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#include <bits/stdc++.h>
using namespace std;// 比较结构cmp1,按first降序,否则按second升序
struct cmp1{bool operator()(const pair<int,int>& a, const pair<int,int>& b){if(a.first != b.first)return a.first > b.first;elsereturn a.second < b.second;}// 比较结构cmp2,按second升序,否则按first降序
struct cmp2{bool operator()(const pair<int,int>& q1, const pair<int,int>& q2){if(q1.first == q2.first)return q1.second > q2.second;elsereturn q1.first < q2.first;}int main(){
// pair的基本用法pair<int,double> p1(1, 2.2);pair<int,double> p2;p2 = p1;cout << p2.first << " " << p2.second << endl;p2 = make_pair(1,3);cout << p2.first << " " << p2.second << endl;// pair结合其他的用法 pairp3[10]; for(int i = 0; i < 5; ++i){ p3[i] = make_pair(i, i+1); } sort(p3, p3+5, cmp1); for(int i = 0; i < 5; ++i){ cout << p3[i].first << " " << p3[i].second << endl; } vector > p4; for(int i = 0; i < 5; ++i){ p4.push_back({1, i+1}); p4.push_back(make_pair(i, i+1)); } sort(p4.begin(), p4.end(), cmp1); int len = p4.size(); for(int i = 0; i < len; ++i){ cout << p4[i].first << " " << p4[i].second << endl; } priority_queue , vector >, Greater > p5; p5.push({2,2}); p5.push({1,2}); p5.push({2,3}); while(!p5.empty()){ cout << p5.top().first << " " << p5.top().second << endl; p5.top(); p5.pop(); }
}
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