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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int BINARY_SEARCH(int *ARR,int &N,int &ITEM)
  5. {
  6.     int LB=0,UB=N-1;
  7.     while(LB<=UB)
  8.     {
  9.         int MID=(LB+UB)/2;
  10.  
  11.         if(ARR[MID]==ITEM)
  12.             return MID;
  13.         else if(ARR[MID]<ITEM)
  14.             LB=MID+1;
  15.         else
  16.             UB=MID-1;
  17.     }
  18.     return -1;
  19. }
  20.  
  21.  
  22. int main()
  23. {
  24.     int N,ITEM,lOC;
  25.     cin>>N;
  26.     int ARR[N];
  27.     for(int i=0;i<N;i++)
  28.         cin>>ARR[i];
  29.     cin>>ITEM;
  30.  
  31.     int LOC=BINARY_SEARCH(ARR,N,ITEM);
  32.  
  33.     if(LOC==-1)
  34.         cout<<"ITEM is not in the ARRAY" <<endl;
  35.     else
  36.         cout<<"ITEM "<<ITEM<<" is in the location "<<LOC+1<<endl;
  37.  
  38.     return 0;
  39. }
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin
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7
11 13 14 16 17 19 20
19
stdout
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ITEM 19 is in the location 6
https://ideone.com/U6SW2I
3
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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