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Cod sursa(job #268283)
#include <stdio.h>
int v[100001],n,m;
int a,x;
int c1(int l,int r,int val)
{
int m;
m=l+(r-l)/2;
if(v[m]==val) return m;
else if(v[m]>val) return c1(l,m-1,val);
else return c1(m+1,r,val);
return -1;
}
int c2(int l,int r,int val)
{
int m;
while(l<r)
{
m=l+(r-l+1)/2;
if(!(v[m]<=x)) r=m-1;
else l=m;
}
return l;
}
int c3(int l,int r,int val)
{
int m;
while(l<r)
{
m=l+(r-l-1)/2;
if(v[m]>=x) r=m;
else l=m+1;
}
return l;
}
int main()
{
freopen("cautbin.in","r",stdin);
freopen("cautbin.out","w",stdout);
scanf("%d",&n);
for(int i=1;i<=n;i++) scanf("%d",&v[i]);
scanf("%d",&m);
while(m)
{
scanf("%d %d",&a,&x);
switch(a)
{
case 0:
printf("%d\n",c1(1,n,x));
break;
case 1:
printf("%d\n",c2(1,n,x));
break;
case 2:
printf("%d\n",c3(1,n,x));
break;
}
m--;
}
fclose(stdin); fclose(stdout);
return 0;
}