Description Given N arithmetic expressions, can you tell whose result is closest to 9? Input Line 1: N (1 <= N <= 50000).Line 2..N+1: Each line contains an expression in the format of "a op b" where a, b are integers (-10000 <= a, b <…

Problem Introduction In the problem, your goal is to add parentheses to a given arithmetic expression to maximize its value. Problem Description Task.Find the maximum value of an arithmetic expression by specifying the order of applying its arithmeti…

leetcode 逆波兰式求解 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", "…

Arithmetic Expression   时间限制:2000ms 单点时限:200ms 内存限制:256MB 描述 Given N arithmetic expressions, can you tell whose result is closest to 9? 输入 Line 1: N (1 <= N <= 50000).Line 2..N+1: Each line contains an expression in the format of "a op b"…

时间限制:2000ms 单点时限:200ms 内存限制:256MB 描述 Given N arithmetic expressions, can you tell whose result is closest to 9? 输入 Line 1: N (1 <= N <= 50000).Line 2..N+1: Each line contains an expression in the format of "a op b" where a, b are integers…

时间限制:2000ms 单点时限:200ms 内存限制:256MB 描写叙述 Given N arithmetic expressions, can you tell whose result is closest to 9? 输入 Line 1: N (1 <= N <= 50000). Line 2..N+1: Each line contains an expression in the format of "a op b" where a, b are intege…

Notes from The C Programming Language A decimal point in a constant indicates that it is floating point, however, so $5.0/9.0$ i not truncated because it is the ratio of two floating-point values. printf specification %3.0f says that a floating-point…

Codeforces 115 D 题意:给一个没有括号的表达式,问有多少种添加括号的方法使得这是一个合法的表达式?输入可能有正负号.加减乘除.数字. 思路1: 这是不能过的\(naive\)的\(dp\). 考虑\(dp(l,r)\)表示从第\(l\)个字符到第\(r\)个字符有多少种添加括号的方法. 转移的时候就枚举当前最后一次运算. 思路2: 这是\(tourist\)的神奇\(dp\). 考虑\(dp(i,j)\)表示第\(i\)个正负符号到第\(j\)个连续符号段连着的那个数字有多少种添…

Description   Problem E: Expressions2007/2008 ACM International Collegiate Programming Contest University of Ulm Local Contest Problem E: Expressions Arithmetic expressions are usually written with the operators in between the two operands (which is…

Description Do you know reverse Polish notation (RPN)? It is a known notation in the area of mathematics and computer science. It is also known as postfix notation since every operator in an expression follows all of its operands. Bob is a student in…