0){
        if(r+pas<=n && !(v[r+pas]>=x)){
            r+=pas;
        }
        pas/=2;
    }
    r++;
    return r;
}

int main(){
    int m, x, a;
    in>>n;
    for(int i=1; i<=n; i++){
        in>>v[i];
    }
    in>>m;
    for(int i=1; i<=m; i++){
        in>>a>>x;
        if(a==0){
            out<<caut0(x)<<"\n";
        }
        if(a==1){
            out<<caut1(x)<<"\n";
        }
        if(a==2){
            out<<caut2(x)<<"\n";
        }
    }
    return 0;
}