{"problem":{"name":"验证子串","description":{"content":"输入两个字符串，验证其中一个串是否为另一个串的子串。","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":"LGB2118"},"statements":[{"statement_type":"Markdown","content":"输入两个字符串，验证其中一个串是否为另一个串的子串。\n\n## Input\n\n两行，每行一个字符串。\n\n## Output\n\n若第一个串 $s_1$ 是第二个串 $s_2$ 的子串，则输出`(s1) is substring of (s2)`；\n\n否则，若第二个串 $s_2$ 是第一个串 $s_1$ 的子串，输出`(s2) is substring of (s1)`；\n\n否则，输出 `No substring`。\n\n[samples]\n\n## Note\n\n对于 $100 \\%$ 的数据，字符串长度在 $30$ 以内。","is_translate":false,"language":"English"}],"meta":{"iden":"LGB2118","tags":["字符串（入门）"],"sample_group":[["abc\ndddncabca","abc is substring of dddncabca"],["aaa\nbbb","No substring"]],"created_at":"2026-03-03 11:09:25"}}