'commit'

TangDou/CSP-J/AcWingTraining/T1/ip_check.cpp

@@ -0,0 +1,58 @@
+#include <bits/stdc++.h>
+using namespace std;
+
+int w[5];
+bool check(string addr) {
+  memset(w, -1, sizeof w);
+  // 使用 stringstream 替代 sscanf
+  stringstream ss(addr);
+  char dot1, dot2, dot3, colon;
+  ss >> w[0] >> dot1 >> w[1] >> dot2 >> w[2] >> dot3 >> w[3] >> colon >> w[4];
+
+  // 验证格式是否正确
+  if (dot1 != '.' || dot2 != '.' || dot3 != '.' || colon != ':')
+    return false;
+
+  // 验证数值范围
+  for (int i = 0; i < 5; i++) {
+    if (w[i] < 0)
+      return false;
+    if (i < 4 && w[i] > 255)
+      return false;
+    if (i == 4 && w[i] > 65535)
+      return false;
+  }
+
+  // 验证转换后的字符串是否与原字符串相同
+  stringstream ss2;
+  ss2 << w[0] << '.' << w[1] << '.' << w[2] << '.' << w[3] << ':' << w[4];
+  return ss2.str() == addr;
+}
+
+int main() {
+  int n;
+  cin >> n;
+  unordered_map<string, int> hash;
+  for (int i = 1; i <= n; i++) {
+    string type, addr;
+    cin >> type >> addr;
+    if (type == "Server") {
+      if (!check(addr))
+        puts("ERR");
+      else if (hash.count(addr))
+        puts("FAIL");
+      else {
+        hash[addr] = i;
+        puts("OK");
+      }
+    } else {
+      if (!check(addr))
+        puts("ERR");
+      else if (!hash.count(addr))
+        puts("FAIL");
+      else
+        cout << hash[addr] << endl;
+    }
+  }
+  return 0;
+}