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#!/usr/bin/env python3
ADJ = (1, 0), (0, 1), (-1, 0), (0, -1)
for i in range(int(input())):
fences = set()
n, m, k = map(int, input().split())
for j in range(k):
row, col = map(int, input().split())
for dr, dc in ADJ:
r, c = row + dr, col + dc
try:
fences.remove((r, c, row, col))
except KeyError:
fences.add((row, col, r, c))
print(len(fences))
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