diff --git a/internal/ceres/block_jacobian_writer.cc b/internal/ceres/block_jacobian_writer.cc
index e0f6ec0..a70660f 100644
--- a/internal/ceres/block_jacobian_writer.cc
+++ b/internal/ceres/block_jacobian_writer.cc
@@ -1,5 +1,5 @@
 // Ceres Solver - A fast non-linear least squares minimizer
-// Copyright 2015 Google Inc. All rights reserved.
+// Copyright 2022 Google Inc. All rights reserved.
 // http://ceres-solver.org/
 //
 // Redistribution and use in source and binary forms, with or without
@@ -69,8 +69,7 @@
   // matrix. Also compute the number of jacobian blocks.
   int f_block_pos = 0;
   int num_jacobian_blocks = 0;
-  for (int i = 0; i < residual_blocks.size(); ++i) {
-    ResidualBlock* residual_block = residual_blocks[i];
+  for (auto* residual_block : residual_blocks) {
     const int num_residuals = residual_block->NumResiduals();
     const int num_parameter_blocks = residual_block->NumParameterBlocks();
 
@@ -152,7 +151,7 @@
 }
 
 std::unique_ptr<SparseMatrix> BlockJacobianWriter::CreateJacobian() const {
-  CompressedRowBlockStructure* bs = new CompressedRowBlockStructure;
+  auto* bs = new CompressedRowBlockStructure;
 
   const vector<ParameterBlock*>& parameter_blocks =
       program_->parameter_blocks();