pat1025. PAT Ranking (25)

1025. PAT Ranking (25)

时间限制

200 ms

内存限制

65536 kB

代码长度限制

16000 B

判题程序

Standard

作者

CHEN, Yue

Programming Ability Test (PAT) is organized by the College of Computer Science and Technology of Zhejiang University. Each test is supposed to run simultaneously in several places, and the ranklists will be merged immediately after the test. Now it is your job to write a program to correctly merge all the ranklists and generate the final rank.

Input Specification:

Each input file contains one test case. For each case, the first line contains a positive number N (<=100), the number of test locations. Then N ranklists follow, each starts with a line containing a positive integer K (<=300), the number of testees, and then K lines containing the registration number (a 13-digit number) and the total score of each testee. All the numbers in a line are separated by a space.

Output Specification:

For each test case, first print in one line the total number of testees. Then print the final ranklist in the following format:

registration_number final_rank location_number local_rank

The locations are numbered from 1 to N. The output must be sorted in nondecreasing order of the final ranks. The testees with the same score must have the same rank, and the output must be sorted in nondecreasing order of their registration numbers.

Sample Input:

2
5
1234567890001 95
1234567890005 100
1234567890003 95
1234567890002 77
1234567890004 85
4
1234567890013 65
1234567890011 25
1234567890014 100
1234567890012 85

Sample Output:

9
1234567890005 1 1 1
1234567890014 1 2 1
1234567890001 3 1 2
1234567890003 3 1 2
1234567890004 5 1 4
1234567890012 5 2 2
1234567890002 7 1 5
1234567890013 8 2 3
1234567890011 9 2 4

---

提交代码

string的相互比较：

 #include<string>
 #include<iostream>
 using namespace std;
 int main(){
     //freopen("D:\\input.txt","r",stdin);
     //a.compare(b)
     //a>b  1
     //a==b 0
     //a<b  -1
     string a="",b="";
     cout<<a.compare(b)<<endl;
     a="";
     b="";
     cout<<a.compare(b)<<endl;
     a="";
     b="";
     cout<<a.compare(b)<<endl;
     a="";
     b="";
     cout<<a.compare(b)<<endl;
     a="";
     b="";
     cout<<a.compare(b)<<endl;
     return ;
 }

比较的思想：
1.整体排序，注意成绩非升序（成绩相同时，编号升序）。

2.

localrank[i]：第i个区域当前的排名，允许成绩相同排名相同。

lastgrade[i]：第i个区域前一个排名的成绩。

localnum[i]：第i个区域已经排名的人数。

 #include<set>
 #include<map>
 #include<cstdio>
 #include<algorithm>
 #include<iostream>
 #include<cstring>
 #include<queue>
 #include<vector>
 #include<cmath>
 using namespace std;
 int localrank[],lastgrade[],localnum[];
 //registration_number final_rank location_number local_rank
 struct person{
     string s;
     int grade,localnum;
 };
 person per[];
 bool cmp(person a,person b){
     if(a.grade==b.grade){
         return a.s.compare(b.s)<;
     }
     return a.grade>b.grade;
 }
 int main(){
     //freopen("D:\\input.txt","r",stdin);
     int n;
     scanf("%d",&n);
     int i,j,k,l;
     per[].grade=;//哨兵
     l=;
     for(i=;i<=n;i++){
         scanf("%d",&k);
         for(j=;j<=k;j++){
             cin>>per[l].s;
             scanf("%d",&per[l].grade);
             per[l++].localnum=i;
         }
         lastgrade[i]=;
     }
     l--;
     sort(per,per+l+,cmp);
     memset(localrank,,sizeof(localrank));
     memset(localnum,,sizeof(localnum));
     int rank;
     cout<<l<<endl;
     for(i=;i<=l;i++){
         cout<<per[i].s<<" ";
         if(per[i].grade<per[i-].grade){
             rank=i;
         }
         cout<<rank<<" "<<per[i].localnum<<" ";
         localnum[per[i].localnum]++;
         if(per[i].grade<lastgrade[per[i].localnum]){
             lastgrade[per[i].localnum]=per[i].grade;
             localrank[per[i].localnum]=localnum[per[i].localnum];
         }
         cout<<localrank[per[i].localnum]<<endl;
     }
     return ;
 }