{"problem":{"name":"A Barricade","description":{"content":"Summer vacation ended at last and the second semester has begun. You, a Kyoto University student, came to university and heard a rumor that somebody will barricade the entrance of your classroom. The ","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":1000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"kupc2016_a"},"statements":[{"statement_type":"Markdown","content":"Summer vacation ended at last and the second semester has begun. You, a Kyoto University student, came to university and heard a rumor that somebody will barricade the entrance of your classroom. The barricade will be built just before the start of the $A$\\-th class and removed by Kyoto University students just before the start of the $B$\\-th class. All the classes conducted when the barricade is blocking the entrance will be cancelled and you will not be able to attend them. Today you take $N$ classes and class $i$ is conducted in the $t_i$\\-th period. You take at most one class in each period. Find the number of classes you can attend.\n\n## Constraints\n\n*   $1 \\leq N \\leq 1000$\n*   $1 \\leq A < B \\leq 10^9$\n*   $1 \\leq t_i \\leq 10^9$\n*   All $t_i$ values are distinct.\n\n## Input\n\n$N$, $A$ and $B$ are given on the first line and $t_i$ is given on the $(i+1)$\\-th line.\n\n$N$ $A$ $B$\n$t1$\n:\n$tN$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"kupc2016_a","tags":[],"sample_group":[["5 5 9\n4\n3\n6\n9\n1","4\n\nYou can not only attend the third class."],["5 4 9\n5\n6\n7\n8\n9","1\n\nYou can only attend the fifth class."],["4 3 6\n9\n6\n8\n1","4\n\nYou can attend all the classes."],["2 1 2\n1\n2","1\n\nYou can not attend the first class, but can attend the second."]],"created_at":"2026-03-03 11:01:14"}}