Cod sursa(job #1982575)

Utilizator victoreVictor Popa victore Data 19 mai 2017 14:31:27
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.46 kb
#include<cstdio>

const int nmax=1e5+5;

int v[nmax],n;
inline void cautbin1(int nr)
{
    int st,dr,med;
    st=1;
    dr=n;
    while(st<=dr)
    {
        med=(st+dr)/2;
        if(v[med]>nr)
            dr=med-1;
        else
            st=med+1;
    }
    med=(st+dr)/2;
    if(v[med]==nr)
        printf("%d\n",med);
    else if(v[med-1]==nr)
        printf("%d\n",med-1);
    else
        printf("-1\n");
    return;
}
inline void cautbin2(int nr)
{
    int st,dr,med;
    st=1;
    dr=n;
    while(st<dr)
    {
        med=(st+dr)/2;
        if(v[med]>nr)
            dr=med;
        else
            st=med+1;
    }
    med=(st+dr)/2;
    if(v[med]>nr)
        med--;
    printf("%d\n",med);
    return;
}
inline void cautbin3(int nr)
{
    int st,dr,med;
    st=1;
    dr=n;
    while(st<dr)
    {
        med=(st+dr)/2;
        if(v[med]<nr)
            st=med+1;
        else
            dr=med;
    }
    med=(st+dr)/2;
    if(v[med]<nr)
        med++;
    printf("%d\n",med);
    return;
}
int main()
{
    freopen("cautbin.in","r",stdin);
    freopen("cautbin.out","w",stdout);
    int i,j,a,b,m,nr;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        scanf("%d",&v[i]);
    scanf("%d",&m);
    for(i=1;i<=m;i++)
    {
        scanf("%d%d",&a,&nr);
        if(a==0)
            cautbin1(nr);
        else if(a==1)
            cautbin2(nr);
        else if(a==2)
            cautbin3(nr);
    }
}