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Cod sursa(job #181296)
#include <stdio.h>
#define Nmax 100001
int N,M,x,y,m,r;
short int v[Nmax];
int cauta0(int a,int b,int m)
{
while(a<b)
{
m/=2;
if(a>=b && v[m]!=x)
break;
if(v[m]>x)
{b=m-1; m=a+m-1;}
else
if(v[m]<x)
{a=m+1; m=m+1+b;}
if(v[m]==x)
{
while(v[m]==x)
{ ++m;}
printf("%d\n",m-1);
return 1;
}
}
return 0;
}
void cauta1(int a,int b,int x)
{
while(a<b)
{
m=(a+b)/2;
if (v[m]<x)
a=m+1;
else
b=m-1;
}
m=(a+b)/2;
if (v[m]>x)
--m;
printf("%d\n", m);
}
void cauta2(int a,int b,int m)
{
while(a<b)
{
m=(a+b)/2;
if (v[m]<x)
a=m+1;
else
b=m-1;
}
m=(a+b)/2;
if (v[m]<x)
++m;
printf("%d\n", m);
}
int main()
{
freopen("cautbin.in", "r",stdin);
freopen("cautbin.out", "w",stdout);
scanf("%d", &N);
for(int i=1;i<=N;++i)
scanf("%d",&v[i]);
scanf("%d", &M);
for(int i=1;i<=M;++i)
{
scanf("%d%d", &y,&x);
m=1+N;
switch(y)
{
case 0: { if(!cauta0(1,N,x)) printf("-1\n"); break;}
case 1: { cauta1(1,N,x); break;}
case 2: { cauta2(1,N,x); break;}
}
}
return 0;
}