fixed major bugs

testcases/1.in

@@ -0,0 +1,21 @@
+ADDTEAM T1
+ADDTEAM T2
+START DURATION 1000 PROBLEM 6
+SUBMIT A BY T1 WITH Accepted AT 1
+SUBMIT B BY T2 WITH Accepted AT 2
+SUBMIT C BY T2 WITH Accepted AT 8
+SUBMIT D BY T1 WITH Accepted AT 9
+FLUSH
+QUERY_RANKING T1
+QUERY_RANKING T2
+FREEZE
+SUBMIT B BY T1 WITH Accepted AT 10
+SUBMIT A BY T2 WITH Accepted AT 13
+SUBMIT D BY T2 WITH Accepted AT 17
+SUBMIT C BY T1 WITH Accepted AT 20
+QUERY_RANKING T1
+QUERY_RANKING T2
+SCROLL
+QUERY_RANKING T1
+QUERY_RANKING T2
+END