{"problem":{"name":"Hitachi String","description":{"content":"A Hitachi string is a concatenation of one or more copies of the string `hi`. For example, `hi` and `hihi` are Hitachi strings, while `ha` and `hii` are not. Given a string $S$, determine whether $S$ ","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"hitachi2020_a"},"statements":[{"statement_type":"Markdown","content":"A Hitachi string is a concatenation of one or more copies of the string `hi`.\nFor example, `hi` and `hihi` are Hitachi strings, while `ha` and `hii` are not.\nGiven a string $S$, determine whether $S$ is a Hitachi string.\n\n## Constraints\n\n*   The length of $S$ is between $1$ and $10$ (inclusive).\n*   $S$ is a string consisting of lowercase English letters.\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$S$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"hitachi2020_a","tags":[],"sample_group":[["hihi","Yes\n\n`hihi` is the concatenation of two copies of `hi`, so it is a Hitachi string."],["hi","Yes"],["ha","No"]],"created_at":"2026-03-03 11:01:14"}}