#!/usr/bin/env python

import sys


def solve(input: list[str]) -> int:
    def parse_turn(input: str) -> int:
        direction = input[0]
        clicks = int(input[1:])
        return clicks * (1 if direction == "R" else -1)

    def parse(input: list[str]) -> list[int]:
        return [parse_turn(turn) for turn in input]

    turns = parse(input)
    start = 50
    zeros = 0
    for delta in turns:
        if delta < 0:
            to_zero = (start % 100) or 100
        else:
            to_zero = 100 - (start % 100)
        start += delta
        if abs(delta) >= to_zero:
            zeros += (abs(delta) - to_zero) // 100 + 1
    return zeros


def main() -> None:
    input = sys.stdin.read().splitlines()
    print(solve(input))


if __name__ == "__main__":
    main()