528 B | 528 chars
import sys
from math import sqrt, pi, sin
inp = lambda : sys.stdin.readline()[:-1]
mii = lambda x = " ": [*map(int,inp().split(x))]
mfi = lambda x = " ": [*map(float,inp().split(x))]
ii = lambda : int(inp())
n = ii()
a = []
b = []
l = [inp().split() for i in range(n)]
for i in l:
k = int(i[1])
if i[0] == 'M':
a.append(k)
else:
b.append(k)
if len(a) == 0:
a.append(0)
if len(b) == 0:
b.append(0)
print("M" if sum(a) * len(b) > sum(b) * len(a) else ("J" if sum(a) * len(b) < sum(b) * len(a) else "V"))