From d2f31b91bfbbd8250e2a512750cf2ee7e9b5642a Mon Sep 17 00:00:00 2001
From: pajjilykk <pgoldendragon@gmail.com>
Date: Tue, 28 Apr 2026 15:27:18 +0700
Subject: [PATCH] update 2 main to proper rules

---
 2/main.cpp | 247 ++++++++++++++++++++++-------------------------------
 1 file changed, 100 insertions(+), 147 deletions(-)

diff --git a/2/main.cpp b/2/main.cpp
index 648ef8d..52e0b49 100644
--- a/2/main.cpp
+++ b/2/main.cpp
@@ -1,206 +1,159 @@
-#include <algorithm>
-#include <cstdlib>
-#include <iomanip>
 #include <iostream>
+#include <vector>
+#include <iomanip>
+#include <algorithm>
 #include <random>
-#include <sstream>
-#include <stdexcept>
-#include <string>
+#include <pthread.h>
 #include <sys/time.h>
 #include <unistd.h>
-#include <pthread.h>
-#include <vector>
-#include <mutex>
+#include <sstream>
 
-// ================= CONFIG =================
-constexpr int kDefaultN = 20000;
-constexpr int kPreviewCount = 20;
+// ================= СТРУКТУРЫ =================
+constexpr int NIL = -1;
 
-// ================= GLOBAL CONTROL =================
+struct Node {
+    int value;
+    int next;
+};
+
+struct SortResult {
+    int head;
+    long long comparisons;
+};
+
+struct Args {
+    Node* pool;
+    int head;
+    int depth;
+    SortResult* res_out;
+};
+
+// ================= ГЛОБАЛЬНЫЕ ПЕРЕМЕННЫЕ =================
 int active_threads = 0;
 int max_threads = 4;
+pthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutex_t log_mutex = PTHREAD_MUTEX_INITIALIZER;
 
-pthread_mutex_t thread_mutex = PTHREAD_MUTEX_INITIALIZER;
-std::mutex log_mutex;
-
-// ================= TIME =================
-double get_time() {
-    timeval tv{};
-    gettimeofday(&tv, nullptr);
-    return tv.tv_sec + tv.tv_usec * 1e-6;
-}
-
+// ================= УТИЛИТЫ =================
 std::string now() {
     timeval tv{};
     gettimeofday(&tv, nullptr);
-
     std::ostringstream oss;
     oss << tv.tv_sec << "." << std::setfill('0') << std::setw(6) << tv.tv_usec;
     return oss.str();
 }
 
-// ================= SAFE LOGGING =================
-void log_start(int l, int r, int depth) {
-    std::lock_guard<std::mutex> lock(log_mutex);
-
-    std::cout << "START PID=" << getpid()
-              << " TID=" << pthread_self()
+// Формат лога адаптирован под ваш скрипт analyze_log.py
+void log_event(const std::string& type, int head, int depth) {
+    pthread_mutex_lock(&log_mutex);
+    // Используем head как идентификатор диапазона для парсера
+    std::cout << type << " TID=" << pthread_self()
               << " depth=" << depth
-              << " range=[" << l << "," << r << "] time=" << now()
-              << '\n';
+              << " range=[" << head << "," << head << "]"
+              << " time=" << now() << std::endl;
+    pthread_mutex_unlock(&log_mutex);
 }
 
-void log_end(int l, int r, int depth) {
-    std::lock_guard<std::mutex> lock(log_mutex);
-
-    std::cout << "END   PID=" << getpid()
-              << " TID=" << pthread_self()
-              << " depth=" << depth
-              << " range=[" << l << "," << r << "] time=" << now()
-              << '\n';
-}
-
-// ================= MERGE =================
-void merge_range(int* arr, int l, int m, int r) {
-    std::vector<int> tmp;
-    tmp.reserve(r - l + 1);
-
-    int i = l;
-    int j = m + 1;
-
-    while (i <= m && j <= r) {
-        if (arr[i] <= arr[j]) tmp.push_back(arr[i++]);
-        else tmp.push_back(arr[j++]);
+// ================= ЛОГИКА СПИСКА =================
+void split_list(Node* pool, int head, int& left, int& right) {
+    if (head == NIL || pool[head].next == NIL) {
+        left = head; right = NIL; return;
     }
-
-    while (i <= m) tmp.push_back(arr[i++]);
-    while (j <= r) tmp.push_back(arr[j++]);
-
-    std::copy(tmp.begin(), tmp.end(), arr + l);
+    int slow = head, fast = pool[head].next;
+    while (fast != NIL) {
+        fast = pool[fast].next;
+        if (fast != NIL) { slow = pool[slow].next; fast = pool[fast].next; }
+    }
+    left = head;
+    right = pool[slow].next;
+    pool[slow].next = NIL;
 }
 
-// ================= LOCAL SORT =================
-void local_sort(int* arr, int l, int r) {
-    if (l >= r) return;
-
-    int m = l + (r - l) / 2;
-    local_sort(arr, l, m);
-    local_sort(arr, m + 1, r);
-    merge_range(arr, l, m, r);
+SortResult merge_lists(Node* pool, int l, int r) {
+    long long comps = 0;
+    if (l == NIL) return {r, 0};
+    if (r == NIL) return {l, 0};
+    int res_head = NIL, tail = NIL;
+    auto append = [&](int idx) {
+        if (res_head == NIL) res_head = tail = idx;
+        else { pool[tail].next = idx; tail = idx; }
+    };
+    while (l != NIL && r != NIL) {
+        comps++;
+        if (pool[l].value <= pool[r].value) { int n = pool[l].next; append(l); l = n; }
+        else { int n = pool[r].next; append(r); r = n; }
+    }
+    if (l != NIL) pool[tail].next = l;
+    if (r != NIL) pool[tail].next = r;
+    return {res_head, comps};
 }
 
