LeetCode 1336: Number of Transactions per Visit Solution

Master LeetCode problem 1336 (Number of Transactions per Visit), a hard challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

1336. Number of Transactions per Visit

Hard

Database

Problem Explanation

Explanation:

To solve this problem, we can use a dynamic programming approach. We can define a 2D array dp where dp[i][j] represents the maximum profit we can make up to visit j with i transactions. We can then iterate over the transactions and visits to fill in the dp array based on the following conditions:

If we do not make a transaction at visit j, then dp[i][j] = dp[i][j-1] since the profit remains the same.
If we make a transaction at visit j, then we need to consider the maximum profit we can get by either selling at visit j or carrying over the profit from previous visits with one less transaction.

Finally, the answer will be the maximum profit we can make with the given number of transactions.

Time Complexity: O(transactions * visits) Space Complexity: O(transactions * visits)

: :

Solution Code

class Solution {
    public int maxProfit(int[] visits, int transactions) {
        int n = visits.length;
        int[][] dp = new int[transactions + 1][n];
        
        for (int i = 1; i <= transactions; i++) {
            int maxDiff = -visits[0];
            for (int j = 1; j < n; j++) {
                dp[i][j] = Math.max(dp[i][j - 1], visits[j] + maxDiff);
                maxDiff = Math.max(maxDiff, dp[i - 1][j] - visits[j]);
            }
        }
        
        return dp[transactions][n - 1];
    }
}

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