17 months ago

Dp • 0

Varanasi

QUESTION -1
SOLUTION : - 

• ^{int ans = -1;}
• ^{for(int i=0;i<arr.size();i++){}
• ^{if(arr[i]==x){}
• ^{ans = i+1;}
• ^}
• ^}
• ^{return ans;}
• ^}

Time complexity :- O(n)
Space Complexity :- O(1)

QUESTION -2
SOLUTION : -

• int sum = 0;
• for(int i=0;i<arr.size();i++){
• if(pow(2,i)-1<arr.size()){
• sum+=arr[pow(2,i)-1];
• } 
• }
• return sum;
• }
  
  Time complexity :- O(n)
  Space Complexity :- O(1)