#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>
using namespace std;

class
Directory
{
public:
	Directory *parent = nullptr;
	unordered_map<string, Directory*> dirs;
	long direct_size = 0;

	void
	mkdir(string name)
	{
		dirs[name] = new Directory();
		dirs[name]->parent = this;
	}

	void
	mkfile(string name, long size)
	{
		(void) name;
		direct_size += size;
	}

	Directory*
	cd(string path)
	{
		return parent;
	}
};

template<typename F>
long
getSizes(Directory *dir, F&& fn)
{
	long size = dir->direct_size;
	for (auto &c : dir->dirs) {
		size += getSizes(c.second, fn);
	}
	fn(size);
	return size;
}

int
main()
{
	Directory root;
	Directory *pwd = &root;
	for (string line; getline(cin, line); ) {
		if (line.compare(0, 4, "$ cd") == 0) {
			string path = line.substr(5);
			if (path == "/") {
				pwd = &root;
			} else if (path == "..") {
				pwd = pwd->parent;
			} else {
				pwd = pwd->dirs[path];
			}
			if (pwd == nullptr) throw "bad input";
		}
		if (line[0] != '$') {
			int pos = line.find(" ");
			string meta = line.substr(0, pos);
			string name = line.substr(pos + 1);
			if (meta == "dir") {
				pwd->mkdir(name);
			} else {
				pwd->mkfile(name, stol(meta));
			}
		}
	}

	long total1 = 0;
	getSizes(&root, [&](long size){
			if (size <= 100000)
				total1 += size;
	});
	cout << total1 << endl;
}