diff --git "a/BaekJoon/10870_\355\224\274\353\263\264\353\202\230\354\271\230\354\210\2305.cpp" "b/BaekJoon/10870_\355\224\274\353\263\264\353\202\230\354\271\230\354\210\2305.cpp"
new file mode 100644
index 0000000..e51cf44
--- /dev/null
+++ "b/BaekJoon/10870_\355\224\274\353\263\264\353\202\230\354\271\230\354\210\2305.cpp"
@@ -0,0 +1,13 @@
+#include <iostream>
+using namespace std;
+
+int fibo(int n) {
+    if(n==0||n==1) return n;
+    return fibo(n-1) + fibo(n-2);
+}
+int main(){
+    int n;
+    cin>>n;
+    cout<<fibo(n);
+    return 0;
+}
\ No newline at end of file
diff --git "a/BaekJoon/2606_\353\260\224\354\235\264\353\237\254\354\212\244.cpp" "b/BaekJoon/2606_\353\260\224\354\235\264\353\237\254\354\212\244.cpp"
new file mode 100644
index 0000000..5dd4749
--- /dev/null
+++ "b/BaekJoon/2606_\353\260\224\354\235\264\353\237\254\354\212\244.cpp"
@@ -0,0 +1,37 @@
+#include <iostream>
+#include <vector>
+using namespace std;
+
+vector<vector<int>> adj;
+vector<bool> visited;
+int count = 0;
+
+void dfs(int here) {
+    visited[here] = true;
+    for(int i=0; i<adj[here].size(); ++i) {
+        int there = adj[here][i];
+        if(!visited[there]){
+            ++count;
+            dfs(there);
+        }
+    }
+}
+int main(void) {
+    int computer = 0;
+    int pair = 0;
+    cin>>computer;
+    cin>>pair;
+    adj.resize(computer);
+    visited.resize(computer);
+    for(int i=0;i<pair;++i) {
+        int start=0;
+        int end=0;
+        cin>>start>>end;
+        --start; --end;
+        adj[start].push_back(end);
+        adj[end].push_back(start);
+    }
+    dfs(0);
+    cout<<count;
+    return 0;
+}
\ No newline at end of file
diff --git a/BaekJoon/README.md b/BaekJoon/README.md
index 324094a..207795e 100644
--- a/BaekJoon/README.md
+++ b/BaekJoon/README.md
@@ -24,8 +24,8 @@ https://www.acmicpc.net/
 |**10998**|**A\*B**|2020.03.26|1|
 |**1008**|**A/B**|2020.03.26|5|
 |**10869**|**사칙연산**|2020.03.26|1|
-|****|****|||
-|****|****|||
+|**2606**|**바이러스**|2020.04.24|2|
+|**10870**|**피보나치수5**|2020.04.25|1|
 |****|****|||
 |****|****|||
 |****|****|||