{ "data": { "question": { "questionId": "2638", "questionFrontendId": "2495", "categoryTitle": "Algorithms", "boundTopicId": 2008703, "title": "Number of Subarrays Having Even Product", "titleSlug": "number-of-subarrays-having-even-product", "content": null, "translatedTitle": "积是偶数的子数组的数目", "translatedContent": null, "isPaidOnly": true, "difficulty": "Medium", "likes": 1, "dislikes": 0, "isLiked": null, "similarQuestions": "[]", "contributors": [], "langToValidPlayground": null, "topicTags": [ { "name": "Array", "slug": "array", "translatedName": "数组", "__typename": "TopicTagNode" }, { "name": "Math", "slug": "math", "translatedName": "数学", "__typename": "TopicTagNode" }, { "name": "Dynamic Programming", "slug": "dynamic-programming", "translatedName": "动态规划", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": null, "stats": "{\"totalAccepted\": \"55\", \"totalSubmission\": \"73\", \"totalAcceptedRaw\": 55, \"totalSubmissionRaw\": 73, \"acRate\": \"75.3%\"}", "hints": [ "The product of elements in a subarray is even if it contains at least one even element.", "Iterate from left to right and save the last index of an even number. Let that saved index be “j”.", "It can be seen that every subarray starting from earlier than index “j” and ending at the current index has an even product." ], "solution": null, "status": null, "sampleTestCase": "[9,6,7,13]", "metaData": "{\n \"name\": \"evenProduct\",\n \"params\": [\n {\n \"name\": \"nums\",\n \"type\": \"integer[]\"\n }\n ],\n \"return\": {\n \"type\": \"long\"\n }\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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