{"trustable":true,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cdiv class\u003d\"tw-content\"\u003e\u003cp class\u003d\"tw-paragraph tw-block\"\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003eChúng ta sẽ gọi một số là \"số nguyên tố gương\", nếu nó là số nguyên tố và số viết ngược lại cũng là số nguyên tố.\u003c/span\u003e\u003c/p\u003e\u003cp class\u003d\"tw-paragraph tw-block\"\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003eTìm số lượng \"số nguyên tố gương\" từ \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003ea\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e đến \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003eb\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e.\u003c/span\u003e\u003c/p\u003e\u003cdiv class\u003d\"tw-image tw-block\"\u003e\u003cimg src\u003d\"CDN_BASE_URL/3decd531fe59b581b922cc7a75a01126?v\u003d1702582285\" alt\u003d\"\" title\u003d\"\"\u003e\u003c/div\u003e\u003cdiv class\u003d\"eo-problem-input\"\u003e\u003ch2\u003eDữ liệu nhập\u003c/h2\u003e\u003cdiv\u003e\u003cp class\u003d\"tw-paragraph tw-block\"\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003eHai số nguyên \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003ea\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e và \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003eb\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e (\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003e1\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e ≤ \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003ea\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e ≤ \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003eb\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e ≤ \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003e10000\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e).\u003c/span\u003e\u003c/p\u003e\u003c/div\u003e\u003c/div\u003e\u003cdiv class\u003d\"eo-problem-output\"\u003e\u003ch2\u003eDữ liệu xuất\u003c/h2\u003e\u003cdiv\u003e\u003cp class\u003d\"tw-paragraph tw-block\"\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003eIn ra số lượng \"số nguyên tố gương\" từ \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003ea\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e đến \u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline tw-style-bold\"\u003eb\u003c/span\u003e\u003cspan class\u003d\"tw-text tw-inline\"\u003e bao gồm cả hai số.\u003c/span\u003e\u003c/p\u003e\u003c/div\u003e\u003c/div\u003e\u003cdiv class\u003d\"eo-problem-output\"\u003e\u003ch2\u003eVí dụ\u003c/h2\u003e\u003cdiv\u003e\u003cdiv style\u003d\"margin-bottom: 20px\"\u003e\u003ctable class\u003d\"vjudge_sample\"\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e10 25\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e3\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e\u003c/div\u003e"}}]}