Subset Sum Problem Interview Bit

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 public class Solution {

    public int solve(int[] arr, int sum) {
        
        //Base Condition
        int n=arr.length;
        boolean t[][]=new boolean[n+1][sum+1];
            int a=0;
            for(int i=0;i<n+1;i++){
                for(int j=0;j<sum+1;j++){
                    if(i==0){
                        t[i][j]=false;
                        
                       
                    }
                    if(j==0){
                        t[i][j]=true;
                        
                        
                    }
                }
            }
            
            
            for(int i=1;i<n+1;i++){
                for(int j=1;j<sum+1;j++){
                    if(arr[i-1]>j){
                        t[i][j]=t[i-1][j];
                    }
                    else{
                        t[i][j]=(t[i-1][j]) || (t[i-1][j-arr[i-1]]); 
                    }
                }
            }
          boolean a1=t[n][sum];
           if(a1==true){
               return 1; 
           }
           else{
               return 0;
           }
        
        
        
        
    }
    
}

  

TIME:O(N*SUM)

SPACE:O(N*SUM)



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