1.2 KB | 1199 chars
"""
[32246: 빙고 막기](https://www.acmicpc.net/problem/32246)
Tier: Bronze 3
Category: constructive
"""
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
SYS_INPUT = True
RECURSION_LIMIT = 10 ** 7
SET_RECURSION = False
BLANK = " "
if SET_RECURSION:
sys.setrecursionlimit(RECURSION_LIMIT)
inp = lambda : sys.stdin.readline().rstrip() if SYS_INPUT else input()
mii = lambda : [*map(int,inp().split())]
mfi = lambda : [*map(float,inp().split())]
ii = lambda : int(inp())
fi = lambda : float(inp())
isplit = lambda : inp().split()
p = print
def gcd(a, b): return gcd(b, a % b) if b > 0 else a
def lcm(a, b): return a * b // gcd(a, b)
def tm_to_i(s):
h,m = map(int, s.split(":"))
return h*60+m
def solve():
n = ii()
l = [inp().split() for _ in range(n + 1)]
cutoff_tm = tm_to_i(inp())
teacher_tm = 0
for a, b in l:
if b == "teacher":
teacher_tm = tm_to_i(a)
break
ans = 0
for a, b in l:
if b == "student":
tm = tm_to_i(a)
if tm >= cutoff_tm and tm >= teacher_tm:
ans += 1
p(ans)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()