diff --git a/bitcoin-project/src/main.cpp b/bitcoin-project/src/main.cpp
index dcc6355..cc58363 100644
--- a/bitcoin-project/src/main.cpp
+++ b/bitcoin-project/src/main.cpp
@@ -1,13 +1,74 @@
-#include <iostream>
 #include <mpi.h>
+#include <iostream>
+#include <vector>
+#include <map>
+
 #include "csv_loader.hpp"
 #include "utils.hpp"
-#include "mpi_utils.hpp"
+#include "record.hpp"
+
+// Функция: отобрать записи для конкретного ранга
+std::vector<Record> select_records_for_rank(
+    const std::map<long long, std::vector<Record>>& days,
+    const std::vector<long long>& day_list)
+{
+    std::vector<Record> out;
+    for (auto d : day_list) {
+        auto it = days.find(d);
+        if (it != days.end()) {
+            const auto& vec = it->second;
+            out.insert(out.end(), vec.begin(), vec.end());
+        }
+    }
+    return out;
+}
 
 int main(int argc, char** argv) {
     MPI_Init(&argc, &argv);
 
-    mpi_test();  // просто тест, что всё работает
+    int rank, size;
+    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+    MPI_Comm_size(MPI_COMM_WORLD, &size);
+
+    std::vector<Record> local_records;
+
+    if (rank == 0) {
+        std::cout << "Rank 0 loading CSV..." << std::endl;
+
+        auto records = load_csv("data/data.csv");
+
+        auto days = group_by_day(records);
+        auto parts = split_days(days, size);
+
+        // Рассылаем данные
+        for (int r = 0; r < size; r++) {
+            auto vec = select_records_for_rank(days, parts[r]);
+
+            if (r == 0) {  
+                // себе не отправляем — сразу сохраняем
+                local_records = vec;
+                continue;
+            }
+
+            int count = vec.size();
+            MPI_Send(&count, 1, MPI_INT, r, 0, MPI_COMM_WORLD);
+            MPI_Send(vec.data(), count * sizeof(Record), MPI_BYTE, r, 1, MPI_COMM_WORLD);
+        }
+    }
+    else {
+        // Принимает данные
+        int count = 0;
+        MPI_Recv(&count, 1, MPI_INT, 0, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
+
+        local_records.resize(count);
+        MPI_Recv(local_records.data(), count * sizeof(Record),
+                 MPI_BYTE, 0, 1, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
+    }
+
+    MPI_Barrier(MPI_COMM_WORLD);
+
+    std::cout << "Rank " << rank << " received "
+              << local_records.size() << " records" << std::endl;
 
     MPI_Finalize();
     return 0;
diff --git a/bitcoin-project/src/mpi_utils.cpp b/bitcoin-project/src/mpi_utils.cpp
index 2bf2274..7fd29f4 100644
--- a/bitcoin-project/src/mpi_utils.cpp
+++ b/bitcoin-project/src/mpi_utils.cpp
@@ -1,9 +1,9 @@
+#include "mpi_utils.hpp"
 #include <mpi.h>
 #include <iostream>
 
-void mpi_test() {
+void mpi_print_basic() {
     int rank, size;
-
     MPI_Comm_rank(MPI_COMM_WORLD, &rank);
     MPI_Comm_size(MPI_COMM_WORLD, &size);
 
diff --git a/bitcoin-project/src/mpi_utils.hpp b/bitcoin-project/src/mpi_utils.hpp
index 5563bd9..d712c41 100644
--- a/bitcoin-project/src/mpi_utils.hpp
+++ b/bitcoin-project/src/mpi_utils.hpp
@@ -1,2 +1,2 @@
 #pragma once
-void mpi_test();
+void mpi_print_basic();