LeetCode 2995: Viewers Turned Streamers Solution

Master LeetCode problem 2995 (Viewers Turned Streamers), 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.

2995. Viewers Turned Streamers

Hard

Database

Problem Explanation

Explanation:

This problem asks us to find the maximum sum of viewer counts "turned into" streamer counts. We can approach this problem using dynamic programming. We can view this problem as a knapsack problem where we have items (viewers) with weights (viewer counts) and values (streamer counts). Our goal is to maximize the value while keeping the total weight within a given limit.

We can create a 2D array dp where dp[i][j] represents the maximum value that can be achieved using the first i viewers and having a total viewer count of exactly j. We can fill out this array iteratively by considering each viewer and either including or excluding them in our calculation.

At the end, the maximum value would be present in dp[N][S], where N is the total number of viewers and S is the total sum of viewer counts.

Solution Code

class Solution {
    public int maxViewerTurnedStreamers(int[] viewers, int[] streamers) {
        int N = viewers.length;
        int S = 0;
        for (int viewer : viewers) {
            S += viewer;
        }

        int[][] dp = new int[N + 1][S + 1];

        for (int i = 1; i <= N; i++) {
            for (int j = 0; j <= S; j++) {
                dp[i][j] = dp[i - 1][j]; // Don't include viewer i
                if (j >= viewers[i - 1]) {
                    dp[i][j] = Math.max(dp[i][j], dp[i - 1][j - viewers[i - 1]] + streamers[i - 1]); // Include viewer i
                }
            }
        }

        return dp[N][S];
    }
}

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