diff --git a/src/7/16/T633666.cpp b/src/7/16/T633666.cpp
index ba81da1..fa963df 100644
--- a/src/7/16/T633666.cpp
+++ b/src/7/16/T633666.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <random>
 #include <vector>
 #include <algorithm>
 #include <unordered_map>
@@ -20,6 +21,7 @@ bool ispsf[maxn + 10];
 long prF[maxn + 10], cnt_sieveF = 0;
 
 
+
 unordered_map<long, long> cache;
 
 
@@ -149,6 +151,10 @@ int main() {
         fibidx++;
     }
 
+    // random_device rd{};
+    // if(rd()%2){
+    //     return 0;
+    // }
     
     for (long i = 0; i < t; i++) {
         long x = que[i].first;