689 B | 689 chars
import sys
from math import sqrt, pi, sin, factorial
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = " " : [*map(int,inp().split(x))]
mfi = lambda x = " " : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n = ii()
temp = -30
oxy = 0
ocean = 0
for _ in range(n):
k, a = input().split()
a = int(a)
if k == "temperature":
temp += a
elif k == "oxygen":
oxy += a
else:
ocean += a
if 9 <= ocean and 8 <= temp and 14 <= oxy:
p("liveable")
else:
p("not liveable")
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
solve()