comparator 类
vector 里面的
lintcode 391 飞机起降问题
static bool cmp(const vector<int> o1,vector<int> o2){if(o1[0]!=o2[0]){return o1[0]< o2[0];}return o1[1]<o2[1];// 小于号默认升序}
要加static,因为sort是个静态函数,在类外需要可以调用,所以调用只能用静态(如果写在类里)
class Nodes {public:int value;int pos;Nodes(int value, int pos) {this->value = value;this->pos = pos;}};class Solution {public:/** @param nums: A list of integers* @return: A list of integers includes the index of the first number and the index of the last number*/static bool cmp(const Nodes* a,const Nodes* b) {return a->value < b->value;}vector<int> subarraySumClosest(vector<int>& nums) {// write your code herevector <Nodes *> s;vector <int> res(2);Nodes* temp= new Nodes(0, -1);s.push_back(temp);int sum = 0, len = nums.size();for (int i = 0; i < len; i++) {sum += nums[i];Nodes* temp= new Nodes(sum, i);s.push_back(temp);}sort(s.begin(), s.end(), cmp);len = s.size();int ans = INT_MAX;for (int i = 0; i < len - 1; i++) {if ((s[i + 1]->value - s[i]->value) < ans) {ans = s[i + 1]->value - s[i]->value;//cout << ans;res[0] = min(s[i]->pos, s[i + 1]->pos) + 1;res[1] = max(s[i]->pos, s[i + 1]->pos);}}return res;}};
queue 里面
structure cmp
struct cmp{bool operator()(const node& a, const node& b){return a.key>b.key;// 大于号默认小顶堆}}
string 和 int 相互转化
int temp = num;vector <int> tempRes;string str = to_string(num);int intStr = atoi(str.c_str());
vector知识点
某一些项放在另外一项之后
res.insert(res.end(), temp.begin(), temp.end());
xi
