附件:https://files.buuoj.cn/files/aa4f6c7e8d5171d520b95420ee570e79/a9d22a0e-928d-4bb4-8525-e38c9481469e.rar 题解 拿到程序先进行查壳,避免做过多无用功 确认是无壳,32位可执行文件,直接将其拖入到IDAPro中 直接f5大法,分析伪代码 int __cdecl main_0(int argc, const char **argv, const char **envp) { size_t v3;…

BUU-刮开有奖 附件:https://files.buuoj.cn/files/abe6e2152471e1e1cbd9e5c0cae95d29/8f80610b-8701-4c7f-ad60-63861a558a5b.exe 题解 查壳 程序分析 INT_PTR __stdcall DialogFunc(HWND hDlg, UINT a2, WPARAM a3, LPARAM a4) { const char *v4; // esi const char *v5; // edi int v…

BUU SimpleRev 附件 https://files.buuoj.cn/files/7458c5c0ce999ac491df13cf7a7ed9f1/SimpleRev 题解 查壳 拖入iad64进行静态分析 关键伪代码 unsigned __int64 Decry() { char v1; // [rsp+Fh] [rbp-51h] int v2; // [rsp+10h] [rbp-50h] int v3; // [rsp+14h] [rbp-4Ch] int i; // [rsp+…

附件:https://files.buuoj.cn/files/7458c5c0ce999ac491df13cf7a7ed9f1/SimpleRev 题解 查壳 64位ELF文件,无壳 IDApro处理,f5 int __cdecl __noreturn main(int argc, const char **argv, const char **envp) { int v3; // eax char v4; // [rsp+Fh] [rbp-1h] while ( 1 ) { while (…

问题: Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return –321   Have you thought about this? Here are some good questions to ask before coding. Bonus points for you if you have already thought through this! If the in…

题目 逆波兰表达式求值 在逆波兰表达法中,其有效的运算符号包括 +, -, *, / .每个运算对象可以是整数,也可以是另一个逆波兰计数表达. 样例 ["2", "1", "+", "3", "*"] -> ((2 + 1) * 3) -> 9 ["4", "13", "5", "/", "+"]…

原题链接:http://oj.leetcode.com/problems/evaluate-reverse-polish-notation/ 题目描述: Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another expression. Some example…

［抄题］: Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another expression. Note: Division between two integers should truncate toward zero. The given RPN expr…

求在 逆波兰表示法 中算术表达式的值.有效的运算符号包括 +, -, *, / .每个运算对象可以是整数,也可以是另一个逆波兰计数表达.例如:  ["2", "1", "+", "3", "*"] -> ((2 + 1) * 3) -> 9  ["4", "13", "5", "/", "+"]…

Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another expression. Some examples: ["2", "1", "+", "3", "*"] -&g…