[수학][Matrix] 행렬 Matrix

[수학][Matrix] 행렬 Matrix

1. 행렬 덧셈

for(int i = 0; i < n; i++)    {
    for(int j = 0; j < n; j++)    {
        ans[i][j] = a[i][j] + b[i][j];
    }
}

2. 행렬 곱셈

 * a : n x m    b = m x n        --> ans : n x n

for(int i = 0; i < n; i++)    {
    for(int j = 0; j < n; j++)    {
 
        ans[i][j] = 0;
 
        for(int k = 0; k < m; k++)    {
            ans[i][j] += a[i][k] * b[k][j];
        }
    }
}

행렬 관련 문제

https://www.acmicpc.net/problem/10830