Map排序的方式有很多种,这里记录下自己总结的两种比较常用的方式:按键排序(sort by key), 按值排序(sort by value). 1.按键排序 jdk内置的java.util包下的TreeMap<K,V>既可满足此类需求,向其构造方法 TreeMap(Comparator<? super K> comparator) 传入我们自定义的比较器即可实现按键排序. 代码: public class MapSortDemo { public static void mai…
示例代码: #include <stdio.h>#include <stdlib.h> int main(void){ int n = 0 ; int i = 0 , j = 0 , min = 0; int *num ; scanf("%d",&n); num = (int*)malloc(sizeof(int)*n); for (i = 0 ; i < n ; i ++) { scanf("%d",&num[i]);…
https://www.luogu.org/problem/P1327 #include<bits/stdc++.h> #define Ll long long using namespace std; ; map<int,int>F; int a[N],b[N]; int n,m,ans; int main() { scanf("%d",&n); ; i<=n; i++)scanf("%d",&a[i]),b[i]=a…