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exclusive-time-of-functions.cpp
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exclusive-time-of-functions.cpp
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// Time: O(n)
// Space: O(n)
class Solution {
public:
vector<int> exclusiveTime(int n, vector<string>& logs) {
vector<int> result(n);
stack<int> stk;
int prev = 0;
for (const auto& log : logs) {
vector<string> tokens = split(log, ':');
if (tokens[1] == "start") {
if (!stk.empty()) {
result[stk.top()] += stoi(tokens[2]) - prev;
}
stk.emplace(stoi(tokens[0]));
prev = stoi(tokens[2]);
} else {
result[stk.top()] += stoi(tokens[2]) - prev + 1;
stk.pop();
prev = stoi(tokens[2]) + 1;
}
}
return result;
}
private:
vector<string> split(const string& s, const char delim) {
vector<string> tokens;
stringstream ss(s);
string token;
while (getline(ss, token, delim)) {
tokens.emplace_back(token);
}
return tokens;
}
};