zoukankan      html  css  js  c++  java
  • hdu 3552 I can do it! (贪心)

    题 目 :

    Problem Description
    Given n elements, which have two properties, say Property A and Property B. For convenience, we use two integers Ai and Bi to measure the two properties. 
    Your task is, to partition the element into two sets, say Set A and Set B , which minimizes the value of max(x∈Set A) {Ax}+max(y∈Set B) {By}.
    See sample test cases for further details.
     
    Input
    There are multiple test cases, the first line of input contains an integer denoting the number of test cases.
    For each test case, the first line contains an integer N, indicates the number of elements. (1 <= N <= 100000)
    For the next N lines, every line contains two integers Ai and Bi indicate the Property A and Property B of the ith element. (0 <= Ai, Bi <= 1000000000)
     
    Output
    For each test cases, output the minimum value.
     
    Sample Input
    1 3
    1 100
    2 100
    3 1
     
    Sample Output
    Case 1: 3
     

    题 意:

    有n个物品,每个物品有两种属性X和Y。问怎样把这些物品分成两个集合(可空),使得 集合A中的max(X)+集合B中的max(Y)  的值最小。

     代 码 :

     1 #include<iostream>
     2 #include<algorithm>
     3 #include<stdio.h>
     4 
     5 using namespace std;
     6 
     7 struct food
     8 {
     9     int x,y;
    10 
    11 }F[100005];
    12 
    13 bool com( food a,food b)
    14 {
    15     return  a.x>b.x ;
    16 }
    17 
    18 int main( ) {
    19 
    20     int N,n,Min_sum,Max_y,x=0;
    21     cin >>N;
    22     while( N-- ){
    23         cin >>n;
    24         for( int i=1;i<=n;i++)
    25             scanf("%d %d",&F[i].x,&F[i].y);
    26        // if( n==1 ) cout <<"Case " <<++x <<": " <<min(F[1].x,F[1].y) <<endl;
    27        //  这句话 要不要都正确 说明 数据中没有这组特殊数据 ;
    28        // else {
    29             sort(F+1,F+n+1,com);
    30             Min_sum=F[1].x; Max_y=F[1].y;
    31 
    32             for( int i=1;i<=n;i++) {
    33 
    34                 Min_sum= min( Min_sum, F[i].x+Max_y);  //  感觉像排完序之后 , 用隔板隔开 ,看哪种情况是最优的 。
    35                 Max_y= max( Max_y, F[i].y);
    36             }
    37             cout <<"Case " <<++x <<": " <<Min_sum <<endl;
    38        // }
    39     }
    40     return 0;
    41 }
    View Code
  • 相关阅读:
    iOS开发——高级篇——iOS中常见的设计模式(MVC/单例/委托/观察者)
    object_getClassName swift得到类名
    UIGestureRecognizerDelegate设置响应事件优先级
    String to Double in swift
    Unable to boot device in current state:Booted
    xcode Indexing | Loading index...
    swift String to UTF8编码
    进入沙盒目录
    swift objective-c混编操作
    storyboard plain style unsupported in a navigation item
  • 原文地址:https://www.cnblogs.com/lysr--tlp/p/rt.html
Copyright © 2011-2022 走看看