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c_cpp
2 months ago
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#include <iostream>
#include <vector>
#include <map>
#include <string>
#include <sstream>
#include <iomanip>
#include <chrono>

bool check(const std::vector<std::string>& log) {
    std::tm tm = {};
    std::istringstream ss(log[2] + " " + log[1]);
    ss >> std::get_time(&tm, "%Y-%m-%d %H:%M:%S");
    return !ss.fail();
}

std::vector<std::vector<std::string>> solution(const std::vector<std::vector<std::string>>& logs) {
    std::map<std::string, std::map<std::string, int>> mapping;

    for (const auto& log : logs) {
        if (check(log)) {
            mapping[log[0]][log[2]]++;
        }
    }

    std::vector<std::vector<std::string>> result;
    for (const auto& user : mapping) {
        for (const auto& date : user.second) {
            result.push_back({user.first, date.first, std::to_string(date.second)});
        }
    }
    return result;
}
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