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Cod sursa(job #545129)
#include <stdio.h>
#include <vector>
#include <algorithm>
using namespace std;
FILE *fin, *fout;
long n, m, tip, v[100010], numar;
int bsearch0 (int p, int u, int key)
{
int m;
while (p <= u) {
m = (p + u) / 2;
if (v[m] <= key)
p = m + 1;
else
u = m - 1;
}
m = (p + u) / 2;
if (v[m] > key) m --;
if (v[m] == key)
return m;
return -1;
}
int bsearch1 (int p, int u, int key)
{
int m, n = u;
while (p < u){
m = (p + u) / 2;
if (v[m] <= key)
p = m + 1;
else
u = m;
}
m = (p + u) / 2;
if (v[m] > key)
-- m;
return m;
}
int bsearch2 (int p, int u, int key)
{
int m;
while (p < u) {
m = (p + u) / 2;
if (v[m] < key)
p = m + 1;
else
u = m;
}
m = (p + u) / 2;
if (v[m] < key)
++ m;
return m;
}
int main()
{
fin = fopen("cautbin.in", "r");
fout = fopen("cautbin.out", "w");
fscanf(fin, "%d", &n);
for (int i = 1; i <= n; i++)
{
fscanf(fin, "%d", &v[i]);
}
fscanf(fin, "%d", &m);
for (int i = 0; i < m; i++)
{
fscanf(fin, "%d%d", &tip, &numar);
switch(tip)
{
case(0):fprintf(fout, "%d\n", bsearch0(1, n, numar)); break;
case(1):fprintf(fout, "%d\n", bsearch1(1, n, numar)); break;
case(2):fprintf(fout, "%d\n", bsearch2(1, n, numar)); break;
default: fprintf(fout, "%d\n", -1);
}
}
fclose(fin);
fclose(fout);
return 0;
}