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Cod sursa(job #289774)
#include<fstream>
#define dim 100001
using namespace std;
long long a[dim],n,x;
long long binary_search(unsigned long x)
{long long i,step;
for(step=1;step<n;step<<=1);
for(i=0;step;step>>=1)
if(i+step<n&&a[i+step]<=x)
i+=step;
return i;
}
int main()
{long long h,y,m,i;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
f>>n;
for(i=1;i<=n;i++)
f>>a[i];
f>>m;
for(i=1;i<=m;i++)
{f>>h>>x;
if(h==0) {y=binary_search(x);
if(a[y]!=x)g<<-1<<'\n';
else g<<y<<'\n';}
else if(h==1) {y=binary_search(x);
if(a[n]<=x)g<<n<<'\n';
else if(a[y]!=x)g<<y<<'\n';
else g<<y<<'\n';}
else if(h==2) {y=binary_search(x);
if(a[y]!=x)g<<y+1<<'\n';
else if(a[n]<=x) g<<n<<'\n';
else g<<y<<'\n';}
}
f.close();
g.close();
return 0;
}