LeetCode 1688: Count of Matches in Tournament Solution
Master LeetCode problem 1688 (Count of Matches in Tournament), a easy 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.
1688. Count of Matches in Tournament
Problem Explanation
Explanation:
- To determine the number of matches played in the tournament until a winner is decided, we need to simulate the tournament based on the given rules.
- We keep track of the total number of matches played in each round and reduce the number of teams until there is only one winner.
- For each round, if the number of teams is even, we divide the teams by 2 and add the matches played to the total count. If the number of teams is odd, we subtract 1 from the number of teams, divide by 2, and add the matches played to the total count.
- We repeat this process until there is only one team left as the winner.
Time Complexity: O(log n)
Space Complexity: O(1)
:
Solution Code
class Solution {
public int numberOfMatches(int n) {
int matches = 0;
while (n > 1) {
matches += n / 2;
n = (n + 1) / 2;
}
return matches;
}
}Try It Yourself
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