[笔记]Leetcode详解1

1.vector
用vector定义二维数组:
vector> array(row_num, vector(rol_num,0));
2.unique(array,array + len_of_array)
头文件:iostream.h
功能：去除一个数组相邻的重复元素。
注意，vector就是 unique(vec.begin(),vec.end())
3.distance()
template
typename iterator_traits::difference_type
distance (InputIterator first, InputIterator last);
功能：Calculates the number of elements between first
and last