查找std::pair的std::vector中的最小值和最大值

我想找出向量的最小值/最大值 pair<int, std::string>

我的代码:

#include <iostream>
#include <vector>
#include <string>

int main()
{
    std::vector<std::pair<int, std::string>> pairs;
    pairs = {{6,"a"}, {4,"b"}, {5,"c"}, {8,"d"}, {7,"e"}};

    int min = 0, max = 0;

    //how to find out min/max?

    std::cout << "Minimum Number : " << min << '\n';
    std::cout << "Maximum Number : " << max << '\n';
}

我想要的结果是:

Minimum Value : 4
Maximum Value : 8
Program ended with exit code: 0

编辑时间:

std::sort(pairs.begin(), pairs.end());
min = pairs[0].first;
max = pairs[pairs.size()-1].first;

虽然它的工作,我想学习一个更简单,更快的解决方案比这个。