Cod sursa(job #2306448)
Utilizator | Data | 22 decembrie 2018 13:09:32 | |
---|---|---|---|
Problema | Cautare binara | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.61 kb |
#include<cstdio>
int n,m,i,v[100001],x,y,s,l;
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(l=1;l<=n;l<<=1);
while(m--)
{
scanf("%d%d",&x,&y);
if(x<2)
{
for(s=l,i=0;s;s>>=1)
if(i+s<=n&&v[i+s]<=y)
i+=s;
printf("%d\n",!x&&v[i]!=y?-1:i);
continue;
}
for(s=l,i=n;s;s>>=1)
if(i>s&&v[i-s]>=y)
i-=s;
printf("%d\n",i);
}
}