D - Banned K
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D - Banned K
Score : $400$ points
Problem Statement
We have $N$ balls. The $i$-th ball has an integer $A_i$ written on it.
For each $k=1, 2, ..., N$, solve the following problem and print the answer.
- Find the number of ways to choose two distinct balls (disregarding order) from the $N-1$ balls other than the $k$-th ball so that the integers written on them are equal.
Constraints
- $3 \leq N \leq 2 \times 10^5$
- $1 \leq A_i \leq N$
- All values in input are integers.
Input
Input is given from Standard Input in the following format:
Output
For each $k=1,2,...,N$, print a line containing the answer.
5
1 1 2 1 2
2
2
3
2
3
Consider the case $k=1$ for example. The numbers written on the remaining balls are $1,2,1,2$.
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 $k=1$ is $2$.
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