What happens in the program presented in this section if the input values are all equal? What if there are no duplicated values?

#include <iostream>

int main() {
  int curVal = 0, val = 0;
  if (std::cin >> curVal) {
    int cnt = 1;
    while (std::cin >> val) {
      if (val == curVal)
        ++cnt;
      else {
        std::cout << curVal << " occurs "
                  << cnt << " time(s)" << std::endl;
        curVal = val;
        cnt = 1;
      }
    }
    std::cout << curVal << " occurs "
              << cnt << " time(s)" << std::endl;
  }
  return 0;
}

Output:

3 7 8 5 3 3 4 8 
3 occurs 1 time(s)
7 occurs 1 time(s)
8 occurs 1 time(s)
5 occurs 1 time(s)
3 occurs 2 time(s)
4 occurs 1 time(s)