text: Count subarrays having sum modulo K same as the length of the subarray | Function that counts the subarrays having sum modulo k equal to the length of subarray ; Stores the count of subarrays ; Stores prefix sum of the array ; Calculate prefix sum array ; Generate all the subarrays ; Check if this subarray is a valid subarray or not ; Total count of subarrays ; Given arr [ ] ; Size of the array ; Given K ; Function call
code: def countSubarrays ( a , n , k ) : NEW_LINE INDENT ans = 0 NEW_LINE pref = [ ] NEW_LINE pref . append ( 0 ) NEW_LINE for i in range ( n ) : NEW_LINE INDENT pref . append ( ( a [ i ] + pref [ i ] ) % k ) NEW_LINE DEDENT for i in range ( 1 , n + 1 , 1 ) : NEW_LINE INDENT for j in range ( i , n + 1 , 1 ) : NEW_LINE INDENT if ( ( pref [ j ] - pref [ i - 1 ] + k ) % k == j - i + 1 ) : NEW_LINE INDENT ans += 1 NEW_LINE DEDENT DEDENT DEDENT print ( ans , end = ' ▁ ' ) NEW_LINE DEDENT arr = [ 2 , 3 , 5 , 3 , 1 , 5 ] NEW_LINE N = len ( arr ) NEW_LINE K = 4 NEW_LINE countSubarrays ( arr , N , K ) NEW_LINE