Why the output is not 6?

Question

#include
#include
#include

using namespace std;
int main() {
  vector heights = {
    100.3,
    120.8,
    132.7,
    160.4,
    150.3,
    144.9,
    170.5,
    125.6
  };
  auto myLambda = count_if(heights.begin(), heights.end(), [](int x) {
    return x > 125.00;
  });
  cout << "The number of participants will be: " << myLambda;
  return 0;
}

The output:The number of participants will be: 5 [Program finished]Why the output is not 6?