CoinDCX SDE OA 2025 | Suspicious Transaction Ring & Smart Contract Ledger

Problem 1 - Suspicious Transaction Ring Problem Statement CoinDCX monitors fund movement between wallet addresses to detect money laundering activities. You are given: N → Number of wallets transactions[i] = [sender, receiver, amount] A suspicious ring exists if funds can eventually return to the original wallet through a sequence of transactions. Determine whether at least one suspicious ring exists. Constraints Constraint 1 ≤ N ≤ 105 1 ≤ transactions.length ≤ 105 Test Case Input Output N = 3 transactions = ...