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Cod sursa(job #708072)
//http://infoarena.ro/problema/cautbin
#include <cstdio>
using namespace std;
int n,a[100001],m;
void citire()
{
scanf("%d", &n);
for(int i=1; i<=n; i++)
scanf("%d", &a[i]);
scanf("%d", &m);
}
int caut(int val)
{
int poz,i=0;
for(poz=1; poz<n; poz<<=1);
while(poz && a[i]!=val)
{
if(poz+i<=n && a[poz+i]<=val)
i+=poz;
poz>>=1;
}
return i;
}
int main()
{
int caz, val;
freopen("cautbin.in","r",stdin);
freopen("cautbin.out","w",stdout);
citire();
while(m)
{
m--;
scanf("%d%d", &caz, &val);
int poz=caut(val);
if(caz==0)
{
if(a[poz]!=val)
{
printf("-1\n");
continue;
}
while(a[poz]==a[poz+1]) poz++;
printf("%d\n", poz);
continue;
}
if(caz==1)
{
while(a[poz]==a[poz+1]) poz++;
printf("%d\n", poz);
continue;
}
if(caz==2)
{
if(a[poz]!=val)
{
printf("%d\n", poz+1);
continue;
}
while(a[poz]==a[poz-1]) poz--;
printf("%d\n", poz);
continue;
}
}
return 0;
}