Lambdas and algorithms

#include <algorithm>
#include <iostream>
#include <iterator>
#include <numeric>
#include <string>
#include <utility>
#include <vector>
using namespace std;

int main() {
  vector<pair<string, int>> students = {{"Kavin", 72}, {"Divya", 95}, {"Ravi", 60}, {"Meena", 88}};

  sort(students.begin(), students.end(), [](const auto &a, const auto &b) {
    return a.second > b.second;
  });
  for (const auto &[name, marks] : students) {
    cout << name << " ";
  }
  cout << "\n";

  int passMark = 70;
  auto passed = count_if(students.begin(), students.end(), [passMark](const auto &s) {
    return s.second >= passMark;
  });
  cout << passed << "\n";

  vector<int> marks;
  transform(students.begin(), students.end(), back_inserter(marks), [](const auto &s) { return s.second; });
  cout << accumulate(marks.begin(), marks.end(), 0) << "\n";
  return 0;
}

Divya Meena Kavin Ravi 
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