A3558 | $Student List for Course (25)$

来源官方 / 2012

时间限制1s

内存限制128MB

通过 / 提交0/0

题目描述

Zhejiang University has 40000 students and provides 2500 courses. Now given the registered course list of each student, you are supposed to output the student name lists of all the courses.

输入格式

Each input file contains one test case. For each case, the first line contains 2 numbers: N ( <=40000), the total number of students, and K ( <=2500), the total number of courses. Then N lines follow, each contains a student's name (3 capital English lett

输出格式

For each test case, print the student name lists of all the courses in increasing order of the course numbers. For each course, first print in one line the course number and the number of registered students, separated by a space. Then output the students

输入输出样例

输入 #1

10 5
ZOE1 2 4 5
ANN0 3 5 2 1
BOB5 5 3 4 2 1 5
JOE4 1 2
JAY9 4 1 2 5 4
FRA8 3 4 2 5
DON2 2 4 5
AMY7 1 5
KAT3 3 5 4 2
LOR6 4 2 4 1 5

输出 #1

1 4
ANN0
BOB5
JAY9
LOR6
2 7
ANN0
BOB5
FRA8
JAY9
JOE4
KAT3
LOR6
3 1
BOB5
4 7
BOB5
DON2
FRA8
JAY9
KAT3
LOR6
ZOE1
5 9
AMY7
ANN0
BOB5
DON2
FRA8
JAY9
KAT3
LOR6
ZOE1

C++ 编辑器

输入

输出

A3558 | Student List for Course (25)

题目描述

输入格式

输出格式

输入输出样例

A3558 | $Student List for Course (25)$