es2

int* mat_find(Mat* mat, int value, int* n){
    int** matrix = mat->row_ptrs;
    int rows = mat->rows;
    int cols = mat->cols;
    int cont = 0, k = 0;
    for (int i=0; i<rows; i++){
        for (int j=0; j<cols; j++){
            if (matrix[i][j]>value) {
                cont=cont+1;
            }
        }
    }
    *n = cont;
    int* vect = (int*)malloc(cont*sizeof(int));
    for (int i=0; i<rows; i++){
        for (int j=0; j<cols;j++){
            if (matrix[i][j]>value){
                vect[k++]=i*cols+j;
            }
        }
    }
    return vect;
}