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Cod sursa(job #233711)
#include<stdio.h>
int a[100005];
int n;
int m;
int poz;
int b;
int c;
int BS1(int s, int d, int val)
{
while (s <= d)
{
int mij = (s + d) / 2;
if (val < a[mij]) d = mij - 1;
if (val > a[mij]) s = mij + 1;
if (val == a[mij])
{
poz = mij;
s = d;
}
}
return s;
}
int BS0(int s, int d, int val)
{
while (s <= d)
{
int mij = (s + d) / 2;
if (val < a[mij]) d = mij - 1;
if (val > a[mij]) s = mij + 1;
if (val == a[mij])
{
poz = mij;
s = mij + 1;
}
}
return 0;
}
int main()
{
freopen("cautbin.in","r",stdin);
freopen("cautbin.out","w",stdout);
scanf("%d",&n);
for(int i = 1; i <= n; i++)
scanf("%d", &a[i]);
scanf("%d",&m);
for(int i = 1; i <= m; i++)
{
scanf("%d %d", &b, &c);
if (b == 0)
{
poz = -1;
BS0(1,n,c);
printf("%d \n",poz);
}
if (b == 1)
{
poz = BS1(1,n,c);
if (a[poz-1] < c && a[poz] > c)
poz --;
printf("%d \n",poz);
}
if (b == 2)
{
poz = BS1(1,n,c);
if (a[poz+1] > c && a[poz] < c)
poz ++;
printf("%d \n",poz);
}
}
}