Cod sursa(job #651687)

Utilizator I.AlexandruIlie Alexandru I.Alexandru Data 21 decembrie 2011 02:32:33
Problema Cautare binara Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 1.23 kb
#include<fstream>
#define maxn 100001
using namespace std;

int n, j, v[maxn], m, choice, x;
ifstream f("cautbin.in");
ofstream g("cautbin.out");

int c0(int value, int low, int high)
{int mid;
while(low<=high)
     {mid=low+(high-low)/2;
      if(v[mid]==value)
        if(v[mid+1]!=value) 
          return mid+1;
      if(v[mid]>value)
        high=mid-1;
      else low=mid+1; 
     }  
return -1;
}

int c1(int value, int low, int high)
{int mid;
while(low<high)
     {mid=low+(high-low)/2;
      if(v[mid]<=value)
        low=mid+1;
      else high=mid-1; 
     }
mid=low+(high-low)/2;
if(v[mid]>value)
  mid--;     
return mid+1;          
}

int c2(int value, int low, int high)
{int mid;
while(low<high)
     {mid=low+(high-low)/2;
      if(v[mid]>=value)
        high=mid-1;
      else low=mid+1;
     } 
mid=low+(high-low)/2;
if(v[mid]<value)
  mid++;     
return mid+1;          
}

int main()
{f>>n;
for(j=0; j<n; j++)
   f>>v[j];    

f>>m;
for(j=0; j<m; j++)
   {f>>choice;
    f>>x;
    if(choice==0)
      g<<c0(x, 0, n-1);
    else if(choice==1)
           g<<c1(x, 0, n-1);
         else g<<c2(x, 0, n-1);  
    g<<endl;     
   }

f.close();
g.close();
return 0;
}