Update 18258.cpp

encrypted-def · web-flow · commit f8c22cde9040 · 2021-08-22T11:48:31.000+09:00
diff --git a/0x06/solutions/18258.cpp b/0x06/solutions/18258.cpp
@@ -1,11 +1,44 @@
 // Authored by : BaaaaaaaaaaarkingDog
 // Co-authored by : -
-// http://boj.kr/****************
+// http://boj.kr/ef22176f28054f269d7a61e4356f3660
 #include <bits/stdc++.h>
 using namespace std;
 
-int main(void){
+int main(void) {
   ios::sync_with_stdio(0);
   cin.tie(0);
   
-}
+  queue<int> Q;
+  int n;
+  cin >> n;
+  while(n--){
+    string q;
+    cin >> q;
+    if(q=="push"){
+      int val;
+      cin >> val;
+      Q.push(val);
+    }
+    else if(q=="pop"){
+      if(Q.empty()) cout << -1 << '\n';
+      else{
+        cout << Q.front() << '\n';
+        Q.pop();
+      }
+    }
+    else if(q=="size"){
+      cout << Q.size() << '\n';
+    }
+    else if(q=="empty"){
+      cout << Q.empty() << '\n';
+    }    
+    else if(q=="front"){
+      if(Q.empty()) cout << -1 << '\n';
+      else cout << Q.front() << '\n';
+    }
+    else{ // back
+      if(Q.empty()) cout << -1 << '\n';
+      else cout << Q.back() << '\n';
+    }
+  }
+}
