{"problem":{"name":"判决素数个数","description":{"content":"求 $X$，$Y$ 之间的素数个数（包括 $X$ 和 $Y$）。","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":"LGB2137"},"statements":[{"statement_type":"Markdown","content":"求 $X$，$Y$ 之间的素数个数（包括 $X$ 和 $Y$）。\n\n## Input\n\n两个整数 $X$ 和 $Y$（$1 \\le X,Y \\le 1.1 \\times 10^6$）。\n\n## Output\n\n输出一个整数，表示 $X, Y$ 之间的素数个数（包括 $X$ 和 $Y$）。\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"LGB2137","tags":["素数判断,质数,筛法","函数与递归"],"sample_group":[["1 100","25"]],"created_at":"2026-03-03 11:09:25"}}