add sync_with_stdio

code/Tips.cpp

@@ -20,3 +20,6 @@ __builtin_ctz(unsigned int) // number of trailing 0-bits
 // __builtin_ctz(0) is undefined
 __builtin_popcount(int) // number of 1-bits
 // __builtin_popcount(0110b) = 2
+
+// desynchronise standard i/o
+ios::sync_with_stdio(false);