Pagini recente » Cod sursa (job #1409372) | Cod sursa (job #1057314) | Cod sursa (job #551891) | Cod sursa (job #98864) | Cod sursa (job #995414)
Cod sursa(job #995414)
#include<stdio.h>
#define NMAX 10000
int v[NMAX];
int search0(int f, int l, int x) {
int m;
while (f < l) {
m = f + (l - f) / 2;
if(v[m] < x)
l = m - 1;
else
f = m + 1;
}
m = f + (l - f) / 2;
if (v[m] > x)
m--;
if (v[m] != x)
return -1;
return m;
}
int search1(int f, int l, int x) {
int m;
while (f <= l) {
m = f + (l - f) / 2;
if(v[m] < x)
l = m - 1;
else
f = m + 1;
}
m = f + (l - f) / 2;
if (v[m] > x)
m--;
return m;
}
int search2(int f, int l, int x) {
int m;
while (f <= l) {
m = f + (l - f) / 2;
if(v[m] <= x)
l = m - 1;
else
f = m + 1;
}
m = f + (l - f) / 2;
if (v[m] < x)
m++;
if (v[m] != x)
return -1;
return m;
}
int main() {
int i, n, x, c, r, t;
freopen("cautbin.in", "r", stdin);
freopen("cautbin.out", "w", stdout);
scanf("%d", &n);
for(i = 1; i <= n; i++)
scanf("%d", &v[i]);
scanf("%d", &t);
for (i = 0; i < t; i++) {
scanf("%d %d", &c, &x);
switch(c) {
case 0: r = search0(1, n, x);
break;
case 1: r = search1(1, n, x);
break;
case 2: r = search2(1, n, x);
break;
}
printf("%d\n", r);
}
return 0;
}