fix: cpp code

Author: yanglbme

solution/3400-3499/3491.Phone Number Prefix/README.md

@@ -106,10 +106,10 @@ public:
         ranges::sort(numbers, [](const string& a, const string& b) {
             return a.size() < b.size();
         });
-        for (size_t i = 0; i < numbers.size(); i++) {
+        for (int i = 0; i < numbers.size(); i++) {
             if (ranges::any_of(numbers | views::take(i), [&](const string& t) {
-                return numbers[i].starts_with(t);
-            })) {
+                    return numbers[i].starts_with(t);
+                })) {
                 return false;
             }
         }

solution/3400-3499/3491.Phone Number Prefix/README_EN.md

@@ -106,10 +106,10 @@ public:
         ranges::sort(numbers, [](const string& a, const string& b) {
             return a.size() < b.size();
         });
-        for (size_t i = 0; i < numbers.size(); i++) {
+        for (int i = 0; i < numbers.size(); i++) {
             if (ranges::any_of(numbers | views::take(i), [&](const string& t) {
-                return numbers[i].starts_with(t);
-            })) {
+                    return numbers[i].starts_with(t);
+                })) {
                 return false;
             }
         }

solution/3400-3499/3491.Phone Number Prefix/Solution.cpp

@@ -6,10 +6,10 @@ class Solution {
         ranges::sort(numbers, [](const string& a, const string& b) {
             return a.size() < b.size();
         });
-        for (size_t i = 0; i < numbers.size(); i++) {
+        for (int i = 0; i < numbers.size(); i++) {
             if (ranges::any_of(numbers | views::take(i), [&](const string& t) {
-                return numbers[i].starts_with(t);
-            })) {
+                    return numbers[i].starts_with(t);
+                })) {
                 return false;
             }
         }