Mai intai trebuie sa te autentifici.
Cod sursa(job #203934)
Utilizator | Data | 20 august 2008 21:41:50 | |
---|---|---|---|
Problema | Cautare binara | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.88 kb |
#include <stdio.h>
int N,v[100005];
int q0(int x)
{
int s,d,m,i;
for (s=1; d=N; s<=d)
{
m=s+(d-s)/2;
if (v[m]>x)
d=m-1;
if (v[m]<x)
s=m+1;
if (v[m]==x)
return m;
}
return -1;
}
int q1(int x)
{
int s,d,m,i,k;
for (s=1; d=N; s<=d)
{
m=s+(d-s)/2;
if (v[m]>=x)
{
k=v[m];
d=m+1;
}
else s=m-1;
}
return k;
}
int q2(int x)
{
int s,d,m,i,k;
for (s=1; d=N; s<=d)
{
m=s+(d-s)/2;
if (v[m]<=x)
{
k=v[m];
d=m+1;
}
else s=m-1;
}
return k;
}
int main()
{
int n,i,p,x,t;
freopen("cautbin.in","r",stdin);
freopen("cautbin.out","w",stdout);
scanf("%d",&n);
for (i=1; i<=n; i++)
scanf("%d",&v[i]);
scanf("%d",&p);
for (i=1; i<=p; i++)
{
scanf("%d%d",&t,&x);
if (t==0)
printf("%d\n",q0(x));
if (t==1)
printf("%d\n",q1(x));
if (t==2)
printf("%d\n",q2(x));
}
}