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function parent(dir) {
p = match(dir, "/[^/]+$");
return substr(dir, 1, p-1);
}
/\$ cd \// {
cwd = "/";
next;
}
/\$ cd \.\./ {
cwd = parent(cwd);
next;
}
/\$ cd/ {
cwd = cwd "/" $3;
}
/^[0-9]+/ {
for (dir = cwd; dir != ""; dir = parent(dir)) {
dirs[dir] += $1;
}
}
END {
for (dir in dirs) {
if (dirs[dir] > 100000) continue;
sum += dirs[dir];
}
print sum;
}
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