Cod sursa(job #850122)
Utilizator | Data | 7 ianuarie 2013 23:42:34 | |
---|---|---|---|
Problema | Cautare binara | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 2.24 kb |
#include<cstdio>
using namespace std;
int m,ls,ld,i,n,intr,x,mij,cp,v[100001];
int main()
{
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",&m);
for(i=1;i<=m;i++)
{
scanf("%d %d",&intr,&x);
if(intr==0)
{
ls=1;
ld=n;
while(ls<=ld)
{
mij=(ls+ld)/2;
if(v[mij]<x)
ls=mij+1;
else
if(v[mij]>x)
ld=mij-1;
else break;
}
if(v[mij]==x)
{
while(v[mij]==x) mij++;
mij--;
printf("%d\n",mij);
}
else printf("-1\n");
}
else
if(intr==1)
{
ls=1;
ld=n;
while(ls<=ld)
{
mij=(ls+ld)/2;
if(v[mij]<x)
ls=mij+1;
else
if(v[mij]>x)
ld=mij-1;
else break;
}
if(v[mij]==x)
{
while(v[mij]==x) mij++;
mij--;
printf("%d\n",mij);
}
else
{
mij=ls;
if(ls>n) mij=n;
while(v[mij]>x)
mij--;
printf("%d\n",mij);
}
}
else
{
ls=1;
ld=n;
while(ls<=ld)
{
mij=(ls+ld)/2;
if(v[mij]<x)
ls=mij+1;
else
if(v[mij]>x)
ld=mij-1;
else break;
}
if(v[mij]==x)
{
while(v[mij]==x) mij--;
mij++;
printf("%d\n",mij);
}
else
{
mij=ls;
if(ls>n) mij=n;
while(v[mij]<x) mij++;
printf("%d\n",mij);
}
}
}
return 0;
}