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Cod sursa(job #669697)
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int a[100], n, x, y, m, i;
int caut_bin0(int x)
{
int st=1, dr=n;
while(st<=dr)
{
int mij=(st+dr)/2;
if(x==a[mij] && a[mij]<a[mij+1]) return mij;
if(x>=a[mij]) st=mij;
else dr=mij;
}
return -1;
}
int caut_bin1(int x)
{
int st=1, dr=n;
while(st<=dr)
{
int mij=(st+dr)/2;
if(a[mij]<=x && a[mij+1]>x) return mij;
else if(a[mij]<=x && a[mij-1]<=x) st=mij;
else if(a[mij]>x && a[mij+1]>x) dr=mij;
}
}
int caut_bin2(int x)
{
int st=1, dr=n;
while(st<=dr)
{
int mij=(st+dr)/2;
if(a[mij]>=x && a[mij-1]<x) return mij;
else if(a[mij]>=x && a[mij+1]>=x) dr=mij;
else if(a[mij]<x && a[mij+1]<x) st=mij;
}
}
int main()
{
f>>n;
for(i=1; i<=n; ++i) f>>a[i];
for(f>>m; m; --m)
{
f>>x>>y;
if(x==0) g<<caut_bin0(y)<<"\n";
else if(x==1) g<<caut_bin1(y)<<"\n";
else if(x==2) g<<caut_bin2(y)<<"\n";
}
return 0;
}