Убрал поддиректорию

src/utils.cpp

@@ -0,0 +1,25 @@
+#include "utils.hpp"
+
+std::map<DayIndex, std::vector<Record>> group_by_day(const std::vector<Record>& recs) {
+    std::map<DayIndex, std::vector<Record>> days;
+
+    for (const auto& r : recs) {
+        DayIndex day = static_cast<DayIndex>(r.timestamp) / 86400;
+        days[day].push_back(r);
+    }
+
+    return days;
+}
+
+std::vector<std::vector<DayIndex>> split_days(const std::map<DayIndex, std::vector<Record>>& days, int parts) {
+    std::vector<std::vector<DayIndex>> out(parts);
+
+    int i = 0;
+    for (auto& kv : days) {
+        out[i % parts].push_back(kv.first);
+        i++;
+    }
+
+    return out;
+}
+