-// ================= THREAD ARG =================
-struct Args {
-    int* arr;
-    int l;
-    int r;
-    int depth;
-};
-
-void parallel_sort(int* arr, int l, int r, int depth);
+// ================= РЕКУРСИЯ =================
+SortResult parallel_list_sort(Node* pool, int head, int depth);
 
 void* thread_func(void* arg) {
     Args* a = (Args*)arg;
-    parallel_sort(a->arr, a->l, a->r, a->depth);
-    delete a;
+    *(a->res_out) = parallel_list_sort(a->pool, a->head, a->depth);
     return nullptr;
 }
 
-// ================= PARALLEL SORT =================
-void parallel_sort(int* arr, int l, int r, int depth) {
-    log_start(l, r, depth);
-
-    if (l >= r) {
-        log_end(l, r, depth);
-        return;
+SortResult parallel_list_sort(Node* pool, int head, int depth) {
+    log_event("START", head, depth);
+    if (head == NIL || pool[head].next == NIL) {
+        log_event("END", head, depth);
+        return {head, 0};
     }
 
-    int m = l + (r - l) / 2;
+    int left_p, right_p;
+    split_list(pool, head, left_p, right_p);
 
     pthread_t tid;
     bool spawned = false;
+    SortResult res_right = {NIL, 0};
 
-    // ===== thread limit control =====
-    pthread_mutex_lock(&thread_mutex);
+    pthread_mutex_lock(&counter_mutex);
     if (active_threads < max_threads) {
         active_threads++;
         spawned = true;
     }
-    pthread_mutex_unlock(&thread_mutex);
+    pthread_mutex_unlock(&counter_mutex);
 
     if (spawned) {
-        Args* args = new Args{arr, m + 1, r, depth + 1};
+        Args* args = new Args{pool, right_p, depth + 1, &res_right};
         pthread_create(&tid, nullptr, thread_func, args);
 
-        parallel_sort(arr, l, m, depth + 1);
-
+        SortResult res_left = parallel_list_sort(pool, left_p, depth + 1);
         pthread_join(tid, nullptr);
 
-        pthread_mutex_lock(&thread_mutex);
+        pthread_mutex_lock(&counter_mutex);
         active_threads--;
-        pthread_mutex_unlock(&thread_mutex);
+        pthread_mutex_unlock(&counter_mutex);
 
+        SortResult m = merge_lists(pool, res_left.head, res_right.head);
+        delete args;
+        log_event("END", m.head, depth);
+        return {m.head, res_left.comparisons + res_right.comparisons + m.comparisons};
     } else {
-        parallel_sort(arr, l, m, depth + 1);
-        parallel_sort(arr, m + 1, r, depth + 1);
-    }
-
-    merge_range(arr, l, m, r);
-
-    log_end(l, r, depth);
-}
-
-// ================= UTIL =================
-bool parse_int(const char* s, int& out) {
-    try {
-        size_t p;
-        int v = std::stoi(s, &p);
-        if (s[p] != '\0' || v < 0) return false;
-        out = v;
-        return true;
-    } catch (...) {
-        return false;
+        SortResult res_left = parallel_list_sort(pool, left_p, depth + 1);
+        SortResult res_r_seq = parallel_list_sort(pool, right_p, depth + 1);
+        SortResult m = merge_lists(pool, res_left.head, res_r_seq.head);
+        log_event("END", m.head, depth);
+        return {m.head, res_left.comparisons + res_r_seq.comparisons + m.comparisons};
     }
 }
 
-// ================= MAIN =================
 int main(int argc, char* argv[]) {
-    int n = kDefaultN;
+    int n = 10000;
+    if (argc >= 2) n = std::atoi(argv[1]);
+    if (argc >= 3) max_threads = std::atoi(argv[2]);
 
-    if (argc >= 2 && !parse_int(argv[1], n)) {
-        std::cerr << "Invalid N\n";
-        return 1;
+    std::vector<Node> pool(n);
+    std::mt19937 rng(time(0));
+    for (int i = 0; i < n; i++) {
+        pool[i].value = rng() % 100000;
+        pool[i].next = (i == n - 1) ? NIL : i + 1;
     }
 
-    if (argc >= 3 && !parse_int(argv[2], max_threads)) {
-        std::cerr << "Invalid threads\n";
-        return 1;
-    }
-
-    std::vector<int> arr(n);
-
-    std::mt19937 rng(std::random_device{}());
-    std::uniform_int_distribution<int> dist(0, 99999);
-
-    for (int i = 0; i < n; i++) arr[i] = dist(rng);
-
-    std::cout << "Before: ";
-    for (int i = 0; i < std::min(n, kPreviewCount); i++)
-        std::cout << arr[i] << " ";
-    std::cout << "\n\n";
-
-    double t1 = get_time();
-
-    parallel_sort(arr.data(), 0, n - 1, 0);
-
-    double t2 = get_time();
-
-    std::cout << "\nAfter: ";
-    for (int i = 0; i < std::min(n, kPreviewCount); i++)
-        std::cout << arr[i] << " ";
-    std::cout << "\n";
-
-    std::cout << "\nTime: " << (t2 - t1) << " sec\n";
-
+    parallel_list_sort(pool.data(), 0, 0);
     return 0;
 }