diff --git a/f1.cpp b/f1.cpp
index 97ea106..1c6fd30 100644
--- a/f1.cpp
+++ b/f1.cpp
@@ -1,3 +1,4 @@
+#include <cstdint>
 #include "f1.h"
 #include <bits/stdc++.h>
 
@@ -11,36 +12,30 @@ typedef long long ll;
 
 using namespace std;
 
-bool F1::run()
-{
-
+bool F1::run() {
     std::cout << "f1" << std::endl;
 
-    int N, K;
-
-    N = 10000;
-    K = 10000;
+    const int N = 10000;
+    const int K = 10000;
 
-    int total = ((N - 1) * (N - 2)) / 2;
-    if (K > total)
-    {
-        cout << -1 << endl;
-        return 0;
+    int64_t total = static_cast<int64_t>(N - 1) * (N - 2) / 2;
+    if (K > total) {
+        std::cout << -1 << std::endl;
+        return false;
     }
 
-    vector<pair<int, int>> edges;
-    for (int i = 2; i <= N; ++i)
-    {
-        edges.push_back({1, i});
+    std::vector<std::pair<int, int>> edges;
+    edges.reserve(N - 1 + K);
+
+    for (int i = 2; i <= N; ++i) {
+        edges.emplace_back(1, i);
     }
 
-    for (int i = 2; i < N && total > K; ++i)
-    {
-        for (int j = i + 1; j <= N && total > K; ++j, --total)
-        {
-            edges.push_back({i, j});
+    for (int i = 2; i < N && total > K; ++i) {
+        for (int j = i + 1; j <= N && total > K; ++j, --total) {
+            edges.emplace_back(i, j);
         }
     }
 
     return true;
-}
+}
\ No newline at end of file
diff --git a/post_test.sh b/post_test.sh
old mode 100755
new mode 100644