1 files changed, 23 insertions, 0 deletions
diff --git a/codeforces/ThreeDoors/main.cpp b/codeforces/ThreeDoors/main.cpp
new file mode 100644
index 0000000..b585a68
--- /dev/null
+++ b/codeforces/ThreeDoors/main.cpp
@@ -0,0 +1,23 @@
+#include<bits/stdc++.h>
+
+using namespace std;
+
+int main () {
+	ios_base::sync_with_stdio(false);
+	cin.tie(NULL);
+	int tt;
+	cin >> tt;
+	while(tt--){
+    int key, a, b, c;
+    cin >> key >> a >> b >> c;
+    int behindDoors[3] = {a, b, c};
+    int ans = 1;
+    while(behindDoors[key - 1]) {
+      cerr << behindDoors[key - 1] << endl;
+      key = behindDoors[key - 1];
+      ans++;
+    }
+    cerr << endl;
+    cout << ((ans == 3) ? "YES" : "NO") << endl;
+	}
+}