#include <cstdint>
#include <fstream>
#include <iostream>
#include <string>

int main() {
  std::fstream inputFile("input");
  std::string currentLine;
  int16_t counter = 50, number = 0, password = 0;

  while (std::getline(inputFile, currentLine)) {
    number = std::stoi(currentLine.substr(1));
    counter = (counter + ((currentLine[0] == 'L') * 2 - 1) * number) % 100;
    password += counter == 0 ? 1 : 0;
  }
  std::cout << password << std::endl;
  return 0;
}