classSolution{public:intgetNumberOfK(vector<int>&nums,intk){autol=lower_bound(nums.begin(),nums.end(),k);//正序查找第一个k所在下标autor=upper_bound(nums.begin(),nums.end(),k);//右往左(逆序)returnr-l;//个数 = (最后一个 - 第一个)}}; 1.
first : last; } int main() { std::vector<int> data = { 1, 1, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 6 }; auto lower = std::lower_bound(data.begin(), data.end(), 4); auto upper = std::upper_bound(data.begin(), data.end(), 4); std::copy(lower, upper, std::os...
stack<int> s; stack< int, vector<int> > stk; //覆盖基础容器类型,使用vector实现stk s.empty(); //判断stack是否为空,为空返回true,否则返回false s.size(); //返回stack中元素的个数 s.pop(); //删除栈顶元素,但不返回其值 s.top(); //返回栈顶元素的值,但不删除此元素 s.push(item); ...
讲道理的话,编译器的gcc是不支持__int128这种数据类型的,比如在codeblocks 16.01/Dev C++是无法编译的,但是提交到大部分OJ上是可以编译且能用的。C/C++标准。IO是不认识__int128这种数据类型的,因此要自己实现IO,其他的运算,与int没有什么不同。 但是官方上写了GCC提供了两种128位整数类型,分别是__int128_t...
(1)序列式容器(Sequence containers),每个元素都有固定位置--取决于插入时机和地点,和元素值无关,vector、deque、list; Vector:将元素置于一个动态数组中加以管理,可以随机存取元素(用索引直接存取),数组尾部添加或移除元素非常快速。但是在中部或头部安插元素比较费时; ...
vector<int>::iterator itr; pair< vector<int>::iterator, vector<int>::iterator >vecpair;for(inti =1; i <=20; i++){ v.push_back(i%6); } sort(v.begin(),v.end()); cout<<"array:"<< endl <<""; copy(v.begin(),v.end(),ostream_iterator<int>(cout,"")); ...
binary_search(first_iterator, last_iterator, x)– Tests whether x exists in sorted vector or not. lower_bound(first_iterator, last_iterator, x)– returns an iterator pointing to the first element in the range [first,last) which has a value not less than ‘x’. ...
h> using namespace std; int x[100002],y[100002],Seg[100002][2]; long long sum[100002],maxm; bool memo[100002]; vector<long long> ans; int main() { int n,i; scanf("%d",&n); for(i=1;i<=n;i++) scanf("%d",&x[i]); for(i=1;i<=n;i++) scanf("%d",&y[i]); ...
deq.h = std::deque lst.h = std::list pqu.h = std::priority_queue que.h = std::queue set.h = std::set stk.h = std::stack str.h = std::string ust.h = std::unordered_set vec.h = std::vector Use Configure a CTL container with a built-in or typedef typeT. ...
Unordered associative containers such asunordered_map. These have lower per-element overhead and constant-time lookup, but they can be harder to use correctly and efficiently. Sortedvector. For more information, seeAlgorithms. Don't use C-style arrays. For older APIs that need direct access to...