accounts = {}
for t in [line.strip().split(",") for line in open("input9.txt").readlines()]:
    print(t)
    if t[0] == "None":
        if t[1] in accounts:
            accounts[t[1]] += int(t[2])
        else:
            accounts[t[1]] = int(t[2])
    else:
        accounts[t[0]] -= int(t[2])
        if t[1] in accounts:
            accounts[t[1]] += int(t[2])
        else:
            accounts[t[1]] = int(t[2])

print(len([acc for acc in accounts if accounts[acc] > 10]))