Log Truncation - Google Top Interview Questions
Problem Statement :
You are given a list of integers logs and an integer limit. Each element in logs[i] represents the size of logs generated by user i. limit represents the total size of logs you can store in your system. Return the largest x such that if we truncate every log in logs to be at most size x, the sum of the remaining log sizes is at most limit. If no log needs to be truncated, return the largest log size. Constraints 1 ≤ n ≤ 100,000 where n is the length of logs 1 ≤ limit < 2 ** 31 Example 1 Input logs = [50, 20, 1000, 50, 400] limit = 300 Output 90 Explanation If we truncate logs to 90, then we get [50, 20, 90, 50, 90] and its sum is 300 Example 2 Input logs = [2, 3, 7] limit = 100 Output 7 Explanation No message needs to be truncated, so we return the max log size.
Solution :
Solution in C++ :
int solve(vector<int>& logs, int limit) {
int n = logs.size();
int low = 0, high = *max_element(begin(logs), end(logs));
auto check = [&](int mid) {
int sum = 0;
for (int i = 0; i < n; i++) {
sum += (logs[i] <= mid ? logs[i] : mid);
}
return sum <= limit;
};
while (low <= high) {
int mid = (low + high) / 2;
if (check(mid)) {
low = mid + 1;
} else {
high = mid - 1;
}
}
return high;
}
Solution in Python :
class Solution:
def solve(self, logs, limit):
s, n = 0, len(logs)
for i, x in enumerate(sorted(logs)):
if s + x * (n - i) >= limit:
return (limit - s) // (n - i)
s += x
return max(logs)
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