Why I am getting runtime error for longest test case? minimum-sub-array with sum


  • 0
    R
     int minSubArrayLen(int s, vector<int>& nums) {
        
         int sum =0; 
        
        // precondition if total sum is less than given sum s 
        for (int i=0; i<nums.size();i++){
            sum +=nums[i];
            if(sum >s)
              break;
        
        }
        
        if(sum<s)
           return 0;
           
           
           
        int size =0, min_size=100000;
        sum =0;
        
        
        for (int start =0,i=0; start<=nums.size()-1 ;){   // start for start of array and i for length 
            
             while (sum <s){
                 
                 
                 sum +=nums[i];
                 i++;
                 
                 size++;
                
             }
             
             if (sum >= s && size <min_size)
                 min_size=size;    // update min size 
                 
            
                 
            while(sum>=s)   {  
                                                    // increment start and go ahead 
             sum -=nums[start];
             size--;
             if(sum>=s)
                if(min_size<size)
                   min_size=size;
             
             start++;
        }
        
            
        
        
        }
        
       return min_size;
        
        
    }
    

    // getting run time error for this testcases

    697439
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  • 0
    Y
    This post is deleted!

  • 0
    C

    I think you made 2 mistakes .
    First , your code :

    while (sum <s)
    {
    sum +=nums[i];
    i++;

             size++;
         }
    

    You don't limit variable i , if sum is always less than s , i increase to infitiny , it definitely results in run-time error because i >= nums.size() has no meaning at all

    And second , imagine what'd happened if variable start always less than nums.size() -1 , you'll never exit the loop .


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