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unordered_map::find(KeyType key) instead, which returns
unordered_map::iterator, essentially pointer tostd::pair< KeyType,
ValueType >.
Or you can use unordered_map::operator[](KeyType key) to get access to
element pointed by the key variable. Note that it will create new
element in case it doesn't exist yet.
See http://en.cppreference.com/w/cpp/container/unordered_map for more info.
standardized std::unordered_map instead of tr1::unordered_map
Fix #9