100 atcoder#ABC159D. [ABC159D] Banned K
[ABC159D] Banned K
Score : points
Problem Statement
We have balls. The -th ball has an integer written on it. For each , solve the following problem and print the answer.
- Find the number of ways to choose two distinct balls (disregarding order) from the balls other than the -th ball so that the integers written on them are equal.
Constraints
- All values in input are integers.
Input
Input is given from Standard Input in the following format:
Output
For each , print a line containing the answer.
5
1 1 2 1 2
2
2
3
2
3
Consider the case for example. The numbers written on the remaining balls are . From these balls, there are two ways to choose two distinct balls so that the integers written on them are equal. Thus, the answer for is .
4
1 2 3 4
0
0
0
0
No two balls have equal numbers written on them.
5
3 3 3 3 3
6
6
6
6
6
Any two balls have equal numbers written on them.
8
1 2 1 4 2 1 4 1
5
7
5
7
7
5
7
5