{"problem":{"name":"等差数列末项计算","description":{"content":"等差数列是一个很有趣的数列，它的任何相邻两项的差相等。 现在给出一个等差数列的前两项 $a_1,a_2$ 的值，求第 $n$ 项是多少。","description_type":"Markdown"},"platform":"Luogu","limit":{"time_limit":1000,"memory_limit":131072},"difficulty":{"LuoguStyle":"P1"},"is_remote":true,"is_sync":true,"sync_url":null,"sign":"LGB2032"},"statements":[{"statement_type":"Markdown","content":"等差数列是一个很有趣的数列，它的任何相邻两项的差相等。\n\n现在给出一个等差数列的前两项 $a_1,a_2$ 的值，求第 $n$ 项是多少。\n\n## Input\n\n一行，包含三个整数 $a_1,a_2,n$（$-100 \\le a_1,a_2 \\le 100$，$0<n \\le 1000$。）\n\n## Output\n\n一个整数，即第 $n$ 项的值。\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"LGB2032","tags":["顺序结构"],"sample_group":[["1 4 100","298"]],"created_at":"2026-03-03 11:09:25"}}