diff --git a/lab10/jacobi/jacobi_mpi.cpp b/lab10/jacobi/jacobi_mpi.cpp
index a05419c..6accbe3 100644
--- a/lab10/jacobi/jacobi_mpi.cpp
+++ b/lab10/jacobi/jacobi_mpi.cpp
@@ -52,7 +52,7 @@ Jacobi::Result JacobiMPI::run(const Matrix &init, double epsilon,
 
     if (rank == 0) {
       MPI_Request send_lower;
-      std::vector<double> send_vec_low = phi[t0].get_row(indexRowGlobalEnd);
+      std::vector<double> send_vec_low = phi[t0].get_row(numRows - 1);
       MPI_Isend(send_vec_low.data(), numCols, MPI_DOUBLE, neighborLower,
                 indexRowGlobalEnd, MPI_COMM_WORLD, &send_lower);
 
@@ -78,7 +78,7 @@ Jacobi::Result JacobiMPI::run(const Matrix &init, double epsilon,
 
     else if (rank == (numProc - 1)) {
       MPI_Request send_upper;
-      std::vector<double> send_vec_up = phi[t0].get_row(indexRowGlobalStart);
+      std::vector<double> send_vec_up = phi[t0].get_row(0);
       MPI_Isend(send_vec_up.data(), numCols, MPI_DOUBLE, neighborUpper,
                 indexRowGlobalStart, MPI_COMM_WORLD, &send_upper);
 
@@ -105,11 +105,11 @@ Jacobi::Result JacobiMPI::run(const Matrix &init, double epsilon,
       MPI_Request send_upper;
       MPI_Request send_lower;
 
-      std::vector<double> send_vec_up = phi[t0].get_row(indexRowGlobalStart);
+      std::vector<double> send_vec_up = phi[t0].get_row(0);
       MPI_Isend(send_vec_up.data(), numCols, MPI_DOUBLE, neighborUpper,
                 indexRowGlobalStart, MPI_COMM_WORLD, &send_upper);
 
-      std::vector<double> send_vec_low = phi[t0].get_row(indexRowGlobalEnd);
+      std::vector<double> send_vec_low = phi[t0].get_row(numRows - 1);
       MPI_Isend(send_vec_low.data(), numCols, MPI_DOUBLE, neighborLower,
                 indexRowGlobalEnd, MPI_COMM_WORLD, &send_lower);