for_each(first, last, pred)返回pred，对所有i在[first, last)中，执行pred(*i) find(first, last, value)返回第一个i在[first, last)中，*i == value find_if(first, last, pred)返回第一个i在[first, last)中，pred(*i) is true adjacent_find(first, last)返回第一个i, *i == *(i + 1)adjacent_find(first, last, pred)返回第一个i, pred(*i, *(i + 1)) is true find_first_of(first1, last1, first2, last2)返回第一个i在[first1, last1)中，且*i == *any[first2, last2)find_first_of(first1, last1, first2, last2, pred)返回第一个i在[first1, last1)中，且pred(*i, *any[first2, last2)) is true count(first, last, value)返回i的个数，*i == valuecount(first, last, value, n)返回void, n = count(first, last, value) count_if(first, last, pred)返回i的个数，pred(*i) is truecount_if(first, last, pred, n)返回void, n = count_if(first, last, pred) mismatch(first1, last1, first2)返回第1个pair(i = first1 + n, j = first2 + n)，*i != *jmismatch(first1, last1, first2, pred)返回第1个pair(i = first1 + n, j = first2 + n)，pred(*i, *j) is false equal(first1, last1, first2)返回true当且仅当2序列完全相同，否则falseequal(first1, last1, first2, pred)同上，相同函数由pred(*i, *j)比较是否相等 search(first1, last1, first2, last2)返回第一个i在[first1, last1)中，equal(i, i + (last2 - first2), first2) is truesearch(first1, last1, first2, last2, pred)返回第一个i在[first1, last1)中，equal(i, i + (last2 - first2), first2, pred) is true search_n(first, last, n, value)返回第一个i在[first, last)中，且[i, i + n)全为valuesearch_n(first, last, n, value, pred)返回第一个i在[first, last)中，且j在[i, i + n)中,pred(*j, value) is true find_end(first1, last1, first2, last2)返回最后一个i在[first1, last1)中，equal(i, i + (last2 - first2), first2) is truefind_end(first1, last1, first2, last2, pred)返回最后一个i在[first1, last1)中，equal(i, i + (last2 - first2), first2, pred) is true

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