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A思路：主要是注意格式问题，每两组输出间要有空行，所以最后不必多出空行；#include#include#include#includeusing namespace std;int main(){ int t; cin>>t; while(t--) { int n... 阅读全文
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A regular palindrome is a string of numbers or letters that is the same forward as backward. For example, the string "ABCDEDCBA" is a ... 阅读全文
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A common typing error is to place the hands on the keyboard one row to the right of the correct position. So "Q" is typed as "W" and "... 阅读全文
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TeX is a typesetting language developed by Donald Knuth. It takes source text together with a few typesetting instructions and produce... 阅读全文