
Perform matrix multiplication of a diagonal matrix with another matrix:
$$
C[i][j] = A[i] \cdot B[i][j]
$$

## Input
- Diagonal $A$ of size $N$
- Matrix $B$ of size $N \times M$

## Output
- Matrix $C$ of size $N \times M$

## Notes:
- The diagonal matrix is represented by a 1D tensor $A$
- All matrices $\text{B}$ and $\text{C}$ are stored in row-major order
- This problem is adapted from [KernelBench](https://github.com/ScalingIntelligence/KernelBench/blob/main/KernelBench/level1/12_Matmul_with_diagonal_matrices_.py)

Rank	User	Runtime (ms)	GPU	Date
1	648trindade	0.06	B200	2 months ago
2	Emre-Dinc	0.07	B200	about 2 months ago
3	sagarreddypatil	0.07	B200	8 months ago
4	ell-hol	0.09	H100	9 months ago
5	Firojpaudel	0.11	H100	9 months ago
6	sagarreddypatil	0.13	H100	9 months ago
7	ell-hol	0.14	L40S	9 months ago
8	jtang-csmi	0.19	H100	10 months ago
9	sagarreddypatil	0.27	L40S	9 months ago
10	harmya	0.29	L40S	10 months ago
11	doudi25	0.44	H200	6 months ago
12	Emre-Dinc	0.64	T4	about 2 months ago
13	rkpinto7	0.67	T4	9 months ago
14	revanth27	0.67	T4	6 months ago
15	chillenb	0.68	T4	7 months ago
16	laukevin	0.68	T4	8 months ago
17	edumntg	0.68	T4	10 months ago
18	sagarreddypatil	0.69	T4	9 months ago
19	jtang-csmi	0.69	T4	10 months ago
20	Firojpaudel	0.73	T4	9 months ago
21	jcobysagal	0.75	T4	8 months ago
22	yuyan2do	1.57	T4	4 months ago
23	rahimkhan76270	2.55	T4	7 months ago
24	uygarkurt	2.89	T4	about 2 months ago
25	JackeyLove1	19.93	T4	about 1 month ago