{"trustable":true,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\u003cscript\u003e window.katexOptions \u003d { disable: true }; \u003c/script\u003e\n\u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {\n inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027], [\u0027$\u0027,\u0027$\u0027]],\n displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027], [\u0027$$\u0027,\u0027$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003eTác giả đã rời khỏi câu chuyện về Vasiliy, vì vậy đây chỉ là một mô tả công việc chính thức.\u003c/p\u003e\u003cp\u003eBạn được cho \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eq\u003c/i\u003e\u003c/span\u003e truy vấn và một multiset \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eA\u003c/i\u003e\u003c/span\u003e, ban đầu chỉ chứa số nguyên \u003cspan class\u003d\"tex-span\"\u003e0\u003c/span\u003e. Có ba loại truy vấn:\u003c/p\u003e\u003col\u003e \u003cli\u003e \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e+ x\u003c/span\u003e\"\u0026nbsp;— thêm số nguyên \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e vào multiset \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eA\u003c/i\u003e\u003c/span\u003e.\u003c/li\u003e\u003cli\u003e \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e- x\u003c/span\u003e\"\u0026nbsp;— xóa một lần xuất hiện của số nguyên \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e khỏi multiset \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eA\u003c/i\u003e\u003c/span\u003e. Đảm bảo rằng ít nhất một \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e có trong multiset \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eA\u003c/i\u003e\u003c/span\u003e trước truy vấn này.\u003c/li\u003e\u003cli\u003e \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e? x\u003c/span\u003e\"\u0026nbsp;— bạn được cho số nguyên \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e và cần tính giá trị \u003cimg align\u003d\"middle\" class\u003d\"tex-formula\" src\u003d\"CDN_BASE_URL/fd3bcfa3b72b9a957661761f1c453793?v\u003d1714092097\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e, tức là giá trị lớn nhất của phép XOR (hay còn gọi là XOR) giữa số nguyên \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003c/span\u003e và một số nguyên nào đó từ multiset \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eA\u003c/i\u003e\u003c/span\u003e.\u003c/li\u003e\u003c/ol\u003e\u003cp\u003eMultiset là một tập hợp, trong đó các phần tử bằng nhau được phép.\u003c/p\u003e"}},{"title":"Nhập","value":{"format":"HTML","content":"\u003cp\u003eDòng đầu tiên của đầu vào chứa một số nguyên duy nhất \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eq\u003c/i\u003e\u003c/span\u003e (\u003cspan class\u003d\"tex-span\"\u003e1 ≤ \u003ci\u003eq\u003c/i\u003e ≤ 200 000\u003c/span\u003e)\u0026nbsp;— số lượng truy vấn mà Vasiliy phải thực hiện.\u003c/p\u003e\u003cp\u003eMỗi trong số \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eq\u003c/i\u003e\u003c/span\u003e dòng tiếp theo của đầu vào chứa một trong ba ký tự \u0027\u003cspan class\u003d\"tex-font-style-tt\"\u003e+\u003c/span\u003e\u0027, \u0027\u003cspan class\u003d\"tex-font-style-tt\"\u003e-\u003c/span\u003e\u0027 hoặc \u0027\u003cspan class\u003d\"tex-font-style-tt\"\u003e?\u003c/span\u003e\u0027 và một số nguyên \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003csub class\u003d\"lower-index\"\u003e\u003ci\u003ei\u003c/i\u003e\u003c/sub\u003e\u003c/span\u003e (\u003cspan class\u003d\"tex-span\"\u003e1 ≤ \u003ci\u003ex\u003c/i\u003e\u003csub class\u003d\"lower-index\"\u003e\u003ci\u003ei\u003c/i\u003e\u003c/sub\u003e ≤ 10\u003csup class\u003d\"upper-index\"\u003e9\u003c/sup\u003e\u003c/span\u003e). Đảm bảo rằng luôn có ít nhất một truy vấn thuộc loại thứ ba.\u003c/p\u003e\u003cp\u003eLưu ý, số nguyên \u003cspan class\u003d\"tex-span\"\u003e0\u003c/span\u003e luôn có trong tập hợp \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eA\u003c/i\u003e\u003c/span\u003e.\u003c/p\u003e"}},{"title":"Đầu ra","value":{"format":"HTML","content":"\u003cp\u003eĐối với mỗi truy vấn thuộc loại \u0027\u003cspan class\u003d\"tex-font-style-tt\"\u003e?\u003c/span\u003e\u0027 in ra một số nguyên\u0026nbsp;— giá trị lớn nhất của phép XOR giữa số nguyên \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003ex\u003c/i\u003e\u003csub class\u003d\"lower-index\"\u003e\u003ci\u003ei\u003c/i\u003e\u003c/sub\u003e\u003c/span\u003e và một số nguyên từ multiset \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eA\u003c/i\u003e\u003c/span\u003e.\u003c/p\u003e"}},{"title":"Ví dụ","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\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\n+ 8\n+ 9\n+ 11\n+ 6\n+ 1\n? 3\n- 8\n? 3\n? 8\n? 11\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e11\n10\n14\n13\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e"}},{"title":"Ghi chú","value":{"format":"HTML","content":"\u003cp\u003eSau năm hoạt động đầu tiên, multiset \u003cspan class\u003d\"tex-span\"\u003e\u003ci\u003eA\u003c/i\u003e\u003c/span\u003e chứa các số nguyên \u003cspan class\u003d\"tex-span\"\u003e0\u003c/span\u003e, \u003cspan class\u003d\"tex-span\"\u003e8\u003c/span\u003e, \u003cspan class\u003d\"tex-span\"\u003e9\u003c/span\u003e, \u003cspan class\u003d\"tex-span\"\u003e11\u003c/span\u003e, \u003cspan class\u003d\"tex-span\"\u003e6\u003c/span\u003e và \u003cspan class\u003d\"tex-span\"\u003e1\u003c/span\u003e.\u003c/p\u003e\u003cp\u003eCâu trả lời cho truy vấn thứ sáu là số nguyên \u003cimg align\u003d\"middle\" class\u003d\"tex-formula\" src\u003d\"CDN_BASE_URL/5e4ff5512abfce14907f7c3215fac78d?v\u003d1714092097\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e\u0026nbsp;— lớn nhất trong các số nguyên \u003cimg align\u003d\"middle\" class\u003d\"tex-formula\" src\u003d\"CDN_BASE_URL/24212faa8ca787d9740dac896afc8951?v\u003d1714092097\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e, \u003cimg align\u003d\"middle\" class\u003d\"tex-formula\" src\u003d\"CDN_BASE_URL/622ff2fd3a8777e98e5f2bfc756e0db2?v\u003d1714092097\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e, \u003cimg align\u003d\"middle\" class\u003d\"tex-formula\" src\u003d\"CDN_BASE_URL/d7400db5ab1ec0617674f988273b92e5?v\u003d1714092097\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e, \u003cimg align\u003d\"middle\" class\u003d\"tex-formula\" src\u003d\"CDN_BASE_URL/24faf21fee6013d5e1937b11387dbc28?v\u003d1714092097\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e và \u003cimg align\u003d\"middle\" class\u003d\"tex-formula\" src\u003d\"CDN_BASE_URL/ec850bcea8c20dc9ca472bcc2c09eea2?v\u003d1714092097\" style\u003d\"max-width: 100.0%;max-height: 100.0%;\"\u003e.\u003c/p\u003e"}}]}