将vector<map<char、set<int>>>转换为vector<map<int、set<char>>>

#include <iostream>
#include <vector>
#include <map>
#include <set>

int main() {
    std::vector<std::map<char, std::set<int>>> originalData = {
        {{'a', {1, 2, 3}}},
        {{'b', {4, 5}}},
        {{'c', {6, 7, 8, 9}}}
    };

    std::vector<std::map<int, std::set<char>>> transformedData;

    for (const auto& originalMap : originalData) {
        std::map<int, std::set<char>> transformedMap;

        for (const auto& originalPair : originalMap) {
            int newKey = static_cast<int>(originalPair.second.size());

            if (transformedMap.find(newKey) == transformedMap.end()) {
                transformedMap[newKey] = {};
            }

            for (const auto& originalValue : originalPair.second) {
                transformedMap[newKey].insert(static_cast<char>(originalValue));
            }
        }

        transformedData.push_back(transformedMap);
    }

    // 输出转换后的数据结构
    for (const auto& transformedMap : transformedData) {
        for (const auto& transformedPair : transformedMap) {
            std::cout << transformedPair.first << ": ";
            for (const auto& transformedValue : transformedPair.second) {
                std::cout << transformedValue << " ";
            }
            std::cout << std::endl;
        }
    }

    return 0;
}

3: a 
2: b 
4: c