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Problems

# Partial matrix sum

The matrix of integers aij is given, where 1in, 1jm. For all i, j find

#### Input

The first line contains the matrix size n, m (1n, m1000). Each of the next n lines contains m integers aij (1aij1000).

#### Output

Print n rows each containing m numbers Sij.

Time limit 1 second
Memory limit 128 MiB
Input example #1
3 5
1 2 3 4 5
5 4 3 2 1
2 3 1 5 4

Output example #1
1 3 6 10 15
6 12 18 24 30
8 17 24 35 45

Author В.Гольдштейн
Source Зимние сборы в Харькове 2010 День 2