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Cod sursa(job #285277)
#include <stdio.h>
#define dim 100100
int n, m, v[dim];
int caut_bin(int x)
{
int lo=1, hi=n, mid;
while (lo<=hi)
{
mid=lo+(hi-lo)/2;
if (v[mid]==x) return x;
if (x<v[mid]) hi=mid-1;
else lo=mid+1;
}
return -1;
}
int main()
{
int i, op, x, poz;
freopen("cautbin.in", "r", stdin);
freopen("cautbin.out", "w", stdout);
scanf("%d\n", &n);
for (i=1; i<=n; i++) scanf("%d ", &v[i]);
scanf("%d\n", &m);
for (i=1; i<=m; i++)
{
scanf("%d %d\n", &op, &x);
if (op==0)
{
poz=caut_bin(x);
if (poz==-1) printf("-1\n");
else
{
while (v[poz]==x) poz++;
printf("%d\n", poz-1);
}
}
else if (op==1)
{
poz=caut_bin(x);
if (v[poz]==x)
{
while (v[poz]==x) poz--;
printf("%d\n", poz);
}
else
{
while (v[poz]<x) poz++;
while (v[poz]>x) poz--;
printf("%d\n", poz);
}
}
else if (op==2)
{
poz=caut_bin(x);
if (v[poz]==x)
{
while (v[poz]==x) poz++;
printf("%d\n", poz);
}
else
{
while (v[poz]>x) poz--;
while (v[poz]<x) poz++;
printf("%d\n", poz);
}
}
}
return 0;
}