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Update include.hh 

Signed-off-by: subcrip <contact@subc.rip>
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subcrip 2024-05-10 13:39:46 +08:00
parent 326339cc16
commit 1ac86aa595
1 changed files with 8 additions and 0 deletions
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include.hh
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@ -382,4 +382,12 @@ template <ll mdl>
istream& operator>>(istream& in, MLL<mdl>& num) {
return in >> num.val;
}
// miscancellous
template <typename Func, typename RandomIt> void sort_by_key(RandomIt first, RandomIt last, Func extractor) {
std::sort(first, last, [&] (auto&& a, auto&& b) { return std::less<>()(extractor(a), extractor(b)); });
}
template <typename Func, typename RandomIt, typename Compare> void sort_by_key(RandomIt first, RandomIt last, Func extractor, Compare comp) {
std::sort(first, last, [&] (auto&& a, auto&& b) { return comp(extractor(a), extractor(b)); });
}
/////////////////////////////////////////////////////////